Abstract
The spin-parity J π of the spin dipole resonances (SDR) in 12N and 12B are investigated via the measurements of polarization observables, the transverse polarization transfer conefficient D NN for the ( p , n ) reaction at 197 and 295 MeV and the tensor analyzing power A xx for the ( d, 2 He ) reaction at 270 MeV. The polarization observables, D NN and A xx for the peak at 4.5 MeV are consistent with the DWIA prediction with 2 − but those for the peak at 7.5 MeV contradict the predictions with an expected J π = 1 −. Neither polarization observables could detect any concentration of 0 − strength. The usefulness of these spin observables in identifying J π is shown.
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