Empirical Evaluation of Gamow-Teller Strength Function forCl37→Ar37and its Implication in the Cross Section for Solar Neutrino Absorption byCl37

Neutron spectra from ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}$($p$,$n$)${}_{}{}^{37}{}_{}{}^{}\mathrm{Ar}$ at $E_p=120\mathrm{}$ MeV are measured in the angular range 0°-30°. Neutron groups characterized with $L=0\mathrm{}$ transfer are obtained up to approximately 12-MeV excitation energy in ${}_{}{}^{37}{}_{}{}^{}\mathrm{Ar}$. From the observed 0° cross section the Gamow-Teller strengths for ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}$→${}_{}{}^{37}{}_{}{}^{}\mathrm{Ar}$ transitions are obtained which are directly related to neutrino absorption by ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}$. The cross section for ${}_{}{}^8{}_{}{}^{}\mathrm{B}$ solar neutrinos incident on ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}$ is reported.