  We use configuration interaction technique to calculate parity
non-conservation (PNC) in metastable Xe and Hg [proposal of the experiment in
L. Bougas et al, Phys. Rev. Lett. 108, 210801 (2012)]. Both, nuclear
spin-independent and nuclear spin-dependent (dominated by the nuclear anapole
moment) parts of the amplitude are considered. The amplitudes are strongly
enhanced by proximity of the states of opposite parity.

Atomic Physics