Semiempirical calculations of P-and P, T-odd effects in diatomic molecules- radicals

Abstract

A semiempirical method of computing the matrix elements of the P-and P, T-odd electron-nucleus interaction operators for diatomic molecules-radicals is proposed. The molecular param-eters entering into these matrix elements are extracted from the experimental data on the hyper-fine and Zeeman structures of the electronic ground state of the molecules. The accuracy of such a calculation is comparable to the accuracy of the calculations for the heavy atoms. The numerical results given for the molecules BaF, HgH, and HgF confirm the earlier published estimates for the magnitudes of the P-and P, T-odd effects. Thus, the outlook for the use of diatomic molecules-radicals to study P-and P, T-odd interactions and, in particular, to measure the anapole moments of heavy nuclei is made brighter.