Reactions in theB8andLi8compound systems

Abstract

Calculations are reported for reactions in the $^{8}\mathrm{B}$ and $^{8}\mathrm{Li}$ compound systems with the recoil corrected continuum shell model. Comparison with observed structure indicates that the spin-orbit component of the M3Y interaction must be modified near the middle of the p shell. Calculations are performed with three spin-orbit strengths. The prediction for $^{7}\mathrm{Be}$($p,\ensuremath{\gamma})$$^{8}\mathrm{B}$, based on this model and available data, is that ${S}_{17}$(0) equals 21.63 eV b and ${S}_{17}$(20) 21.02 eV b. Calculations for $^{7}\mathrm{Li}$($n,\ensuremath{\gamma})$$^{8}\mathrm{Li}$ indicate that the $^{8}\mathrm{Li}$, ${1}_{2}^{+}$ state is nearly degenerate with the ${3}^{+}$ state. It is shown that a measurement of $^{7}\mathrm{Li}$($n,\ensuremath{\gamma})$$^{8}\mathrm{Li}$(${1}_{1}^{+})$ can locate the ${0}^{+}$ state. It is also shown that $^{7}\mathrm{Be}$($p,{p}^{'})$$^{7}\mathrm{Be}$(${1/2}^{\ensuremath{-}}$) can locate the ${1}^{+}$ and ${0}^{+}$ strength in $^{8}\mathrm{B}$.