A method of model-independent spin-parity determination is proposed for the ${(d,}^2\mathrm{He})$ reaction by using the tensor analyzing power $A_{\mathrm{zz}}$ at $\theta =0\mathrm{}°,$ which shows extreme values for $0^{-}$ and natural-parity states solely by parity conservation. It is applied to the ${}^{12}\mathrm{C}{(d,}^2\mathrm{He}{)}^{12}\mathrm{B}$ reaction at $E_d=270\mathrm{}\mathrm{MeV}$ and a possible indication of $0^{-}$ state is found at $E_x=9.3\mathrm{}\mathrm{MeV}$ in ${}^{12}\mathrm{B}.$ The bump at $E_x=7.5\mathrm{}\mathrm{MeV}$ appears to have more $2^{-}$ strength than $1^{-}$ strength at $\theta \sim 0°,$ consistent with our earlier work.

• Received 25 May 2002

DOI:https://doi.org/10.1103/PhysRevC.66.054602