Abstract
The mechanism is studied which causes an anomalous magnetic moment of , i.e., too large isoscalar spin for the mirror pair of , from a shell-model viewpoint. Based on the empirically determined shell energies varying from stable to unstable nuclei, the effective shell gap for is evaluated to be rather narrow in a reasonable way. Under this condition, an additional shell quenching by the Thomas-Ehrman effect, arising for only, allows its ground state to be substantially mixed with the intruder configurations. This mirror asymmetry in the mirror wave functions accounts for the obviously large spin expectation value.
- Received 15 January 2004
DOI:https://doi.org/10.1103/PhysRevC.70.011303
©2004 American Physical Society