Search for shape coexistence in the Selenium isotopes near the N=50 neutron shell closure
Year: 2025
Type: conference-paper
Abstract: Aim of this contribution is the investigation of the shape coexistence phenomenon in the neutron-rich Selenium (Z=34) isotopes at or near the N=50 shell closure, by γ-ray spectroscopy. The 83Se (N=49) and 84Se (N=50) nuclei were populated by neutron capture (ILL) and a sub-Coulomb barrier transfer reaction (IFIN-HH), respectively. The decay schemes of both nuclei were significantly extended and they are still under investigation. Concerning the 83Se, γ-spectroscopy data allowed for the identification of 28 new primary γ transitions, 16 new levels and 89 new secondary γ transitions. Firm spin and parity assignment of the newly found states will be obtained from angular correlation investigation, currently ongoing. In the case of 84Se, the γ decay from the second and third 0! states were observed for the first time and preliminary results from lifetime measurements were obtained for both the states.
Source: EPJ Web of Conferences
Authors: G. Ciconali, F. Conca, S. Bottoni, S. Leoni, B. Fornal, M. Sferrazza, C. Michelagnoli, N. Mărginean, G. Corbari, M. Luciani, G. Colombi, F. Crespi, N. Cieplicka, L. Iskra, M. Jentschel, U. Koester, R. Borcea, M. Boromiza, S. Călinescu, C. Clisu-Stan, C. Costache, D. Filipescu, N. Florea, I. Gheorghe, A. Ionescu, R. Mărginean, C. Mihai, R.E. Mihai, C. Neacșu, A. Negreț, C.R. Niță, A. Olăcel-Coman, S. Pascu, C. Petrone, L. Stan, C. Sotty, A. Turturică, G. Turturică, S. Toma, S. Ujeniuc
Institutions: Istituto Nazionale di Fisica Nucleare, University of Milan, Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Institute of Nuclear Physics, Polish Academy of Sciences, Université Libre de Bruxelles, Institut Laue-Langevin, Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4411655542