High-precision calculation of the parity-nonconserving amplitude in francium

M. S. Safronova and W. R. Johnson
Phys. Rev. A 62, 022112 – Published 18 July 2000
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Abstract

A high-precision calculation of the 7s8s 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 1011i|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 6s7s 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

Authors & Affiliations

M. S. Safronova and W. R. Johnson

  • Department of Physics, Notre Dame University, Notre Dame, Indiana 46556

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Vol. 62, Iss. 2 — August 2000

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