β decay of the very neutron-deficient Ge 60 and Ge 62 nuclei

S. E.A. Orrigo, B. Rubio, W. Gelletly, P. Aguilera, A. Algora, A. I. Morales, J. Agramunt, D. S. Ahn, P. Ascher, B. Blank, C. Borcea, A. Boso, R. B. Cakirli, J. Chiba, G. De Angelis, G. De France, F. Diel, P. Doornenbal, Y. Fujita, N. FukudaE. Ganioǧlu, M. Gerbaux, J. Giovinazzo, S. Go, T. Goigoux, S. Grévy, V. Guadilla, N. Inabe, G. G. Kiss, T. Kubo, S. Kubono, T. Kurtukian-Nieto, D. Lubos, C. Magron, F. Molina, A. Montaner-Pizá, D. Napoli, D. Nishimura, S. Nishimura, H. Oikawa, V. H. Phong, H. Sakurai, Y. Shimizu, C. Sidong, P. A. Söderström, T. Sumikama, H. Suzuki, H. Takeda, Y. Takei, M. Tanaka, J. Wu, S. Yagi

Research output: Contribution to journalArticlepeer-review

Abstract

We report here the results of a study of the β decay of the proton-rich Ge isotopes, Ge60 and Ge62, produced in an experiment at the RIKEN Nishina Center. We have improved our knowledge of the half-lives of Ge62 [73.5(1) ms] and Ge60 [25.0(3) ms] and its daughter nucleus, Ga60 [69.4(2) ms]. We measured individual β-delayed proton and γ emissions and their related branching ratios. Decay schemes and absolute Fermi and Gamow-Teller transition strengths have been determined. The mass excesses of the nuclei under study have been deduced. A total β-delayed proton-emission branching ratio of 67(3)% has been obtained for Ge60. New information has been obtained on the energy levels populated in Ga60 and on the 1/2- excited state in the βp daughter Zn59. We extracted a ground state-to-ground state feeding of 85.3(3)% for the decay of Ge62. Eight new γ lines have been added to the deexcitation of levels populated in the Ga62 daughter.

Original languageEnglish
Article number014324
JournalPhysical Review C
Volume103
Issue number1
DOIs
Publication statusPublished - Jan 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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