1
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Longfellow B, Gallant AT, Sargsyan GH, Burkey MT, Hirsh TY, Savard G, Scielzo ND, Varriano L, Brodeur M, Burdette DP, Clark JA, Lascar D, Launey KD, Mueller P, Ray D, Sharma KS, Valverde AA, Wilson GL, Yan XL. Improved Tensor Current Limit from ^{8}B β Decay Including New Recoil-Order Calculations. PHYSICAL REVIEW LETTERS 2024; 132:142502. [PMID: 38640383 DOI: 10.1103/physrevlett.132.142502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 01/11/2024] [Accepted: 03/11/2024] [Indexed: 04/21/2024]
Abstract
A precision measurement of the β^{+} decay of ^{8}B was performed using the Beta-decay Paul Trap to determine the β-ν angular correlation coefficient a_{βν}. The experimental results were combined with new ab initio symmetry-adapted no-core shell-model calculations to yield the second-most precise measurement from Gamow-Teller decays, a_{βν}=-0.3345±0.0019_{stat}±0.0021_{syst}. This value agrees with the standard model value of -1/3 and improves uncertainties in ^{8}B by nearly a factor of 2. By combining results from ^{8}B and ^{8}Li, a tight limit on tensor current coupling to right-handed neutrinos was obtained. A recent global evaluation of all other precision β decay studies suggested a nonzero value for right-handed neutrino coupling in contradiction with the standard model at just above 3σ. The present results are of comparable sensitivity and do not support this finding.
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Affiliation(s)
- B Longfellow
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A T Gallant
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G H Sargsyan
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M T Burkey
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Y Hirsh
- Soreq Nuclear Research Center, Yavne 81800, Israel
| | - G Savard
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - N D Scielzo
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - L Varriano
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - M Brodeur
- Department of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - D P Burdette
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics and Astronomy, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - J A Clark
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - D Lascar
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA
| | - K D Launey
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - P Mueller
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - D Ray
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - K S Sharma
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - A A Valverde
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - G L Wilson
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - X L Yan
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
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2
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Kanafani M, Fléchard X, Naviliat-Cuncic O, Chung GD, Leblond S, Liénard E, Mougeot X, Quéméner G, Simancas Di Filippo A, Thomas JC. Precision measurements in the beta decay of 6He. EPJ WEB OF CONFERENCES 2023. [DOI: 10.1051/epjconf/202328201010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
Abstract
We report here about the ongoing data analysis of an experiment performed at GANIL with a 25 keV 6He+ beam to determine the Fierz interference term from the β particles energy spectrum.
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3
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Müller P, Bagdasarova Y, Hong R, Leredde A, Bailey KG, Fléchard X, García A, Graner B, Knecht A, Naviliat-Cuncic O, O'Connor TP, Sternberg MG, Storm DW, Swanson HE, Wauters F, Zumwalt DW. β-Nuclear-Recoil Correlation from ^{6}He Decay in a Laser Trap. PHYSICAL REVIEW LETTERS 2022; 129:182502. [PMID: 36374704 DOI: 10.1103/physrevlett.129.182502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 05/12/2022] [Accepted: 06/01/2022] [Indexed: 06/16/2023]
Abstract
We report the first precise measurement of a β-recoil correlation from a radioactive noble gas (^{6}He) confined via a magneto-optical trap. The measurement is motivated by the search for exotic tensor-type contributions to the charged weak current. Interpreted as tensor currents with right-handed neutrinos, the measurements yield |C_{T}/C_{A}|^{2}≤0.022 (90% confidence limit, C.L.). On the other hand, for left-handed neutrinos the limits are 0.007<C_{T}/C_{A}<0.111 (90% C.L.). The sensitivity of the present measurement is mainly limited by experimental uncertainties in determining the time response properties and the distance between the atom cloud and the microchannel plate used for recoil ion detection.
