Relativistic coupled-cluster calculations of parity nonconservation in Ba+ by the sum-over-states approach.

The authors present the results of their calculation for the parity nonconserving 5p66s1/2→5p65d3/2 transition in Ba+ using the relativistic coupled-cluster theory in the singles, doubles, and partial triples approximation. The contributions from the leading intermediate states are explicitly considered. It is found that the largest contribution comes from the |5p66p1/2> state. Their results are in reasonable agreement with other calculations. [ABSTRACT FROM AUTHOR]