ORRIGO, S.E.A.; RUBIO, B.; GELLETLY, W.; AGUILERA, P.; ALGORA, A.; MORALES, A.I.; AGRAMUNT, J.; AHN, D.S.; ASCHER, P.; BLANK, B.; BORCEA, C.; BOSO, A.; CAKIRLI, R.B.; CHIBA, J.; DE ANGELIS, G.; DE FRANCE, G.; DIEL, F.; DOORNENBAL, P.; FUJITA, Y.; FUKUDA, N.; GANIOĞLU, E.; GERBAUX, M.; GIOVINAZZO, J.; GO, S.; GOIGOUX, T.; GRÉVY, S.; GUADILLA, V.; INABE, N.; KISS, G.G.; KUBO, T.; KUBONO, S.; KURTUKIAN-NIETO, T.; LUBOS, D.; MAGRON, C.; MOLINA, F.; MONTANER-PIZÁ, A.; NAPOLI, D.; NISHIMURA, D.; NISHIMURA, S.; OIKAWA, H.; SHIMIZU, Y.; SIDONG, C.; SÖDERSTRÖM, P.-A.; SUMIKAMA, T.; SUZUKI, H.; TAKEDA, H.; TAKEI, Y.; TANAKA, M.; VI, P.; WU, J.; YAGI, S.

doi:10.1103/PhysRevC.103.014324

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Phys.Rev.C. 2021, vol. 103, n° 1, p. 014324

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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.< Réduire

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Nuclear Structure

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$\beta$ decay of the very neutron-deficient $^{60}$Ge and $^{62}$Ge nuclei

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