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Kostyleva D, Mukha I, Acosta L, Casarejos E, Chudoba V, Ciemny AA, Dominik W, Dueñas JA, Dunin V, Espino JM, Estradé A, Farinon F, Fomichev A, Geissel H, Gorshkov A, Grigorenko LV, Janas Z, Kamiński G, Kiselev O, Knöbel R, Krupko S, Kuich M, Litvinov YA, Marquinez-Durán G, Martel I, Mazzocchi C, Nociforo C, Ordúz AK, Pfützner M, Pietri S, Pomorski M, Prochazka A, Rymzhanova S, Sánchez-Benítez AM, Scheidenberger C, Simon H, Sitar B, Slepnev R, Stanoiu M, Strmen P, Szarka I, Takechi M, Tanaka YK, Weick H, Winkler M, Winfield JS, Xu X, Zhukov MV. Towards the Limits of Existence of Nuclear Structure: Observation and First Spectroscopy of the Isotope ^{31}K by Measuring Its Three-Proton Decay. Phys Rev Lett 2019; 123:092502. [PMID: 31524489 DOI: 10.1103/physrevlett.123.092502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 06/28/2019] [Indexed: 06/10/2023]
Abstract
The most remote isotope from the proton dripline (by 4 atomic mass units) has been observed: ^{31}K. It is unbound with respect to three-proton (3p) emission, and its decays have been detected in flight by measuring the trajectories of all decay products using microstrip detectors. The 3p emission processes have been studied by the means of angular correlations of ^{28}S+3p and the respective decay vertices. The energies of the previously unknown ground and excited states of ^{31}K have been determined. This provides its 3p separation energy value S_{3p} of -4.6(2) MeV. Upper half-life limits of 10 ps of the observed ^{31}K states have been derived from distributions of the measured decay vertices.
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Affiliation(s)
- D Kostyleva
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - I Mukha
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - L Acosta
- INFN, Laboratori Nazionali del Sud, Via S. Sofía, 95123 Catania, Italy
- Instituto de Física, Universidad Nacional Autónoma de México, México, Distrito Federal 01000, Mexico
| | | | - V Chudoba
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
- Institute of Physics, Silesian University Opava, 74601 Opava, Czech Republic
| | - A A Ciemny
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - W Dominik
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - J A Dueñas
- Departamento de Ingenieria Electrica y Centro de Estudios Avanzados en Fisica, Matemáticas y Computación, Universidad de Huelva, 21071 Huelva, Spain
| | - V Dunin
- Veksler and Baldin Laboratory of High Energy Physics, JINR, 141980 Dubna, Russia
| | - J M Espino
- Department of Atomic, Molecular and Nuclear Physics, University of Seville, 41012 Seville, Spain
| | - A Estradé
- University of Edinburgh, EH1 1HT Edinburgh, United Kingdom
| | - F Farinon
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - A Fomichev
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - A Gorshkov
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - L V Grigorenko
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
- National Research Nuclear University "MEPhI," 115409 Moscow, Russia
- National Research Centre "Kurchatov Institute," Kurchatov square 1, 123182 Moscow, Russia
| | - Z Janas
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - G Kamiński
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
- Heavy Ion Laboratory, University of Warsaw, 02-093 Warszawa, Poland
| | - O Kiselev
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - R Knöbel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - S Krupko
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - M Kuich
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
- Faculty of Physics, Warsaw University of Technology, 00-662 Warszawa, Poland
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - G Marquinez-Durán
- Department of Applied Physics, University of Huelva, 21071 Huelva, Spain
| | - I Martel
- Department of Physics, University of Liverpool, Liverpool L69 9ZE, United Kingdom
| | - C Mazzocchi
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - C Nociforo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - A K Ordúz
- Grand Accélérateur National d'Ions Lourds - GANIL, Bd Henri Becquerel, 14076 Caen, France
| | - M Pfützner
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - S Pietri
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - M Pomorski
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - A Prochazka
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - S Rymzhanova
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - A M Sánchez-Benítez
- Centro de Estudios Avanzados en Física, Matemáticas y Computación (CEAFMC), Department of Integrated Sciences, University of Huelva, 21071 Huelva, Spain
| | - C Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - H Simon
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - B Sitar
- Faculty of Mathematics and Physics, Comenius University, 84248 Bratislava, Slovakia
| | - R Slepnev
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - M Stanoiu
- IFIN-HH, Post Office Box MG-6, 077125 Bucharest, Romania
| | - P Strmen
- Faculty of Mathematics and Physics, Comenius University, 84248 Bratislava, Slovakia
| | - I Szarka
- Faculty of Mathematics and Physics, Comenius University, 84248 Bratislava, Slovakia
| | - M Takechi
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - Y K Tanaka
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- University of Tokyo, 113-0033 Tokyo, Japan
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - M Winkler
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - J S Winfield
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - X Xu
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - M V Zhukov
- Department of Physics, Chalmers University of Technology, S-41296 Göteborg, Sweden
