Search for $\alpha$-cluster states in even-even Cr isotopes

Abstract

The $\alpha +\mathrm{core}$ structure is investigated in even-even Cr isotopes from the viewpoint of the local potential model. The comparison of $Q_{\alpha }/A$ values for even-even Cr isotopes and even-even $A=46,54,56,58$ isobars indicates that ${}^{46}$Cr and ${}^{54}$Cr are the most favorable even-even Cr isotopes for $\alpha$-clustering. The ground state bands of the two Cr isotopes are calculated through a local $\alpha +\mathrm{core}$ potential with two variable parameters. The calculated spectra give a very good description of most experimental ${}^{46}$Cr and ${}^{54}$Cr levels. The reduced $\alpha$-widths, rms intercluster separations and $B(E2)$ transition rates are determined for the ground state bands. The calculations reproduce the order of magnitude of the available experimental $B(E2)$ values without using effective charges and indicate that the first members of the ground state bands present a stronger $\alpha$-cluster character. The volume integral per nucleon pair and rms radius obtained for the $\alpha {+}^{50}$Ti potential are consistent with those reported previously in the analysis of $\alpha$ elastic scattering on ${}^{50}$Ti.

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• Shell model study of single-particle and collective structure in neutron-rich Cr isotopes
• Alpha-cluster structure in even-even nuclei around ${}^{94}$Mo
• Large-scale shell-model calculations for unnatural-parity high-spin states in neutron-rich Cr and Fe isotopes
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Cited by in corpus (8)

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• $\alpha$-cluster states in ${}^{46,54}$Cr from double-folding potentials
• Cluster-Daughter Overlap as a New Probe of Alpha-Cluster Formation in Medium-Mass and Heavy Even-Even Nuclei
• Search for the $\alpha$ + core structure in the ground state bands of $22\le Z\le 42$ even-even nuclei
• Existence of higher nodal band states with $\alpha$+${}^{48}$Ca cluster structure in ${}^{52}$Ti
• $\alpha$ + core structure described with an additional interaction in the nuclear matter saturation region
• Signatures of an $\alpha$ + core structure in ${}^{44}$Ti + ${}^{44}$Ti collisions at $\sqrt{s_{NN}}=5.02$ TeV by a multiphase transport model
• Yrast band in the heavy $N=Z$ nucleus ${}^{88}$Ru: $\alpha$-cluster approach