Back to Search Start Over

$\boldsymbol{N=32}$ shell closure below calcium: Low-lying structure of $^{50}$Ar

Authors :
Cortés, M. L.
Rodriguez, W.
Doornenbal, P.
Obertelli, A.
Holt, J. D.
Menéndez, J.
Ogata, K.
Schwenk, A.
Shimizu, N.
Simonis, J.
Utsuno, Y.
Yoshida, K.
Achouri, L.
Baba, H.
Browne, F.
Calvet, D.
Château, 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.
Gašparić, 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.
Söderström, 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.
Source :
Phys. Rev. C 102, 064320 (2020)
Publication Year :
2020

Abstract

Low-lying excited states in the $N=32$ isotope $^{50}$Ar were investigated by in-beam $\gamma$-ray spectroscopy following proton- and neutron-knockout, multi-nucleon 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 $4^+$ state could also correspond to a $2^+$ state.<br />Comment: Accepted for Phys. Rev. C

Subjects

Subjects :
Nuclear Experiment

Details

Database :
arXiv
Journal :
Phys. Rev. C 102, 064320 (2020)
Publication Type :
Report
Accession number :
edsarx.2011.10786
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevC.102.064320