Shell model study of single-particle and collective structure in neutron-rich Cr isotopes

Abstract

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 ${}^{52-62}$Cr and odd-mass ${}^{53-59}$Cr nuclei, and predict a lowering of excitation energies around neutron number N=40. The calculated $B(E2;2_1^{+}\to 0_1^{+})$ 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 $9/2_1^{+}$ energy in ${}^{59}$Cr and the appearance of very low $0_2^{+}$ states around N=40 are discussed. We also predict a new band with strong collectivity built on the $0_2^{+}$ state in the N=40 isotope ${}^{64}$Cr.

11 pages, 14 figures, accepted in Phys. Rev. C

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Cited by in corpus (18)

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• Towards a unified realistic shell-model Hamiltonian with the monopole-based universal force
• Shape changes and large-amplitude collective dynamics in neutron-rich Cr isotopes
• Large-scale shell-model calculations for unnatural-parity high-spin states in neutron-rich Cr and Fe isotopes
• Occupation numbers of spherical orbits in self-consistent beyond-mean-field methods
• Rotation alignment in neutron-rich Cr isotopes: A probe of deformed single-particle levels across N=40
• Large scale shell model calculations for odd-odd ${}^{58-62}$Mn isotopes
• Beta-decay of Mn-65 to Fe-65
• Search for $\alpha$-cluster states in even-even Cr isotopes
• Shell-model results in $fp$ and $fp{g}_{9/2}$ spaces for ${}^{61,63,65}$Co isotopes
• Shell model results for ${}^{47-58}$Ca isotopes in the $fp$, $fp{g}_{9/2}$ and $fp{g}_{9/2}{d}_{5/2}$ model spaces
• Nuclear Structure Properties of even-even Chromium Isotopes and the E ect of Deformation on Calculated Electron Capture Cross Sections
• Nuclear structure study around Z=28
• Shell model description of Ge isotopes
• Structure of odd Ge isotopes with $40<N<50$
• Structure of odd ${}^{79,81,83}$Se isotopes with proton and neutron excitations across $Z=28$ AND $N=40$