Calculation of parity non-conservation in thallium

Abstract

Parity non-conserving (PNC) E1 amplitudes for 205Tl are calculated. In units of 10-10 (i mod e mod aBQw/-N) (Qw is the weak charge of the nucleus, N is the number of neutrons) the authors find that (6p3/2 1/2 mod Dz mod 6p1/2 1/2)=-2.70(1+or-0.03) and (7p1/2 1/2 mod Dz mod 6p1/2 1/2)=-0.79(1+or-0.06). Using the technique developed the authors recalculate the PNC E1 amplitude for 133Cs, finding, with a high degree of accuracy, that (7s 1/2 mod Dz mod 6s 1/2)=0.090(1+or-0.02). They also calculate the PNC E1 amplitude for 85Rb, obtaining (6s 1/2 mod Dz mod 5s 1/2)=0.0139(1+or-0.02). For the calculation they use the time-dependent Hartree-Fock method as the first approximation and then take into account all the correlation corrections of second order in the residual Coulomb interaction.