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Gray TJ, Allmond JM, Xu Z, King TT, Lubna RS, Crawford HL, Tripathi V, Crider BP, Grzywacz R, Liddick SN, Macchiavelli AO, Miyagi T, Poves A, Andalib A, Argo E, Benetti C, Bhattacharya S, Campbell CM, Carpenter MP, Chan J, Chester A, Christie J, Clark BR, Cox I, Doetsch AA, Dopfer J, Duarte JG, Fallon P, Frotscher A, Gaballah T, Harke JT, Heideman J, Huegen H, Holt JD, Jain R, Kitamura N, Kolos K, Kondev FG, Laminack A, Longfellow B, Luitel S, Madurga M, Mahajan R, Mogannam MJ, Morse C, Neupane S, Nowicki A, Ogunbeku TH, Ong WJ, Porzio C, Prokop CJ, Rasco BC, Ronning EK, Rubino E, Ruland TJ, Rykaczewski KP, Schaedig L, Seweryniak D, Siegl K, Singh M, Stuchbery AE, Tabor SL, Tang TL, Wheeler T, Winger JA, Wood JL. Microsecond Isomer at the N=20 Island of Shape Inversion Observed at FRIB. Phys Rev Lett 2023; 130:242501. [PMID: 37390416 DOI: 10.1103/physrevlett.130.242501] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 04/26/2023] [Indexed: 07/02/2023]
Abstract
Excited-state spectroscopy from the first experiment at the Facility for Rare Isotope Beams (FRIB) is reported. A 24(2)-μs isomer was observed with the FRIB Decay Station initiator (FDSi) through a cascade of 224- and 401-keV γ rays in coincidence with ^{32}Na nuclei. This is the only known microsecond isomer (1 μs≤T_{1/2}<1 ms) in the region. This nucleus is at the heart of the N=20 island of shape inversion and is at the crossroads of the spherical shell-model, deformed shell-model, and ab initio theories. It can be represented as the coupling of a proton hole and neutron particle to ^{32}Mg, ^{32}Mg+π^{-1}+ν^{+1}. This odd-odd coupling and isomer formation provides a sensitive measure of the underlying shape degrees of freedom of ^{32}Mg, where the onset of spherical-to-deformed shape inversion begins with a low-lying deformed 2^{+} state at 885 keV and a low-lying shape-coexisting 0_{2}^{+} state at 1058 keV. We suggest two possible explanations for the 625-keV isomer in ^{32}Na: a 6^{-} spherical shape isomer that decays by E2 or a 0^{+} deformed spin isomer that decays by M2. The present results and calculations are most consistent with the latter, indicating that the low-lying states are dominated by deformation.
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Affiliation(s)
- T J Gray
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - J M Allmond
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Z Xu
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - T T King
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - R S Lubna
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - H L Crawford
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - V Tripathi
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - B P Crider
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - R Grzywacz
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - S N Liddick
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - A O Macchiavelli
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - T Miyagi
- Department of Physics, Technische Universität Darmstadt, Darmstadt, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - A Poves
- Departamento de Fìsica Teórica and IFT-UAM/CSIC, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
| | - A Andalib
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - E Argo
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - C Benetti
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - S Bhattacharya
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - C M Campbell
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - M P Carpenter
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J Chan
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - A Chester
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Christie
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - B R Clark
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - I Cox
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - A A Doetsch
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Dopfer
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - J G Duarte
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P Fallon
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - A Frotscher
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - T Gaballah
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - J T Harke
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Heideman
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - H Huegen
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - J D Holt
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics, McGill University, Montréal, Quebec City H3A 2T8, Canada
| | - R Jain
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - N Kitamura
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - K Kolos
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - F G Kondev
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - A Laminack
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - B Longfellow
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S Luitel
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - M Madurga
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - R Mahajan
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - M J Mogannam
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - C Morse
- National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - S Neupane
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - A Nowicki
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - T H Ogunbeku
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - W-J Ong
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - C Porzio
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - C J Prokop
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - B C Rasco
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - E K Ronning
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - E Rubino
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - T J Ruland
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - K P Rykaczewski
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - L Schaedig
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - D Seweryniak
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - K Siegl
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - M Singh
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - A E Stuchbery
- Department of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, Australian Capital Territory, 2601, Australia
| | - S L Tabor
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - T L Tang
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - T Wheeler
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - J A Winger
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - J L Wood
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, USA
