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N=32 shell closure below calcium: Low-lying structure of Ar50

Cortes, M. L.; Rodriguez, W.; Doornenbal, P.; Obertelli, A.; Holt, J. D.; Menendez, J.; Ogata, K.; Schwenk, A.; Shimizu, N.; Simonis, J.; Utsuno, Y.; Yoshida, K.; Achouri, L.; Baba, H.; Browne, F.; Calvet, D.; Chateau, F.; Chen, S.; Chiga, N.; Corsi, A.; Delbart, A.; Gheller, J-M; Giganon, A.; Gillibert, A.; Hilaire, C.; Isobe, T.; Kobayashi, T.; Kubota, Y.; Lapoux, V; Liu, H. N.; Motobayashi, T.; Murray, I; Otsu, H.; Panin, V; Paul, N.; Sakurai, H.; Sasano, M.; Steppenbeck, D.; Stuhl, L.; Sun, Y. L.; Togano, Y.; Uesaka, T.; Wimmer, K.; Yoneda, K.; Aktas, O.; Aumann, T.; Chung, L. X.; Flavigny, F.; Franchoo, S.; Gasparic, I; Gerst, R-B; Gibelin, J.; Hahn, K., I; Kim, D.; Koiwai, T.; Kondo, Y.; Koseoglou, P.; Lee, J.; Lehr, C.; Linh, B. D.; Lokotko, T.; MacCormick, M.; Moschner, K.; Nakamura, T.; Park, S. Y.; Rossi, D.; Sahin, E.; Soederstroem, P-A; Sohler, D.; Takeuchi, S.; Toernqvist, H.; Vaquero, V.; Wagner, V; Wang, S.; Werner, V; Xu, X.; Yamada, H.; Yan, D.; Yang, Z.; Yasuda, M.; Zanetti, L. (2020) N=32 shell closure below calcium: Low-lying structure of Ar50. Physical Review C, 102 (6). ISSN 2469-9985

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Low-lying excited states in the N = 32 isotope Ar-50 were investigated by in-beam gamma-ray spectroscopy following proton- and neutron-knockout, multinucleon removal, and proton inelastic scattering at the RIKEN Radioactive Isotope Beam Factory. The energies of the two previously reported transitions have been confirmed, and five additional states are presented for the first time, including a candidate for a 3(-) state. The level scheme built using gamma gamma coincidences was compared to shell-model calculations in the sd-pf model space and to ab initio predictions based on chiral two- and three-nucleon interactions. Theoretical proton- and neutron-knockout cross sections suggest that two of the new transitions correspond to 2(+) states, while the previously proposed 4(1)(+) state could also correspond to a 2(+) state.

Item Type: Article
Uncontrolled Keywords: nuclear shell model ; magic numbers ; gamma-ray spectroscopy ; radioactive beams
Subjects: NATURAL SCIENCES > Physics
Divisions: Division of Experimental Physics
Project titleProject leaderProject codeProject type
Zemljovid atomskih jezgara - neutronski bogata stranaSzilner, SuzanaIP-2018-01-1257HRZZ
Nuklearna struktura i reakcije: eksperimentima prema neutronskoj liniji kapanjaSzilner, SuzanaIP-2013-11-7194HRZZ
Depositing User: Igor Gašparić
Date Deposited: 16 Mar 2021 08:31
DOI: 10.1103/physrevc.102.064320

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