Microscopic analysis of quadrupole collective motion in Cr--Fe nuclei: II. Doorway nature of mixed-symmetry states

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dc.creatorNakada, H.
dc.creatorOtsuka, T.
dc.date1997-03-11
dc.date.accessioned2026-07-07T11:11:07Z
dc.date.available2026-07-07T11:11:07Z
dc.descriptionThe mixed-symmetry collective modes are investigated in Cr-Fe nuclei, by analyzing the realistic shell-model wavefunctions via the H^n-cooling method. It is clarified that the relatively low-lying mixed-symmetry states behave like doorway states. For these nearly spherical nuclei, the lowest mixed-symmetry state is shown to have $J^P=2^+$. An indication of the mixed-symmetry 3^+ state is obtained. The sequence of the mixed-symmetry 2^+, 1^+ and 3^+ levels and its nucleus-dependence are discussed. Calculated M1 and M3 transitions in the low-energy region suggest that the mixed-symmetry 1^+ and 3^+ components are detectable. We investigate the B(M1) distribution in a wider energy range, without breaking the isospin quantum number. It is confirmed that the mixed-symmetry 1^+ component is well separated from the peak of the spin excitation. The isospin-raising component has a peak, separated well from the isospin-conserving one. The orbital angular-momentum contributes destructively to the spin excitations.
dc.descriptionRevtex 24 pages & 8 EPS figures, to appear in Phys. Rev. C
dc.identifierhttps://arxiv.org/abs/nucl-th/9703021
dc.identifierhttp://arxiv.org/abs/nucl-th/9703021
dc.identifierPhys.Rev.C55:2418-2426,1997
dc.identifierdoi:10.1103/PhysRevC.55.2418
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190988
dc.subjectNuclear Theory
dc.titleMicroscopic analysis of quadrupole collective motion in Cr--Fe nuclei: II. Doorway nature of mixed-symmetry states
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