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Crawford HL, Tripathi V, Allmond JM, Crider BP, Grzywacz R, Liddick SN, Andalib A, Argo E, Benetti C, Bhattacharya S, Campbell CM, Carpenter MP, Chan J, Chester A, Christie J, Clark BR, Cox I, Doetsch AA, Dopfer J, Duarte JG, Fallon P, Frotscher A, Gaballah T, Gray TJ, Harke JT, Heideman J, Heugen H, Jain R, King TT, Kitamura N, Kolos K, Kondev FG, Laminack A, Longfellow B, Lubna RS, Luitel S, Madurga M, Mahajan R, Mogannam MJ, Morse C, Neupane S, Nowicki A, Ogunbeku TH, Ong WJ, Porzio C, Prokop CJ, Rasco BC, Ronning EK, Rubino E, Ruland TJ, Rykaczewski KP, Schaedig L, Seweryniak D, Siegl K, Singh M, Tabor SL, Tang TL, Wheeler T, Winger JA, Xu Z. Crossing N=28 Toward the Neutron Drip Line: First Measurement of Half-Lives at FRIB. Phys Rev Lett 2022; 129:212501. [PMID: 36461950 DOI: 10.1103/physrevlett.129.212501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/14/2022] [Indexed: 06/17/2023]
Abstract
New half-lives for exotic isotopes approaching the neutron drip-line in the vicinity of N∼28 for Z=12-15 were measured at the Facility for Rare Isotope Beams (FRIB) with the FRIB decay station initiator. The first experimental results are compared to the latest quasiparticle random phase approximation and shell-model calculations. Overall, the measured half-lives are consistent with the available theoretical descriptions and suggest a well-developed region of deformation below ^{48}Ca in the N=28 isotones. The erosion of the Z=14 subshell closure in Si is experimentally confirmed at N=28, and a reduction in the ^{38}Mg half-life is observed as compared with its isotopic neighbors, which does not seem to be predicted well based on the decay energy and deformation trends. This highlights the need for both additional data in this very exotic region, and for more advanced theoretical efforts.
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Affiliation(s)
- H L Crawford
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - V Tripathi
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - J M Allmond
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - B P Crider
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - R Grzywacz
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - S N Liddick
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - A Andalib
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - E Argo
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - C Benetti
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - S Bhattacharya
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - C M Campbell
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - M P Carpenter
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J Chan
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - A Chester
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Christie
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - B R Clark
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - I Cox
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - A A Doetsch
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Dopfer
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - J G Duarte
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - P Fallon
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - A Frotscher
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - T Gaballah
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - T J Gray
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - J T Harke
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J Heideman
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - H Heugen
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - R Jain
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - T T King
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - N Kitamura
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - K Kolos
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - F G Kondev
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - A Laminack
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - B Longfellow
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R S Lubna
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - S Luitel
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - M Madurga
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - R Mahajan
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - M J Mogannam
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - C Morse
- Brookhaven National Laboratory, Upton, New York 11973, USA
| | - S Neupane
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - A Nowicki
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - T H Ogunbeku
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - W-J Ong
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - C Porzio
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - C J Prokop
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - B C Rasco
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - E K Ronning
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - E Rubino
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - T J Ruland
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - K P Rykaczewski
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - L Schaedig
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - D Seweryniak
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - K Siegl
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - M Singh
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - S L Tabor
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - T L Tang
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - T Wheeler
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - J A Winger
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - Z Xu
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
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Rasco BC, Wolińska-Cichocka M, Fijałkowska A, Rykaczewski KP, Karny M, Grzywacz RK, Goetz KC, Gross CJ, Stracener DW, Zganjar EF, Batchelder JC, Blackmon JC, Brewer NT, Go S, Heffron B, King T, Matta JT, Miernik K, Nesaraja CD, Paulauskas SV, Rajabali MM, Wang EH, Winger JA, Xiao Y, Zachary CJ. Decays of the Three Top Contributors to the Reactor ν[over ¯]_{e} High-Energy Spectrum, ^{92}Rb, ^{96gs}Y, and ^{142}Cs, Studied with Total Absorption Spectroscopy. Phys Rev Lett 2016; 117:092501. [PMID: 27610847 DOI: 10.1103/physrevlett.117.092501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Indexed: 06/06/2023]
Abstract
We report total absorption spectroscopy measurements of ^{92}Rb, ^{96gs}Y, and ^{142}Cs β decays, which are the most important contributors to the high energy ν[over ¯]_{e} spectral shape in nuclear reactors. These three β decays contribute 43% of the ν[over ¯]_{e} flux near 5.5 MeV emitted by nuclear reactors. This ν[over ¯]_{e} energy is particularly interesting due to spectral features recently observed in several experiments including the Daya Bay, Double Chooz, and RENO Collaborations. Measurements were conducted at Oak Ridge National Laboratory by means of proton-induced fission of ^{238}U with on-line mass separation of fission fragments and the Modular Total Absorption Spectrometer. We observe a β-decay pattern that is similar to recent measurements of ^{92}Rb, with a ground-state to ground-state β feeding of 91(3)%. We verify the ^{96gs}Y ground-state to ground-state β feeding of 95.5(20)%. Our measurements substantially modify the β-decay feedings of ^{142}Cs, reducing the β feeding to ^{142}Ba states below 2 MeV by 32% when compared with the latest evaluations. Our results increase the discrepancy between the observed and the expected reactor ν[over ¯]_{e} flux between 5 and 7 MeV, the maximum excess increases from ∼10% to ∼12%.
