Fast-timing study of Ga-81 from the beta decay of Zn-81

0531612 - ÚJF 2021 RIV US eng J - Journal Article
Paziy, V. - Fraile, L. M. - Mach, H. - Olaizola, B. - Simpson, G. S. - Aprahamian, A. - Bernards, C. - Briz, J. A. - Bucher, B. - Chiara, C. J. - Dlouhý, Zdeněk - Gheorghe, I. - Ghita, D. G. - Hoff, P. - Jolie, J. - Koster, U. - Kurcewicz, W. - Lica, R. - Marginean, N. - Marginean, R. - Regis, J. M. - Rudigier, M. - Sava, T. - Stanoiu, M. - Stroe, L. - Walters, W. B.
Fast-timing study of Ga-81 from the beta decay of Zn-81.
Physical Review C. Roč. 102, č. 1 (2020), č. článku 014329. ISSN 2469-9985. E-ISSN 2469-9993
Institutional support: RVO:61389005
Keywords : Zn-81 * Ga-81 * beta decay
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 3.296, year: 2020
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevC.102.014329

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.
Permanent Link: http://hdl.handle.net/11104/0310245