Nuclear spectroscopy with theNi62(Li7,He6)Cu63reaction

The levels of ${}_{}{}^{63}{}_{}{}^{}\mathrm{Cu}$ with $E_x\le 2.51$ MeV have been studied with the ${}_{}{}^{62}{}_{}{}^{}\mathrm{Ni}$(${}_{}{}^7{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^6{}_{}{}^{}\mathrm{He}$)${}_{}{}^{63}{}_{}{}^{}\mathrm{Cu}$ reaction at $E\left({}_{}{}^7{}_{}{}^{}\mathrm{Li}\right)=34\mathrm{}$ MeV to test the usefulness of this reaction as a spectroscopic tool. Elastic scattering data were taken for the ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$ + ${}_{}{}^{62}{}_{}{}^{}\mathrm{Ni}$ and ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ + ${}_{}{}^{63}{}_{}{}^{}\mathrm{Cu}$ systems and optical model parameters were extracted so that finite range distorted-wave Born-approximation (DWBA) calculations could be performed. The DWBA differential cross sections well reproduce the shapes of the data. The absolute spectroscopic factors are in excellent over-all agreement with previously published light-ion studies, indicating that the extracted ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$ optical parameters are a reasonable approximation for the ${}_{}{}^6{}_{}{}^{}\mathrm{He}$ optical parameters and that the ${}_{}{}^7{}_{}{}^{}\mathrm{Li}\to {}_{}{}^6{}_{}{}^{}\mathrm{He}+p$ spectroscopic factor is in good agreement with the theoretical value of Cohen and Kurath. In addition, this reaction permits a clear distinction between $p_{\frac{3}{2}}$ and $p_{\frac{1}{2}}$ final-state configurations when very forward angle data are taken.