Phys. Rev. C 78, 064312 (2008) [9 pages]Shell model study of single-particle and collective structure in neutron-rich Cr isotopesReceived 8 July 2008; published 18 December 2008 The structure of neutron-rich Cr isotopes is systematically investigated by using the spherical shell model. The calculations reproduce well the known energy levels for the even-even 52-62Cr and odd-mass 53-59Cr nuclei, and predict a lowering of excitation energies around neutron number N=40. The calculated B(E2;21+→01+) systematics shows a pronounced collectivity around N=40; a similar characteristic behavior has been suggested for Zn and Ge isotopes. Causes for the sudden drop of the 9/21+ energy in 59Cr and the appearance of very low 02+ states around N=40 are discussed. We also predict a new band with strong collectivity built on the 02+ state in the N=40 isotope 64Cr. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.78.064312
DOI:
10.1103/PhysRevC.78.064312
PACS:
21.10.Dr, 21.60.Cs, 21.10.Re, 27.40.+z
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