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Affiliation(s)
- P Müller
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Y Bagdasarova
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - R Hong
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - A Leredde
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - K G Bailey
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - X Fléchard
- Normandie Univ, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
| | - A García
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - B Graner
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - A Knecht
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
- Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - O Naviliat-Cuncic
- Normandie Univ, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, 14000 Caen, France
- National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - T P O'Connor
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - M G Sternberg
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - D W Storm
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - H E Swanson
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
| | - F Wauters
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
- Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany
| | - D W Zumwalt
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98105, USA
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4
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Sargsyan GH, Launey KD, Burkey MT, Gallant AT, Scielzo ND, Savard G, Mercenne A, Dytrych T, Langr D, Varriano L, Longfellow B, Hirsh TY, Draayer JP. Impact of Clustering on the ^{8}Li β Decay and Recoil Form Factors. PHYSICAL REVIEW LETTERS 2022; 128:202503. [PMID: 35657888 DOI: 10.1103/physrevlett.128.202503] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 04/04/2022] [Indexed: 06/15/2023]
Abstract
We place unprecedented constraints on recoil corrections in the β decay of ^{8}Li, by identifying a strong correlation between them and the ^{8}Li ground state quadrupole moment in large-scale ab initio calculations. The results are essential for improving the sensitivity of high-precision experiments that probe the weak interaction theory and test physics beyond the standard model. In addition, our calculations predict a 2^{+} state of the α+α system that is energetically accessible to β decay but has not been observed in the experimental ^{8}Be energy spectrum, and has an important effect on the recoil corrections and β decay for the A=8 systems. This state and an associated 0^{+} state are notoriously difficult to model due to their cluster structure and collective correlations, but become feasible for calculations in the ab initio symmetry-adapted no-core shell-model framework.
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Affiliation(s)
- G H Sargsyan
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - K D Launey
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - M T Burkey
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A T Gallant
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N D Scielzo
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G Savard
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - A Mercenne
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
- Center for Theoretical Physics, Sloane Physics Laboratory, Yale University, New Haven, Connecticut 06520, USA
| | - T Dytrych
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
- Nuclear Physics Institute of the Czech Academy of Sciences, 250 68 Řež, Czech Republic
| | - D Langr
- Department of Computer Systems, Faculty of Information Technology, Czech Technical University in Prague, Prague 16000, Czech Republic
| | - L Varriano
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - B Longfellow
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - T Y Hirsh
- Soreq Nuclear Research Center, Yavne 81800, Israel
| | - J P Draayer
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
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5
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Burkey MT, Savard G, Gallant AT, Scielzo ND, Clark JA, Hirsh TY, Varriano L, Sargsyan GH, Launey KD, Brodeur M, Burdette DP, Heckmaier E, Joerres K, Klimes JW, Kolos K, Laminack A, Leach KG, Levand AF, Longfellow B, Maaß B, Marley ST, Morgan GE, Mueller P, Orford R, Padgett SW, Pérez Galván A, Pierce JR, Ray D, Segel R, Siegl K, Sharma KS, Wang BS. Improved Limit on Tensor Currents in the Weak Interaction from ^{8}Li β Decay. PHYSICAL REVIEW LETTERS 2022; 128:202502. [PMID: 35657880 DOI: 10.1103/physrevlett.128.202502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 11/01/2021] [Accepted: 12/22/2021] [Indexed: 06/15/2023]
Abstract
The electroweak interaction in the standard model is described by a pure vector-axial-vector structure, though any Lorentz-invariant component could contribute. In this Letter, we present the most precise measurement of tensor currents in the low-energy regime by examining the β-ν[over ¯] correlation of trapped ^{8}Li ions with the Beta-decay Paul Trap. We find a_{βν}=-0.3325±0.0013_{stat}±0.0019_{syst} at 1σ for the case of coupling to right-handed neutrinos (C_{T}=-C_{T}^{'}), which is consistent with the standard model prediction.
