Relativistic coupled-cluster analysis of parity nonconserving amplitudes and related properties of the $6s ~ ^2S_{1/2} - 5d ~ ^2D_{3/2;5/2}$ transitions in $^{133}$Cs

摘要

We present the results of our calculations of the parity nonconservingelectric dipole amplitudes ($E1_{PNC}$) for the $6s ~ ^2S_{1/2} - 5d ~^2D_{3/2;5/2}$ transitions of $^{133}$Cs employing a relativisticcoupled-cluster (RCC) method. $E1_{PNC}$ values for the nuclear spinindependent (NSI) and nuclear spin dependent (NSD) parity non-conservation(PNC) effects for different hyperfine levels of the $6s ~ ^2S_{1/2} - 5d ~^2D_{3/2}$ transition and only due to the NSD PNC interaction Hamiltonian forall possible hyperfine levels of the $6s ~ ^2S_{1/2} - 5d ~ ^2D_{5/2}$transition are given. We have also performed calculations of several propertiesthat are relevant for assessing the reliability of the calculations of theamplitudes of the above mentioned transitions. We highlight the importance ofcorrelation effects by giving the results of both the Dirac-Fock (DF) and RCCcontributions. Approximate contributions to these properties from the Breit andquantum electrodynamics (QED) interactions have also been evaluated. Plausibleexperimental schemes to measure these transition amplitudes by light shifttechniques and interference involving induced Stark shifts are outlined.