Parity nonconservation in 10 B nucleus

The γ-circular polarization (Pγ) and asymmetries (Aγ) of the parity forbidden M1 + E2 γ - decays: 10 B* (Jπ = 2- T 0; Ex = 5.11 MeV) → 10 B* (Jπ = 1+ T = 0; Ex = 0.72 MeV) as well as the PNC analyzing power for 9 Be(p vector,α)6 Li resonance rection populating the parity (2±) doublet at 7.47 MeV have been investigated theoretically. We use the recently proposed Warburton-Brown shell model interaction. For the weak forces we discuss comparatively different weak interaction models based on different assumptions for evaluating the weak meson-hadron coupling constants. The results determine a range of Pγ - values for which we find the most probable values: Pγ = 3.7 · 10-4 for the 5.11 MeV doublet and AL(b) ∼ 0.6 · 10-5 for the 7.47 MeV doublet. These cases seem to be promising for further experimental tests of parity nonconservation in nuclei. (authors)