Abstract
A high-precision calculation of the parity-nonconserving (PNC) transition amplitude in francium, based on a relativistic all-order method, is presented. Our values for the PNC amplitudes in and are and respectively, in units where is the weak charge and N is the neutron number. Spin-dependent contributions to the PNC amplitude are calculated for Fr isotopes with nucleon numbers 209, 211, and 213. To assess the accuracy of our calculations, we apply the present all-order method to the PNC amplitude in cesium and obtain a result in close agreement with previous high-precision calculations.
- Received 6 December 1999
DOI:https://doi.org/10.1103/PhysRevA.62.022112
©2000 American Physical Society