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Affiliation(s)
- B C Rasco
- JINPA, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - M Wolińska-Cichocka
- JINPA, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Heavy Ion Laboratory, University of Warsaw, PL-02-093 Warsaw, Poland
| | - A Fijałkowska
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
- Faculty of Physics, University of Warsaw, PL-02-093 Warsaw, Poland
| | - K P Rykaczewski
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - M Karny
- JINPA, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Faculty of Physics, University of Warsaw, PL-02-093 Warsaw, Poland
| | - R K Grzywacz
- JINPA, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - K C Goetz
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
- CIRE Bredesen Center, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - C J Gross
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - D W Stracener
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - E F Zganjar
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803 USA
| | - J C Batchelder
- JINPA, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Nuclear Engineering, University of California, Berkeley, Berkeley California 94720, USA
| | - J C Blackmon
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803 USA
| | - N T Brewer
- JINPA, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - S Go
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - B Heffron
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - T King
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - J T Matta
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - K Miernik
- JINPA, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Faculty of Physics, University of Warsaw, PL-02-093 Warsaw, Poland
| | - C D Nesaraja
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - S V Paulauskas
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - M M Rajabali
- Department of Physics, Tennessee Technological University, Cookeville, Tennessee 38505, USA
| | - E H Wang
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - J A Winger
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA
| | - Y Xiao
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - C J Zachary
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA
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Miernik K, Rykaczewski KP, Gross CJ, Grzywacz R, Madurga M, Miller D, Batchelder JC, Borzov IN, Brewer NT, Jost C, Korgul A, Mazzocchi C, Mendez AJ, Liu Y, Paulauskas SV, Stracener DW, Winger JA, Wolińska-Cichocka M, Zganjar EF. Large β-delayed one and two neutron emission rates in the decay of 86Ga. Phys Rev Lett 2013; 111:132502. [PMID: 24116772 DOI: 10.1103/physrevlett.111.132502] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Indexed: 06/02/2023]
Abstract
Beta decay of 86Ga was studied by means of β-neutron-γ spectroscopy. An isotopically pure ^{86}Ga beam was produced at the Holifield Radioactive Ion Beam Facility using a resonance ionization laser ion source and high-resolution electromagnetic separation. The decay of 86Ga revealed a half-life of 43(-15)(+21) ms and large β-delayed one-neutron and two-neutron branching ratios of P1n=60(10)% and P2n=20(10)%. The βγ decay of 86Ga populated a 527 keV transition that is interpreted as the deexcitation of the first 2+ state in the N=54 isotone 86Ge and suggests a quick onset of deformation in Ge isotopes beyond N=50.
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Affiliation(s)
- K Miernik
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA and Faculty of Physics, University of Warsaw, Warsaw PL-00-681, Poland
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Madurga M, Surman R, Borzov IN, Grzywacz R, Rykaczewski KP, Gross CJ, Miller D, Stracener DW, Batchelder JC, Brewer NT, Cartegni L, Hamilton JH, Hwang JK, Liu SH, Ilyushkin SV, Jost C, Karny M, Korgul A, Królas W, Kuźniak A, Mazzocchi C, Mendez AJ, Miernik K, Padgett SW, Paulauskas SV, Ramayya AV, Winger JA, Wolińska-Cichocka M, Zganjar EF. New half-lives of r-process Zn and Ga isotopes measured with electromagnetic separation. Phys Rev Lett 2012; 109:112501. [PMID: 23005622 DOI: 10.1103/physrevlett.109.112501] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 05/10/2012] [Indexed: 06/01/2023]
Abstract
The β decays of neutron-rich nuclei near the doubly magic (78)Ni were studied at the Holifield Radioactive Ion Beam Facility using an electromagnetic isobar separator. The half-lives of (82)Zn (228±10 ms), (83)Zn (117±20 ms), and (85)Ga (93±7 ms) were determined for the first time. These half-lives were found to be very different from the predictions of the global model used in astrophysical simulations. A new calculation was developed using the density functional model, which properly reproduced the new experimental values. The robustness of the new model in the (78)Ni region allowed us to extrapolate data for more neutron-rich isotopes. The revised analysis of the rapid neutron capture process in low entropy environments with our new set of measured and calculated half-lives shows a significant redistribution of predicted isobaric abundances strengthening the yield of A>140 nuclei.
