Aoi N, Takeshita E, Suzuki H, Takeuchi S, Ota S, Baba H, Bishop S, Fukui T, Hashimoto Y, Ong HJ, Ideguchi E, Ieki K, Imai N, Ishihara M, Iwasaki H, Kanno S, Kondo Y, Kubo T, Kurita K, Kusaka K, Minemura T, Motobayashi T, Nakabayashi T, Nakamura T, Nakao T, Niikura M, Okumura T, Ohnishi TK, Sakurai H, Shimoura S, Sugo R, Suzuki D, Suzuki MK, Tamaki M, Tanaka K, Togano Y, Yamada K. Development of large deformation in 62Cr.
Phys Rev Lett 2009;
102:012502. [PMID:
19257184 DOI:
10.1103/physrevlett.102.012502]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2008] [Indexed: 05/27/2023]
Abstract
The structure of neutron-rich isotopes 60Cr and 62Cr was studied via proton inelastic scattering in inverse kinematics. The deformation lengths (delta) for 60Cr and 62Cr were extracted as 1.12(16) and 1.36(14) fm, respectively, providing evidence for enhanced collectivity in these nuclei. An excited state at 1180(10) keV in 62Cr was identified for the first time. We adopted 4;{+} as its spin and parity, leading to the rapid increase of the Ex(4;{+})/E_{x}(2;{+}) ratio, which indicates the development of large deformation in 62Cr near N=40. Importance of the admixture of the gd-shell component above N=40 is also discussed by comparing with a modern shell model calculation.
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