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Mukha I, Grigorenko LV, Xu X, Acosta L, Casarejos E, Ciemny AA, Dominik W, Duénas-Díaz J, Dunin V, Espino JM, Estradé A, Farinon F, Fomichev A, Geissel H, Golubkova TA, Gorshkov A, Janas Z, Kamiński G, Kiselev O, Knöbel R, Krupko S, Kuich M, Litvinov YA, Marquinez-Durán G, Martel I, Mazzocchi C, Nociforo C, Ordúz AK, Pfützner M, Pietri S, Pomorski M, Prochazka A, Rymzhanova S, Sánchez-Benítez AM, Scheidenberger C, Sharov P, Simon H, Sitar B, Slepnev R, Stanoiu M, Strmen P, Szarka I, Takechi M, Tanaka YK, Weick H, Winkler M, Winfield JS, Zhukov MV. Observation and Spectroscopy of New Proton-Unbound Isotopes ³⁰Ar and ²⁹Cl: An Interplay of Prompt Two-Proton and Sequential Decay. Phys Rev Lett 2015; 115:202501. [PMID: 26613434 DOI: 10.1103/physrevlett.115.202501] [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: 08/06/2015] [Indexed: 06/05/2023]
Abstract
Previously unknown isotopes (30)Ar and (29)Cl have been identified by measurement of the trajectories of their in-flight decay products (28)S+p+p and (28)S+p, respectively. The analysis of angular correlations of the fragments provided information on decay energies and the structure of the parent states. The ground states of (30)Ar and (29)Cl were found at 2.25(-0.10)(+0.15) and 1.8±0.1 MeV above the two- and one-proton thresholds, respectively. The lowest states in (30)Ar and (29)Cl point to a violation of isobaric symmetry in the structure of these unbound nuclei. The two-proton decay has been identified in a transition region between simultaneous two-proton and sequential proton emissions from the (30)Ar ground state, which is characterized by an interplay of three-body and two-body decay mechanisms. The first hint of a fine structure of the two-proton decay of (30)Ar*(2(+)) has been obtained by detecting two decay branches into the ground and first-excited states of the (28)S fragment.
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Affiliation(s)
- I Mukha
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- National Research Centre "Kurchatov Institute," Kurchatov square 1, 123182 Moscow, Russia
| | - L V Grigorenko
- National Research Centre "Kurchatov Institute," Kurchatov square 1, 123182 Moscow, Russia
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
- National Research Nuclear University "MEPhI," 115409 Moscow, Russia
| | - X Xu
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- II.Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
- School of Physics and Nuclear Energy Engineering, Beihang University, 100191 Beijing, China
| | - L Acosta
- INFN, Laboratori Nazionali del Sud, Via S. Sofía, 95123 Catania, Italy
- Instituto de Física, Universidad Nacional Autónoma de México, México, D.F. 01000, Mexico
| | | | - A A Ciemny
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - W Dominik
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - J Duénas-Díaz
- Department of Applied Physics, University of Huelva, 21071 Huelva, Spain
| | - V Dunin
- Veksler and Baldin Laboratory of High Energy Physics, JINR, 141980 Dubna, Russia
| | - J M Espino
- Department of Atomic, Molecular and Nuclear Physics, University of Seville, 41012 Seville, Spain
| | - A Estradé
- University of Edinburgh, EH1 1HT Edinburgh, United Kingdom
| | - F Farinon
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - A Fomichev
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- II.Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - T A Golubkova
- Advanced Educational and Scientific Center, Moscow State University, 121357 Moscow, Russia
| | - A Gorshkov
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - Z Janas
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - G Kamiński
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
- Institute of Nuclear Physics PAN, 31-342 Kraków, Poland
| | - O Kiselev
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - R Knöbel
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- II.Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - S Krupko
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - M Kuich
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
- Faculty of Physics, Warsaw University of Technology, 00-662 Warszawa, Poland
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - G Marquinez-Durán
- Department of Applied Physics, University of Huelva, 21071 Huelva, Spain
| | - I Martel
- Department of Applied Physics, University of Huelva, 21071 Huelva, Spain
| | - C Mazzocchi
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - C Nociforo
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - A K Ordúz
- Department of Applied Physics, University of Huelva, 21071 Huelva, Spain
| | - M Pfützner
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - S Pietri
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - M Pomorski
- Faculty of Physics, University of Warsaw, 02-093 Warszawa, Poland
| | - A Prochazka
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - S Rymzhanova
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | | | - C Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- II.Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - P Sharov
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - H Simon
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - B Sitar
- Faculty of Mathematics and Physics, Comenius University, 84248 Bratislava, Slovakia
| | - R Slepnev
- Flerov Laboratory of Nuclear Reactions, JINR, 141980 Dubna, Russia
| | - M Stanoiu
- IFIN-HH, Post Office Box MG-6, Bucharest, Romania
| | - P Strmen
- Faculty of Mathematics and Physics, Comenius University, 84248 Bratislava, Slovakia
| | - I Szarka
- Faculty of Mathematics and Physics, Comenius University, 84248 Bratislava, Slovakia
| | - M Takechi
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - Y K Tanaka
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- University of Tokyo, 113-0033 Tokyo, Japan
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - M Winkler
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - J S Winfield
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - M V Zhukov
- Fundamental Physics, Chalmers University of Technology, S-41296 Göteborg, Sweden
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