On the asymmetry of Gamow–Teller <f>β</f>-decay rates in mirror nuclei in relation with second-class currents

The theoretical evaluation of major nuclear structure effects on the asymmetry of allowed Gamow–Teller <f>β</f>-decay rates in light mirror nuclei is presented. The calculations are performed within the shell model, using empirical isospin-nonconserving interaction and realistic Woods–Saxon radial wave functions. The revised treatment of <f>p</f>-shell nuclei is supplemented by systematic calculations for <f>sd</f>-shell nuclei and compared to experimental asymmetries when available. The results are important in connection with the possible existence of second-class currents in the weak interaction. [Copyright &y& Elsevier]