Relativistic many-body calculations in atoms and parity violation in caesium

摘要: It is shown that the use of relativistic Hartree-Fock equations in an external field, Brueckner orbitals and many-body perturbation theory provides, as a rule, accuracy to 1-3% atomic calculations. To control accuracy, energy levels fine hyperfine structure intervals well E1 amplitudes for s-p transitions Cs have been calculated. The parity-violating amplitude 6s-7s transition has found: (7s mod Dz 6s)=(0.88+or-0.03)*10-11(-Qw/N)(-ieaB), where Qw weak charge nucleus N number neutrons. Previous experimental data make it possible find nuclear 133Cs, QW=-73.4+or-8.1+or-6, Weinberg angle sin2 theta w=0.237+or-0.036+or-0.03.