Cl37solar neutrino capture cross section

We argue that the standard derivation of the Gamow-Teller contribution to the ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}$ solar neutrino capture cross section from the ${}_{}{}^{37}{}_{}{}^{}\mathrm{Ca}$ delayed proton spectrum yields a B(GT) distribution that is too weak and shifted to lower excitation energies. Because the redistribution of Gamow-Teller strength occurs primarily above the analog state, where the neutrino reaction phase space is small, it has only a small effect (4%) on the solar neutrino cross section. However, our observations help resolve the discrepancy between the ${}_{}{}^{37}{}_{}{}^{}\mathrm{Ca}$ β-decay and ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}$(p,n) Gamow-Teller mappings.