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Affiliation(s)
- M T Burkey
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - G Savard
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - A T Gallant
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N D Scielzo
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J A Clark
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - T Y Hirsh
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
- Soreq Nuclear Research Center, Yavne 81800, Israel
| | - L Varriano
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - G H Sargsyan
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - K D Launey
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - M Brodeur
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - D P Burdette
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - E Heckmaier
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Department of Physics and Astronomy, University of California Irvine, Irvine, California 92697, USA
| | - K Joerres
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - J W Klimes
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - K Kolos
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Laminack
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - K G Leach
- Department of Physics, Colorado School of Mines, Golden, Colorado, 80401 USA
| | - A F Levand
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - B Longfellow
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - B Maaß
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - S T Marley
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - G E Morgan
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - P Mueller
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - R Orford
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada
| | - S W Padgett
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - A Pérez Galván
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - J R Pierce
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - D Ray
- Physics Division, Argonne National Laboratory, Lemont, Illinois 60439, USA
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - R Segel
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA
| | - K Siegl
- Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - K S Sharma
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - B S Wang
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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6
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Schulhoff E, Drake G. Electron Shake-up and Shake-off Following 6He Beta Decay. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201611303008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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7
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Sternberg MG, Segel R, Scielzo ND, Savard G, Clark JA, Bertone PF, Buchinger F, Burkey M, Caldwell S, Chaudhuri A, Crawford JE, Deibel CM, Greene J, Gulick S, Lascar D, Levand AF, Li G, Pérez Galván A, Sharma KS, Van Schelt J, Yee RM, Zabransky BJ. Limit on Tensor Currents from ^{8}Li β Decay. PHYSICAL REVIEW LETTERS 2015; 115:182501. [PMID: 26565463 DOI: 10.1103/physrevlett.115.182501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Indexed: 06/05/2023]
Abstract
In the standard model, the weak interaction is formulated with a purely vector-axial-vector (V-A) structure. Without restriction on the chirality of the neutrino, the most general limits on tensor currents from nuclear β decay are dominated by a single measurement of the β-ν[over ¯] correlation in ^{6}He β decay dating back over a half century. In the present work, the β-ν[over ¯]-α correlation in the β decay of ^{8}Li and subsequent α-particle breakup of the ^{8}Be^{*} daughter was measured. The results are consistent with a purely V-A interaction and in the case of couplings to right-handed neutrinos (C_{T}=-C_{T}^{'}) limits the tensor fraction to |C_{T}/C_{A}|^{2}<0.011 (95.5% C.L.). The measurement confirms the ^{6}He result using a different nuclear system and employing modern ion-trapping techniques subject to different systematic uncertainties.
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Affiliation(s)
- M G Sternberg
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics, University of Washington, Seattle, Washington 98195, USA
| | - R Segel
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA
| | - N D Scielzo
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - G Savard
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J A Clark
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - P F Bertone
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - F Buchinger
- Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada
| | - M Burkey
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - S Caldwell
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - A Chaudhuri
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - J E Crawford
- Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada
| | - C M Deibel
- Department of Physics and Astronomy, Louisiana State University, Louisiana 70803, USA
- Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824, USA
| | - J Greene
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - S Gulick
- Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada
| | - D Lascar
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA
| | - A F Levand
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - G Li
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada
- Canadian Nuclear Laboratories, Chalk River, Ontario K0J 1J0, Canada
| | - A Pérez Galván
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - K S Sharma
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - J Van Schelt
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - R M Yee
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Department of Nuclear Engineering, University of California, Berkeley, California 94720, USA
| | - B J Zabransky
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
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8
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Li G, Segel R, Scielzo ND, Bertone PF, Buchinger F, Caldwell S, Chaudhuri A, Clark JA, Crawford JE, Deibel CM, Fallis J, Gulick S, Gwinner G, Lascar D, Levand AF, Pedretti M, Savard G, Sharma KS, Sternberg MG, Sun T, Van Schelt J, Yee RM, Zabransky BJ. Tensor interaction limit derived from the α-β-ν[over ¯] correlation in trapped 8Li ions. PHYSICAL REVIEW LETTERS 2013; 110:092502. [PMID: 23496705 DOI: 10.1103/physrevlett.110.092502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Indexed: 06/01/2023]
Abstract
A measurement of the α-β-ν[over ¯] angular correlation in the Gamow-Teller decay (8)Li→(8)Be(*)+ν[over ¯]+β, (8)Be(*)→α+α has been performed using ions confined in a linear Paul trap surrounded by silicon detectors. The energy difference spectrum of the α particles emitted along and opposite the direction of the β particle is consistent with the standard model prediction and places a limit of 3.1% (95.5% confidence level) on any tensor contribution to the decay. From this result, the amplitude of any tensor component C(T) relative to that of the dominant axial-vector component C(A) of the electroweak interaction is limited to |C(T)/C(A)|<0.18 (95.5% confidence level). This experimental approach is facilitated by several favorable features of the (8)Li β decay and has different systematic effects than the previous β-ν[over ¯] correlation results for a pure Gamow-Teller transition obtained from studying (6)He β decay.
