An extended investigation of the low-spin structure of the Ni-65 nucleus was performed at the Institut Laue-Langevin, Grenoble, France, via the neutron capture reaction Ni-65(n, gamma) Ni-65, using the Fission Product Prompt Gamma-Ray Spectrometer High-Purity Ge array. The level scheme of Ni-65 was significantly expanded, with two new levels and 87 newly found transitions. Angular correlation analyses were also performed, allowing us to assign spins and parities for a number of states and to determine multipolarity mixing ratios for selected y transitions. The low-energy part of the experimental level scheme (up to about 1.4 MeV) was compared with Monte Carlo shell-model calculations, which predict spherical shapes for all states, apart from the 9/2(+) and the second excited 1/2(-) states of oblate deformation.

Detailed low-spin spectroscopy of Ni-65 via neutron capture reaction [Detailed low-spin spectroscopy of Ni65 via neutron capture reaction] / C. Porzio, C. Michelagnoli, N. Cieplicka-Oryńczak, M. Sferrazza, S. Leoni, B. Fornal, Y. Tsunoda, T. Otsuka, S. Bottoni, C. Costache, F.C.L. Crespi, Ł.W. Iskra, M. Jentschel, F. Kandzia, Y.-. Kim, U. Köster, N. Mărginean, C. Mihai, P. Mutti, A. Turturică. - In: PHYSICAL REVIEW C. - ISSN 2469-9985. - 102:6(2020 Dec 10).

Detailed low-spin spectroscopy of Ni-65 via neutron capture reaction [Detailed low-spin spectroscopy of Ni65 via neutron capture reaction]

C. Porzio
Primo
;
S. Leoni
;
S. Bottoni;F.C.L. Crespi;
2020

Abstract

An extended investigation of the low-spin structure of the Ni-65 nucleus was performed at the Institut Laue-Langevin, Grenoble, France, via the neutron capture reaction Ni-65(n, gamma) Ni-65, using the Fission Product Prompt Gamma-Ray Spectrometer High-Purity Ge array. The level scheme of Ni-65 was significantly expanded, with two new levels and 87 newly found transitions. Angular correlation analyses were also performed, allowing us to assign spins and parities for a number of states and to determine multipolarity mixing ratios for selected y transitions. The low-energy part of the experimental level scheme (up to about 1.4 MeV) was compared with Monte Carlo shell-model calculations, which predict spherical shapes for all states, apart from the 9/2(+) and the second excited 1/2(-) states of oblate deformation.
Settore FIS/04 - Fisica Nucleare e Subnucleare
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/798282
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