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Affiliation(s)
- M Madurga
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
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6
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Winger JA, Ilyushkin SV, Rykaczewski KP, Gross CJ, Batchelder JC, Goodin C, Grzywacz R, Hamilton JH, Korgul A, Królas W, Liddick SN, Mazzocchi C, Padgett S, Piechaczek A, Rajabali MM, Shapira D, Zganjar EF, Borzov IN. Large beta-delayed neutron emission probabilities in the 78Ni region. Phys Rev Lett 2009; 102:142502. [PMID: 19392431 DOI: 10.1103/physrevlett.102.142502] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2009] [Indexed: 05/27/2023]
Abstract
The beta-delayed neutron branching ratios (P{betan}) for nuclei near doubly magic 78Ni have been directly measured using a new method combining high-resolution mass separation, reacceleration, and digital beta-gamma spectroscopy of 238U fission products. The P{betan} values for the very neutron-rich isotopes ;{76-78}Cu and 83Ga were found to be much higher than previously reported and predicted. Revised calculations of the betan process, accounting for new mass measurements and an inversion of the pi2p{3/2} and pi1f{5/2} orbitals, are in better agreement with these new experimental results.
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Affiliation(s)
- J A Winger
- Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762, USA.
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7
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Mazzocchi C, Grzywacz R, Liddick SN, Rykaczewski KP, Schatz H, Batchelder JC, Bingham CR, Gross CJ, Hamilton JH, Hwang JK, Ilyushkin S, Korgul A, Królas W, Li K, Page RD, Simpson D, Winger JA. Alpha decay of 109I and its implications for the proton decay of 105Sb and the astrophysical rapid proton-capture process. Phys Rev Lett 2007; 98:212501. [PMID: 17677769 DOI: 10.1103/physrevlett.98.212501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2007] [Indexed: 05/16/2023]
Abstract
An alpha-decay branch of (1.4+/-0.4) x 10(-4) has been discovered in the decay of 109I, which predominantly decays via proton emission. The measured Q(alpha) value of 3918+/-21 keV allows the indirect determination of the Q value for proton emission from 105Sb of 356+/-22 keV, which is approximately of 130 keV more bound than previously reported. This result is relevant for the astrophysical rapid proton-capture process, which would terminate in the 105Sn(p,gamma)106Sb(p,gamma)107Te(alpha decay)103Sn cycle at the densities expected in explosive hydrogen burning scenarios, unless unusually strong pairing effects result in a 103Sn(p,gamma)104Sb(p,gamma)105Te(alpha decay)101Sn) cycle.
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Affiliation(s)
- C Mazzocchi
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
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8
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Liddick SN, Grzywacz R, Mazzocchi C, Page RD, Rykaczewski KP, Batchelder JC, Bingham CR, Darby IG, Drafta G, Goodin C, Gross CJ, Hamilton JH, Hecht AA, Hwang JK, Ilyushkin S, Joss DT, Korgul A, Królas W, Lagergren K, Li K, Tantawy MN, Thomson J, Winger JA. Discovery of 109Xe and 105Te: superallowed alpha decay near doubly magic 100Sn. Phys Rev Lett 2006; 97:082501. [PMID: 17026296 DOI: 10.1103/physrevlett.97.082501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2006] [Revised: 06/23/2006] [Indexed: 05/12/2023]
Abstract
Two new alpha emitters 109Xe and 105Te were identified through the observation of the 109Xe --> 105Te --> 101Sn alpha-decay chain. The 109Xe nuclei were produced in the fusion-evaporation reaction 54Fe(58Ni,3n)109Xe and studied using the Recoil Mass Spectrometer at the Holifield Radioactive Ion Beam Facility. Two transitions at Ealpha = 4062 +/- 7 keV and Ealpha = 3918 +/- 9 keV were interpreted as the l = 2 and l = 0 transitions from the 7/2+ ground state in 109Xe (T1/2 = 13 +/- 2 ms) to the 5/2+ ground state and a 7/2+ excited state, located at 150 +/- 13 keV in 105Te. The observation of the subsequent decay of 105Te marks the discovery of the lightest known alpha-decaying nucleus. The measured transition energy Ealpha = 4703 +/- 5 keV and half-life T1/2 = 620 +/- 70 ns were used to determine the reduced alpha-decay width delta2. The ratio delta105Te(2)/delta213Po(2) of approximately 3 indicates a superallowed character of the alpha emission from 105Te.
