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Shell evolution of N=40 isotones towards Ca-60: First spectroscopy of Ti-62

Title
Shell evolution of N=40 isotones towards Ca-60: First spectroscopy of Ti-62
Authors
Cortes, M. L.Rodriguez, W.Doornenbal, P.Obertelli, A.Holt, J. D.Lenzi, S. M.Menendez, J.Nowacki, F.Ogata, K.Poves, A.Rodriguez, T. R.Schwenk, A.Simonis, J.Stroberg, S. R.Yoshida, K.Achouri, L.Baba, H.Browne, F.Calvet, D.Chateau, F.Chen, S.Chiga, N.Corsi, A.Delbart, A.Gheller, J-MGiganon, A.Gillibert, A.Hilaire, C.Isobe, T.Kobayashi, T.Kubota, Y.Lapoux, VLiu, H. N.Motobayashi, T.Murray, IOtsu, H.Panin, VPaul, 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, IGerst, R-BGibelin, J.Hahn, K., IKim, D.Koiwai, T.Kondo, Y.Koseoglou, R.Lee, J.Lehr, C.Linh, D.Lokotko, T.MacCormick, M.Moschner, K.Nakamura, T.Park, S. Y.Rossi, D.Sahin, E.Sohler, D.Soederstroem, R-ATakeuchi, S.Toernqvist, H.Vaquero, V.Wagner, VWang, S.Werner, VXu, X.Yamada, H.Yan, D.Yang, Z.Yasuda, M.Zanetti, L.
Ewha Authors
한인식
SCOPUS Author ID
한인식scopus
Issue Date
2020
Journal Title
PHYSICS LETTERS B
ISSN
0370-2693JCR Link

1873-2445JCR Link
Citation
PHYSICS LETTERS B vol. 800
Keywords
Shell evolutionRadioactive beamsGamma-ray spectroscopy
Publisher
ELSEVIER
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Excited states in the N = 40 isotone Ti-62 were populated via the V-63( p, 2p)Ti-62 reaction at similar to 200MeV/nucleonat the Radioactive Isotope Beam Factory and studied using gamma-ray spectroscopy. The energies of the 2(1)(+) -> 0(gs)(+) and 4(1)(+) -> 2(1)(+) transitions, observed here for the first time, indicate a deformed Ti-62 ground state. These energies are increased compared to the neighboring Cr-64 and Fe-66 isotones, suggesting a small decrease of quadrupole collectivity. The present measurement is well reproduced by large-scale shell-model calculations based on effective interactions, while ab initio and beyond mean-field calculations do not yet reproduce our findings. The shell-model calculations for Ti-62 show a dominant configuration with four neutrons excited across the N = 40 gap. Likewise, they indicate that the N = 40 island of inversion extends down to Z = 20, disfavoring a possible doubly magic character of the elusive Ca-60. (C) 2019 The Authors. Published by Elsevier B.V.
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DOI
10.1016/j.physletb.2019.135071
Appears in Collections:
사범대학 > 과학교육과 > Journal papers
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