%0 Journal Article
%T Electron correlation and nuclear charge dependence of parity-violating properties in open-shell diatomic molecules
%A T. A. Isaev
%A R. Berger
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevA.86.062515
%X The scaling of nuclear spin-dependent parity violating effects with increasing nuclear charge $Z$ is discussed in two series of isovalent open-shell diatomic molecules. The parameter $W_\mathrm{a}$ characterising the strength of parity violation in diatomic molecules is calculated in the framework of the zeroth-order regular approximation (ZORA) and found to be in good agreement with the $R(Z) Z^k$ scaling law derived for atoms in which $R(Z)$ represents a relativistic enhancement factor. The influence of electron correlation is studied on the molecular level, with spin-polarisation effects being conveniently accounted for by a previously established approximate relation between the hyperfine coupling tensor and $W_\mathrm{a}$. For high accuracy predictions of parity violating effects in radium fluoride the necessity for systematically improvable correlation calculations is emphasised.
%U http://arxiv.org/abs/1206.6013v2