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Affiliation(s)
- S N Liddick
- UNIRIB, Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831, USA
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9
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Karny M, Grzywacz RK, Batchelder JC, Bingham CR, Gross CJ, Hagino K, Hamilton JH, Janas Z, Kulp WD, McConnell JW, Momayezi M, Piechaczek A, Rykaczewski KP, Semmes PA, Tantawy MN, Winger JA, Yu CH, Zganjar EF. Fine structure in proton emission from 145Tm discovered with digital signal processing. Phys Rev Lett 2003; 90:012502. [PMID: 12570604 DOI: 10.1103/physrevlett.90.012502] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2002] [Indexed: 05/24/2023]
Abstract
Fine structure in proton emission from the 3.1(3) mus activity of 145Tm was discovered by using a novel technique of digital processing of overlapping recoil implantation and decay signals. Proton transitions to the ground state of 144Er and to its first excited 2(+) state at 0.33(1) MeV with a branching ratio I(p)(2(+))=9.6+/-1.5% were observed. The structure of the 145Tm wave function and the emission process were analyzed by using particle-core vibration coupling models.
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Affiliation(s)
- M Karny
- IFD, Warsaw University, Pl-00681 Warsaw, Hoza 69, Poland
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10
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Ressler JJ, Piechaczek A, Walters WB, Aprahamian A, Wiescher M, Batchelder JC, Bingham CR, Brenner DS, Ginter TN, Gross CJ, Grzywacz R, Kulp D, MacDonald B, Reviol W, Rikovska J, Rykaczewski K, Winger JA, Zganjar EF. Half-life measurement for the rp-process waiting point nuclide 80Zr. Phys Rev Lett 2000; 84:2104-2107. [PMID: 11017219 DOI: 10.1103/physrevlett.84.2104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/1999] [Indexed: 05/23/2023]
Abstract
X-ray bursts have been suggested as a possible site for the astrophysical rp-process. The time scale for the process is governed by beta-decay half-lives of several even-even N = Z waiting point nuclei, in particular, N = Z = 40 80Zr. A 4.1(+0.8/-0.6)-s beta(+)/EC half-life for 80Zr was determined by observing delayed 84-keV gamma rays depopulating a T(1/2) = 4-&mgr;s isomer at 312 keV in the daughter 80Y. As this half-life is lower than many previously predicted values, the calculated excessive production of A = 80 nuclides in astrophysical x-ray burst scenarios is reduced, and less extreme conditions are necessary for the production of heavier nuclides.
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Affiliation(s)
- JJ Ressler
- Department of Chemistry, University of Maryland, College Park, Maryland 20742, USA
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11
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Ieki K, Galonsky A, Sackett D, Kruse JJ, Lynch WG, Morrissey DJ, Orr NA, Sherrill BM, Winger JA, Deák F, Horváth Á, Kiss Á, Seres Z, Kolata JJ, Warner RE, Humphrey DL. Is there a bound dineutron in 11Li? Phys Rev C Nucl Phys 1996; 54:1589-1591. [PMID: 9971504 DOI: 10.1103/physrevc.54.1589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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12
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Pfaff R, Morrissey DJ, Benenson W, Fauerbach M, Hellström M, Powell CF, Sherrill BM, Steiner M, Winger JA. Fragmentation of 78Kr projectiles. Phys Rev C Nucl Phys 1996; 53:1753-1758. [PMID: 9971126 DOI: 10.1103/physrevc.53.1753] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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13
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Hanold KA, Bazin D, Mohar MF, Moretto LG, Morrissey DJ, Orr NA, Sherrill BM, Winger JA, Wozniak GJ, Yennello SJ. Heavy residues from very mass-asymmetric heavy-ion reactions. Phys Rev C Nucl Phys 1995; 52:1462-1483. [PMID: 9970650 DOI: 10.1103/physrevc.52.1462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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14
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Orr NA, Anantaraman N, Austin SM, Bertulani CA, Hanold K, Kelley JH, Kryger RA, Morrissey DJ, Sherrill BM, Souliotis GA, Steiner M, Thoennessen M, Winfield JS, Winger JA, Young BM. Momentum distributions of 9Li fragments from the breakup of 11Li and the neutron halo. Phys Rev C Nucl Phys 1995; 51:3116-3126. [PMID: 9970413 DOI: 10.1103/physrevc.51.3116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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15
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Belbot MD, Kolata JJ, Lamkin K, Tighe RJ, Zahar M, Harkewicz R, Morrissey DJ, Orr NA, Ronningen RM, Sherrill BM, Winger JA, Carpenter M. beta -delayed neutron decay of 14Be. Phys Rev C Nucl Phys 1995; 51:2372-2380. [PMID: 9970318 DOI: 10.1103/physrevc.51.2372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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16
