Search for shape coexistence in the Selenium isotopes near the N=50 neutron shell closure
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 83 Se (N=49) and 84 Se (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 83 Se, 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 84 Se, 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.
Authors
- N. Cieplicka
- G. Ciconali
- D. Filipescu (ORCID: https://orcid.org/0000-0003-3282-1594)
- I. Gheorghe (ORCID: https://orcid.org/0000-0003-3818-0994)
- C. R. Niţă (ORCID: https://orcid.org/0009-0005-2312-676X)
- Sofia I. Pascu (ORCID: https://orcid.org/0000-0001-6385-4650)
- A. Turturică (ORCID: https://orcid.org/0000-0002-0442-7189)
- B. Fornal (ORCID: https://orcid.org/0000-0002-1142-8067)
- F. C. L. Crespi (ORCID: https://orcid.org/0000-0003-2254-4255)
- N. Mărginean (ORCID: https://orcid.org/0000-0002-5744-9920)
- R. Mărginean
- S. Călinescu (ORCID: https://orcid.org/0000-0002-8232-6148)
- G. Corbari (ORCID: https://orcid.org/0000-0002-1123-6348)
- C. Mihai (ORCID: https://orcid.org/0000-0003-1103-1534)
- A. Ionescu (ORCID: https://orcid.org/0000-0001-9203-9444)
- R. E. Mihai (ORCID: https://orcid.org/0000-0002-2809-7946)
- M. Luciani (ORCID: https://orcid.org/0009-0002-0343-0068)
- Ł. W. Iskra (ORCID: https://orcid.org/0000-0003-1495-4174)
- G. Colombi (ORCID: https://orcid.org/0000-0002-8053-9326)
- L. Stan (ORCID: https://orcid.org/0000-0002-3509-1606)
- S. Leoni (ORCID: https://orcid.org/0000-0002-3691-0749)
- M. Jentschel (ORCID: https://orcid.org/0000-0001-8932-4682)
- S. Bottoni (ORCID: https://orcid.org/0000-0003-2249-4825)
- Catalin C. Neacsu (ORCID: https://orcid.org/0000-0002-9333-3538)
- G.V. Turturică
- Sebastian Ionut Toma
- R. Borcea
- C. Costache (ORCID: https://orcid.org/0000-0002-8824-1778)
- Michele Sferrazza
- S. Ujeniuc
- F. Conca
- C. Clisu-Stan
- A. Olăcel-Coman
- C. Petrone (ORCID: https://orcid.org/0009-0000-1194-3600)
- A. Negreţ (ORCID: https://orcid.org/0000-0002-1285-704X)
- C. Sotty
- C. Michelagnoli
- U. Köester
- M. Boromiza
Institutions
- Université Libre de Bruxelles (BE)
- Istituto Nazionale di Fisica Nucleare (IT)
- University of Milan (IT)
- Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering (RO)
- The Institute of the Polish Language of the Polish Academy of Sciences (PL)
- Institut Laue-Langevin (FR)
- Istituto Nazionale di Fisica Nucleare, Sezione di Milano (IT)
Publication Details
- Journal
- EPJ Web of Conferences
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1051/epjconf/202532901003
- Primary Topic
- Nuclear physics research studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00