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Affiliation(s)
- G Li
- Department of Physics, McGill University, Montréal, Quebéc H3A 2T8, Canada
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9
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Marks NA, Carter DJ, Sassi M, Rohl AL, Sickafus KE, Uberuaga BP, Stanek CR. Chemical evolution via beta decay: a case study in strontium-90. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2013; 25:065504. [PMID: 23315221 DOI: 10.1088/0953-8984/25/6/065504] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Using (90)Sr as a representative isotope, we present a framework for understanding beta decay within the solid state. We quantify three key physical and chemical principles, namely momentum-induced recoil during the decay event, defect creation due to physical displacement, and chemical evolution over time. A fourth effect, that of electronic excitation, is also discussed, but this is difficult to quantify and is strongly material dependent. The analysis is presented for the specific cases of SrTiO(3) and SrH(2). By comparing the recoil energy with available threshold displacement data we show that in many beta-decay situations defects such as Frenkel pairs will not be created during decay as the energy transfer is too low. This observation leads to the concept of chemical evolution over time, which we quantify using density functional theory. Using a combination of Bader analysis, phonon calculations and cohesive energy calculations, we show that beta decay leads to counter-intuitive behavior that has implications for nuclear waste storage and novel materials design.
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Affiliation(s)
- N A Marks
- Nanochemistry Research Institute, Curtin University, Perth, WA 6845, Australia.
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10
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Scielzo ND, Freedman SJ, Fujikawa BK, Vetter PA. Measurement of the beta-nu correlation using magneto-optically trapped 21Na. PHYSICAL REVIEW LETTERS 2004; 93:102501. [PMID: 15447398 DOI: 10.1103/physrevlett.93.102501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2004] [Indexed: 05/24/2023]
Abstract
The beta-neutrino correlation coefficient, a(betanu), in 21Na is inferred from detecting the beta(+) and low-energy recoil daughter nucleus. 21Na is produced at the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory and 800 000 atoms are maintained in a magneto-optical trap. From the measured time of flight of recoil ions in the presence of a drift electric field, we find a(betanu)=0.5243+/-0.0091. There may be a dependence on the trapped atom population. This and other systematic uncertainties are discussed.
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Affiliation(s)
- N D Scielzo
- Department of Physics, University of California at Berkeley and Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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11
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Sromicki J, Allet M, Bodek K, Hajdas W, Lang J, Müller R, Navert S, Naviliat-Cuncic O, Zejma J, Haeberli W. Study of time reversal violation in beta decay of polarized 8Li. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1996; 53:932-955. [PMID: 9971015 DOI: 10.1103/physrevc.53.932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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12
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Skalsey M. Improved limits on time-reversal-violating, tensor weak couplings. PHYSICAL REVIEW. C, NUCLEAR PHYSICS 1994; 49:R620-R622. [PMID: 9969346 DOI: 10.1103/physrevc.49.r620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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13
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Adelberger EG. Improved limits on scalar weak couplings. PHYSICAL REVIEW LETTERS 1993; 70:2856-2859. [PMID: 10053671 DOI: 10.1103/physrevlett.70.2856] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Calaprice FP, Commins ED, Gibbs HM, Wick GL, Dobson DA. Test of Time-Reversal Invariance and Measurements of Positron and Neutrino Asymmetries in PolarizedNe19Beta Decay. ACTA ACUST UNITED AC 1969. [DOI: 10.1103/physrev.184.1117] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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