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Pfaff R, Morrissey DJ, Fauerbach M, Hellström M, Kelley JH, Kryger RA, Sherrill BM, Steiner M, Winfield JS, Winger JA, Yennello SJ, Young BM. Projectilelike fragment momentum distributions from 86Kr+Al at 70 MeV/nucleon. Phys Rev C Nucl Phys 1995; 51:1348-1355. [PMID: 9970186 DOI: 10.1103/physrevc.51.1348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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17
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Kryger RA, Azhari A, Hellström M, Kelley JH, Kubo T, Pfaff R, Ramakrishnan E, Sherrill BM, Thoennessen M, Yokoyama S, Charity RJ, Dempsey J, Kirov A, Robertson N, Sarantites DG, Sobotka LG, Winger JA. Two-proton emission from the ground state of 12O. Phys Rev Lett 1995; 74:860-863. [PMID: 10058867 DOI: 10.1103/physrevlett.74.860] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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18
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Kelley JH, Austin SM, Kryger RA, Morrissey DJ, Orr NA, Sherrill BM, Thoennessen M, Winfield JS, Winger JA, Young BM. Parallel momentum distributions as a probe of halo wave functions. Phys Rev Lett 1995; 74:30-33. [PMID: 10057691 DOI: 10.1103/physrevlett.74.30] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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19
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Souliotis GA, Harkewicz R, McDonald KN, Morrissey DJ, Chen Y, Kashy E, Sherrill BM, Orr NA, Winger JA. Differential cross sections of projectilelike fragments from 18O and 40Ar at E/A=80 MeV. Phys Rev C Nucl Phys 1994; 49:3301-3304. [PMID: 9969611 DOI: 10.1103/physrevc.49.3301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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20
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Zahar M, Belbot M, Kolata JJ, Lamkin K, Thompson R, Kelley JH, Kryger RA, Morrissey DJ, Orr NA, Sherrill BM, Winfield JS, Winger JA, Wuosmaa AH. Quasielastic scattering of 12,14Be on 12C. Phys Rev C Nucl Phys 1994; 49:1540-1544. [PMID: 9969376 DOI: 10.1103/physrevc.49.1540] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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21
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Young BM, Benenson W, Kelley JH, Orr NA, Pfaff R, Sherrill BM, Steiner M, Thoennessen M, Winfield JS, Winger JA, Yennello SJ, Zeller A. Low-lying structure of 10Li in the reaction 11B(7Li,8B)10Li. Phys Rev C Nucl Phys 1994; 49:279-283. [PMID: 9969221 DOI: 10.1103/physrevc.49.279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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22
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Scheller KW, Görres J, Ross JG, Wiescher M, Harkewicz R, Morrissey DJ, Sherrill BM, Steiner M, Orr NA, Winger JA. Study of the beta -delayed neutron decay of 18N. Phys Rev C Nucl Phys 1994; 49:46-50. [PMID: 9969199 DOI: 10.1103/physrevc.49.46] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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23
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Young BM, Benenson W, Fauerbach M, Kelley JH, Pfaff R, Sherrill BM, Steiner M, Winfield JS, Kubo T, Hellström M, Orr NA, Stetson J, Winger JA, Yennello SJ. Mass of 11Li from the 14C(11B,11Li)14O reaction. Phys Rev Lett 1993; 71:4124-4126. [PMID: 10055162 DOI: 10.1103/physrevlett.71.4124] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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24
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Winger JA, Bazin DP, Benenson W, Crawley GM, Morrissey DJ, Orr NA, Pfaff R, Sherrill BM, Thoennessen M, Yennello SJ, Young BM. Half-life measurements for 61Ga, 63Ge, and 65As and their importance in the rp process. Phys Rev C Nucl Phys 1993; 48:3097-3105. [PMID: 9969184 DOI: 10.1103/physrevc.48.3097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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25
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Zahar M, Belbot M, Kolata JJ, Lamkin K, Thompson R, Orr NA, Kelley JH, Kryger RA, Morrissey DJ, Sherrill BM, Winger JA, Winfield JS, Wuosmaa AH. Momentum distributions for 12,14Be fragmentation. Phys Rev C Nucl Phys 1993; 48:R1484-R1487. [PMID: 9969066 DOI: 10.1103/physrevc.48.r1484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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26
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Sackett D, Ieki K, Galonsky A, Bertulani CA, Esbensen H, Kruse JJ, Lynch WG, Morrissey DJ, Orr NA, Sherrill BM, Schulz H, Sustich A, Winger JA, Deák F, Horváth Á, Kiss Á, Seres Z, Kolata JJ, Warner RE, Humphrey DL. Electromagnetic excitation of 11Li. Phys Rev C Nucl Phys 1993; 48:118-135. [PMID: 9968801 DOI: 10.1103/physrevc.48.118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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27
