Abstract
The parity violating E1-amplitude for the 6S–7S transition in cesium has been calculated from first principles: 〈7S|D z|6S〉 = (0.88 ± 0.03) × 10 −11 ( −Q W N )(−iea B) , where Q W is the weak nuclear charge, N is the number of neutrons, and a B is The Bohr radius. The experimental data from Bouchiat et al. make it possible to find Q W = −73.4 ± 8.1 ± 6 and the Weinberg angle sin 2 θ W = 0.237 ± 0.036 ± 0.03. To control the accuracy, the energy levels, the fine and hyperfine structure intervals and the oscillator strenghts in the S-P transitions in Cs have been calculated.
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