Abstract
In view of the striking implications of the recently measured factors for the states of and we have supplemented this study with similar measurements on . For all three isotopes we utilized the powerful technique of projectile Coulomb excitation in inverse kinematics combined with transient magnetic fields. In contrast to the positive factor values for both , implying large admixtures of particle-hole configurations from core excitations, the factor of , is negative. This result is in very definite disagreement with the large positive value predicted by the large scale shell model (LSSM) calculations which included shell core excitations into the shell and accounted well for corresponding results. The deduced from the remeasured lifetime is indeed substantially smaller than the corresponding value for , again contrary to LSSM predictions. Both and in can be explained by full shell model calculations using the FPD6 interaction without invoking core excitations.
- Received 13 August 2003
DOI:https://doi.org/10.1103/PhysRevC.68.061302
©2003 American Physical Society