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Zhao Z, France RH, Lai KS, Gai M, Wilds EL, Kryger RA, Winger JA, Beard KB. Study of the beta-delayed alpha-particle emission of 16N. Phys Rev C Nucl Phys 1993; 48:429-432. [PMID: 9968837 DOI: 10.1103/physrevc.48.429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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28
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Kryger RA, Azhari A, Galonsky A, Kelley JH, Pfaff R, Ramakrishnan E, Sackett D, Sherrill BM, Thoennessen M, Winger JA, Yokoyama S. Neutron decay of 10Li produced by fragmentation. Phys Rev C Nucl Phys 1993; 47:R2439-R2442. [PMID: 9968785 DOI: 10.1103/physrevc.47.r2439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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29
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Chen Y, Kashy E, Bazin D, Benenson W, Morrissey DJ, Orr NA, Sherrill BM, Winger JA, Young B, Yurkon J. Half-life of 32Si. Phys Rev C Nucl Phys 1993; 47:1462-1465. [PMID: 9968590 DOI: 10.1103/physrevc.47.1462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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30
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Ieki K, Sackett D, Galonsky A, Bertulani CA, Kruse JJ, Lynch WG, Morrissey DJ, Orr NA, Schulz H, Sherrill BM, Sustich A, Winger JA, Deák F, Horváth Á, Kiss Á, Seres Z, Kolata JJ, Warner RE, Humphrey DL. Coulomb dissociation of 11Li. Phys Rev Lett 1993; 70:730-733. [PMID: 10054189 DOI: 10.1103/physrevlett.70.730] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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31
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Yennello SJ, Winger JA, Antaya T, Benenson W, Mohar MF, Morrissey DJ, Orr NA, Sherrill BM. New nuclei near the proton drip line around Z=40. Phys Rev C Nucl Phys 1992; 46:2620-2623. [PMID: 9968392 DOI: 10.1103/physrevc.46.2620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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32
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Kolata JJ, Zahar M, Smith R, Lamkin K, Belbot M, Tighe R, Sherrill BM, Orr NA, Winfield JS, Winger JA, Yennello SJ, Satchler GR, Wuosmaa AH. Quasielastic scattering of 11Li and 11C from 12C at 60 MeV/nucleon. Phys Rev Lett 1992; 69:2631-2634. [PMID: 10046544 DOI: 10.1103/physrevlett.69.2631] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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33
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Orr NA, Anantaraman N, Austin SM, Bertulani CA, Hanold K, Kelley JH, Morrissey DJ, Sherrill BM, Souliotis GA, Thoennessen M, Winfield JS, Winger JA. Momentum distributions of 9Li fragments following the breakup of 11Li. Phys Rev Lett 1992; 69:2050-2053. [PMID: 10046386 DOI: 10.1103/physrevlett.69.2050] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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34
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Souliotis GA, Morrissey DJ, Orr NA, Sherrill BM, Winger JA. 0 degrees measurements of momentum distributions of projectile-like fragments. Phys Rev C Nucl Phys 1992; 46:1383-1392. [PMID: 9968245 DOI: 10.1103/physrevc.46.1383] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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35
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Görres J, Wiescher M, Scheller K, Morrissey DJ, Sherrill BM, Bazin D, Winger JA. beta -delayed proton decay of 20Mg and its astrophysical implications. Phys Rev C Nucl Phys 1992; 46:R833-R837. [PMID: 9968224 DOI: 10.1103/physrevc.46.r833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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36
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Harkewicz R, Morrissey DJ, Brown BA, Nolen JA, Orr NA, Sherrill BM, Winfield JS, Winger JA. beta -decay branching ratios of the neutron-rich nucleus 15B. Phys Rev C Nucl Phys 1991; 44:2365-2371. [PMID: 9967666 DOI: 10.1103/physrevc.44.2365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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37
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Hill JC, Schwellenbach DD, Wohn FK, Winger JA, Gill RL, Ohm H, Sistemich K. Structure of highly deformed 102Zr populated in decay of low- and high-spin isomers of 102Y. Phys Rev C Nucl Phys 1991; 43:2591-2598. [PMID: 9967320 DOI: 10.1103/physrevc.43.2591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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38
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Mohar MF, Bazin D, Benenson W, Morrissey DJ, Orr NA, Sherrill BM, Swan D, Winger JA, Mueller AC, Guillemaud-Mueller D. Identification of new nuclei near the proton-drip line for 31 <= Z <= 38. Phys Rev Lett 1991; 66:1571-1574. [PMID: 10043244 DOI: 10.1103/physrevlett.66.1571] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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39
