Effective moments in k 39 and k 40

Abstract

It is pointed out that by comparing magnetic moments of levels belonging to the same nucleon configuration in an add-odd nucleus, or MI transitions between suchlevels, an important information on the effective moments of found nucleons can be obtained. This analysis is carried out for K 40 and the results agree very well with the magnetic moment of K 39. An atempt is made to include the effects of configuration mixing in K 40, induced by the residual proton-neutron interaction. A δ-type interaction which reproduces the spectrum of Cl 88 is assumed. The resulting agreement is considerably deteriorated, indicating that such an admixture of configurations is probably negligible in K 40. Further experiments are suggested to check the validity of the concept of an effective moment.