Abstract
The parity- and partially isospin-forbidden α 0-decay from O ∗ ( J π = 2 −, T = 1; E x = 12.9686 MeV) to 12C(g.s.) has been thoroughly investigated theoretically. Considering various strong and weak interaction models, the longitudinal A L and the irregular transverse A b analyzing powers of the reaction 15 N( p , α 0) 12 C have been calculated in the energy range around the 2 − resonance in 16O ∗. The isospin impurity due to the coupling with 2 −, E x = 12.53 MeV excited level in 16O ∗, which has mainly a T = 0 component, have been considered in the calculations. Energy anomalies for the expected interference effects, relevant for the experiments, have been found to be A L ≈ 2.0×10 −5 and A b ≈ 0.4×10 −5.
Published Version
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