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Winger JA, Hill JC, Wohn FK, Warburton EK, Gill RL, Piotrowski A, Schuhmann RB, Brenner DS. Structure of 76Zn from 76Cu decay and systematics of neutron-rich Zn nuclei. Phys Rev C Nucl Phys 1990; 42:954-960. [PMID: 9966808 DOI: 10.1103/physrevc.42.954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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40
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Mach H, Moszynski M, Gill RL, Molnár G, Wohn FK, Winger JA, Hill JC. Reply to "Comment on 'Monopole strength and shape coexistence in the A. Phys Rev C Nucl Phys 1990; 42:793-795. [PMID: 9966777 DOI: 10.1103/physrevc.42.793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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41
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Winger JA, Hill JC, Cumming JB, Beavis D. 12C(28Si,X)11C cross section at 13.4 GeV nucleon. Phys Rev C Nucl Phys 1990; 41:2931-2932. [PMID: 9966677 DOI: 10.1103/physrevc.41.2931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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42
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Büscher M, Casten RF, Gill RL, Schuhmann R, Winger JA, Mach H, Moszynski M, Sistemich K. Coexistence features in the spherical-deformed A. Phys Rev C Nucl Phys 1990; 41:1115-1125. [PMID: 9966453 DOI: 10.1103/physrevc.41.1115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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43
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Mach H, Moszynski M, Gill RL, Molnár G, Wohn FK, Winger JA, Hill JC. Monopole strength and shape coexistence in the A. Phys Rev C Nucl Phys 1990; 41:350-353. [PMID: 9966349 DOI: 10.1103/physrevc.41.350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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44
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Mach H, Warburton EK, Gill RL, Casten RF, Becker JA, Brown BA, Winger JA. Meson-exchange enhancement of the first-forbidden 96Yg(0(-))-->96Zrg (0(+)) beta transition: beta decay of the low-spin isomer of 96Y. Phys Rev C Nucl Phys 1990; 41:226-242. [PMID: 9966335 DOI: 10.1103/physrevc.41.226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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45
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Winger JA, Hill JC, Wohn FK, Brenner DS. Structure of odd-odd 74Ga from the decay of neutron-rich 74Zn. Phys Rev C Nucl Phys 1989; 40:1061-1064. [PMID: 9966070 DOI: 10.1103/physrevc.40.1061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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46
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Wolf A, Sistemich K, Mach H, Gill RL, Casten RF, Winger JA. Magnetic moment of the 21+ state in 98Sr. Phys Rev C Nucl Phys 1989; 40:932-935. [PMID: 9966056 DOI: 10.1103/physrevc.40.932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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47
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Mach H, Moszynski M, Casten RF, Gill RL, Brenner DS, Winger JA, Krips W, Wesselborg C, Büscher M, Wohn FK, Aprahamian A, Alburger D, Gelberg A, Piotrowski A. Picosecond lifetime measurements in 116,118,120Cd and the structure of normal and intruder states. Phys Rev Lett 1989; 63:143-146. [PMID: 10040791 DOI: 10.1103/physrevlett.63.143] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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48
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Winger JA, Hill JC, Wohn FK, Warburton EK, Gill RL, Piotrowski A, Brenner DS. Structure of neutron-rich 74Zn from 74Cu decay and shell-model calculations for even-A Zn nuclei. Phys Rev C Nucl Phys 1989; 39:1976-1984. [PMID: 9955423 DOI: 10.1103/physrevc.39.1976] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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49
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Hill JC, Wohn FK, Winger JA, Khayat M, Mercier MT, Smith AR. Two-neutron emission from electromagnetic dissociation of 59Co and 197Au targets by relativistic heavy ions. Phys Rev C Nucl Phys 1989; 39:524-529. [PMID: 9955224 DOI: 10.1103/physrevc.39.524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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50
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Hill JC, Wohn FK, Winger JA, Khayat M, Leininger K, Smith AR. Electromagnetic dissociation of 59Co and 197Au targets by relativistic 139La projectiles. Phys Rev C Nucl Phys 1988; 38:1722-1729. [PMID: 9954982 DOI: 10.1103/physrevc.38.1722] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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