Fast-timing study of Ga81 from the β decay of Zn81
| Autor: | V. Paziy, L. M. Fraile, H. Mach, B. Olaizola, G. S. Simpson, A. Aprahamian, C. Bernards, J. A. Briz, B. Bucher, C. J. Chiara, Z. Dlouhý, I. Gheorghe, D. Ghiţǎ, P. Hoff, J. Jolie, U. Köster, W. Kurcewicz, R. Licǎ, N. Mǎrginean, R. Mǎrginean, J.-M. Régis, M. Rudigier, T. Sava, M. Stǎnoiu, L. Stroe, W. B. Walters |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Physical Review C. 102 |
| ISSN: | 2469-9993 2469-9985 |
| Popis: | The beta-decay of Zn-81 to the neutron magic N = 50 nucleus Ga-81, with only three valence protons with respect to Ni-78, was investigated. The study was performed at the ISOLDE facility at CERN by means of gamma spectroscopy. The 81Zn half-life was determined to be T-1/2 = 290(4) ms while the beta-delayed neutron emission probability was measured as P-n = 23(4)%. The analysis of the beta-gated gamma-ray singles and gamma-gamma coincidences from the decay of Zn-81 provides 47 new levels and 70 new transitions in Ga-81. The beta(-)n decay of Zn-81 was observed and a new decay scheme into the odd-odd Ga-80 nucleus was established. The half-lives of the first and second excited states of Ga-81 were measured via the fast-timing method using LaBr3(Ce) detectors. The level scheme and transition rates are compared to large-scale shell-model calculations. The low-lying structure of (81)Gais interpreted in terms of the coupling of the three valence protons outside the doubly magic Ni-78 core. |
| Databáze: | OpenAIRE |
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