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Goigoux T, Ascher P, Blank B, Gerbaux M, Giovinazzo J, Grévy S, Kurtukian Nieto T, Magron C, Doornenbal P, Kiss GG, Nishimura S, Söderström PA, Phong VH, Wu J, Ahn DS, Fukuda N, Inabe N, Kubo T, Kubono S, Sakurai H, Shimizu Y, Sumikama T, Suzuki H, Takeda H, Agramunt J, Algora A, Guadilla V, Montaner-Piza A, Morales AI, Orrigo SEA, Rubio B, Fujita Y, Tanaka M, Gelletly W, Aguilera P, Molina F, Diel F, Lubos D, de Angelis G, Napoli D, Borcea C, Boso A, Cakirli RB, Ganioglu E, Chiba J, Nishimura D, Oikawa H, Takei Y, Yagi S, Wimmer K, de France G, Go S, Brown BA. Two-Proton Radioactivity of ^{67}Kr. Phys Rev Lett 2016; 117:162501. [PMID: 27792367 DOI: 10.1103/physrevlett.117.162501] [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: 05/19/2016] [Indexed: 06/06/2023]
Abstract
In an experiment with the BigRIPS separator at the RIKEN Nishina Center, we observed two-proton (2p) emission from ^{67}Kr. At the same time, no evidence for 2p emission of ^{59}Ge and ^{63}Se, two other potential candidates for this exotic radioactivity, could be observed. This observation is in line with Q value predictions which pointed to ^{67}Kr as being the best new candidate among the three for two-proton radioactivity. ^{67}Kr is only the fourth 2p ground-state emitter to be observed with a half-life of the order of a few milliseconds. The decay energy was determined to be 1690(17) keV, the 2p emission branching ratio is 37(14)%, and the half-life of ^{67}Kr is 7.4(30) ms.
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Affiliation(s)
- T Goigoux
- Centre d'Études Nucléaires de Bordeaux Gradignan, Université de Bordeaux-UMR 5797 CNRS/IN2P3, Chemin du Solarium, 33175 Gradignan, France
| | - P Ascher
- Centre d'Études Nucléaires de Bordeaux Gradignan, Université de Bordeaux-UMR 5797 CNRS/IN2P3, Chemin du Solarium, 33175 Gradignan, France
| | - B Blank
- Centre d'Études Nucléaires de Bordeaux Gradignan, Université de Bordeaux-UMR 5797 CNRS/IN2P3, Chemin du Solarium, 33175 Gradignan, France
| | - M Gerbaux
- Centre d'Études Nucléaires de Bordeaux Gradignan, Université de Bordeaux-UMR 5797 CNRS/IN2P3, Chemin du Solarium, 33175 Gradignan, France
| | - J Giovinazzo
- Centre d'Études Nucléaires de Bordeaux Gradignan, Université de Bordeaux-UMR 5797 CNRS/IN2P3, Chemin du Solarium, 33175 Gradignan, France
| | - S Grévy
- Centre d'Études Nucléaires de Bordeaux Gradignan, Université de Bordeaux-UMR 5797 CNRS/IN2P3, Chemin du Solarium, 33175 Gradignan, France
| | - T Kurtukian Nieto
- Centre d'Études Nucléaires de Bordeaux Gradignan, Université de Bordeaux-UMR 5797 CNRS/IN2P3, Chemin du Solarium, 33175 Gradignan, France
| | - C Magron
- Centre d'Études Nucléaires de Bordeaux Gradignan, Université de Bordeaux-UMR 5797 CNRS/IN2P3, Chemin du Solarium, 33175 Gradignan, France
| | - P Doornenbal
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - G G Kiss
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Nishimura
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - P-A Söderström
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - V H Phong
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - J Wu
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - D S Ahn
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - N Fukuda
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - N Inabe
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - T Kubo
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Kubono
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - H Sakurai
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Y Shimizu
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - T Sumikama
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - H Suzuki
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - H Takeda
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - J Agramunt
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
| | - A Algora
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
- Institute of Nuclear Research of the Hungarian Academy of Sciences, P.O. Box 51, H-4001 Debrecen, Hungary
| | - V Guadilla
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
| | - A Montaner-Piza
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
| | - A I Morales
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
| | - S E A Orrigo
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
| | - B Rubio
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
| | - Y Fujita
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - M Tanaka
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - W Gelletly
- Instituto de Física Corpuscular, CSIC-Universidad de Valencia, E-46071 Valencia, Spain
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - P Aguilera
- Comisión Chilena de Energía Nuclear, Casilla 188-D, Amunátegui 95, Santiago Centro, Santiago, Chile
| | - F Molina
- Comisión Chilena de Energía Nuclear, Casilla 188-D, Amunátegui 95, Santiago Centro, Santiago, Chile
| | - F Diel
- Institute of Nuclear Physics, University of Cologne, D-50937 Cologne, Germany
| | - D Lubos
- Physik Department E12, Technische Universität München, D-85748 Garching, Germany
| | - G de Angelis
- Laboratori Nazionali di Legnaro dell'INFN, I-35020 Legnaro (Padova), Italy
| | - D Napoli
- Laboratori Nazionali di Legnaro dell'INFN, I-35020 Legnaro (Padova), Italy
| | - C Borcea
- National Institute for Physics and Nuclear Engineering IFIN-HH, P.O. Box MG-6, Bucharest-Magurele, Romania
| | - A Boso
- INFN Sezione di Padova and Dipartimento di Fisica, Università di Padova, I-35131 Padova, Italy
| | - R B Cakirli
- Department of Physics, Istanbul University, Istanbul 34134, Turkey
| | - E Ganioglu
- Department of Physics, Istanbul University, Istanbul 34134, Turkey
| | - J Chiba
- Department of Physics, Tokyo University of Science, Noda, Chiba 278-8510, Japan
| | - D Nishimura
- Department of Physics, Tokyo University of Science, Noda, Chiba 278-8510, Japan
| | - H Oikawa
- Department of Physics, Tokyo University of Science, Noda, Chiba 278-8510, Japan
| | - Y Takei
- Department of Physics, Tokyo University of Science, Noda, Chiba 278-8510, Japan
| | - S Yagi
- Department of Physics, Tokyo University of Science, Noda, Chiba 278-8510, Japan
| | - K Wimmer
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - G de France
- Grand Accélérateur National d'Ions Lourds, B.P. 55027, F-14076 Caen Cedex 05, France
| | - S Go
- Department of Physics and Astronomy, University of Tennessee, 401 Nielsen Physics Building, 1408 Circle Drive, Knoxville, Tennessee 37996-1200, USA
| | - B A Brown
- Department of Physics and Astronomy, and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321, USA
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