Spectroscopy ofB10Levels from theBe9(d,n)B10Reaction

Levels in ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$ have been studied with the ${}_{}{}^9{}_{}{}^{}\mathrm{Be}\mathrm{}(d,n)\mathrm{}{}_{}{}^{10}{}_{}{}^{}\mathrm{B}$ reaction at 7-, 12-, 15-, and 16-MeV incident energy. Neutron angular distributions for transitions to levels below 7 MeV excitation have been measured with a time-of-flight spectrometer, and they have been compared with distorted-wave Born-approximation (DWBA) calculations. Emphasis has been placed on examining the previously reported discrepancy in the $T=1\mathrm{}$ relative spectroscopic factor ($S_{\mathrm{rel}}$) between ($d,n$) and (${}_{}{}^3{}_{}{}^{}\mathrm{He}$, $d$) reactions. It has been found that the discrepancy still exists though to a lesser degree, and that the $S_{\mathrm{rel}}$ values from ($d,n$) appear to be energy-dependent. Sensitivity of calculations to the choices of deuteron-potential sets as well as of other DWBA parameters has been carefully examined in order to extract reliable spectroscopic factors. It has been found that noncutoff DWBA calculations failed to reproduce the detailed structure of the measured angular distributions beyond stripping peaks when "measured" deuteron-potential parameters were used in the calculations. Also excitation functions have been measured at ${\theta }_{\mathrm{lab}}={15}^{\circ }$ from 14 to 16 MeV in order to check the reaction mechanism for this energy range. The extracted spectroscopic factors compare poorly with the theoretical values of Cohen and Kurath as well as those of Varma and Goldhammer.