Phys. Rev. A 62, 022112 (2000) [5 pages]High-precision calculation of the parity-nonconserving amplitude in franciumReceived 6 December 1999; revised 31 March 2000; published 18 July 2000 A high-precision calculation of the 7s-8s parity-nonconserving (PNC) transition amplitude in francium, based on a relativistic all-order method, is presented. Our values for the PNC amplitudes in 223Fr and 210Fr are EPNC=15.41(17) and 14.02(15), respectively, in units 10-11i|e|a0(-QW/N), where QW 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 A=207, 209, 211, and 213. To assess the accuracy of our calculations, we apply the present all-order method to the 6s-7s PNC amplitude in cesium and obtain a result in close agreement with previous high-precision calculations. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.62.022112
DOI:
10.1103/PhysRevA.62.022112
PACS:
32.80.Ys, 31.15.Ar, 31.25.-v
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