Shell model study of single-particle and collective structure in neutron-rich Cr isotopes
Shell model study of single-particle and collective structure in neutron-rich Cr isotopes
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DOI：
10.1103/physrevc.78.064312
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发表时间：
2008-12
影响因子：
3.1
通讯作者：
K. Kaneko;Y. Sun;M. Hasegawa;T. Mizusaki
中科院分区：
文献类型：
--
作者：
K. Kaneko;Y. Sun;M. Hasegawa;T. Mizusaki
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 {sup 52-62}Cr and odd-mass {sup 53-59}Cr nuclei, and predict a lowering of excitation energies around neutron number N=40. The calculated B(E2;2{sub 1}{sup +}{yields}0{sub 1}{sup +}) 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 9/2{sub 1}{sup +} energy in {sup 59}Cr and the appearance of very low 0{sub 2}{sup +} states around N=40 are discussed. We also predict a new band with strong collectivity built on the 0{sub 2}{sup +} state in the N=40 isotope {sup 64}Cr.
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 {sup 52-62}Cr and odd-mass {sup 53-59}Cr nuclei, and predict a lowering of excitation energies around neutron number N=40. The calculated B(E2;2{sub 1}{sup +}{yields}0{sub 1}{sup +}) 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 9/2{sub 1}{sup +} energy in {sup 59}Cr and the appearance of very low 0{sub 2}{sup +} states around N=40 are discussed. We also predict a new band with strong collectivity built on the 0{sub 2}{sup +} state in the N=40 isotope {sup 64}Cr.