beta. sup + decays of sup 37 Ca: Implications for the efficiency of the sup 37 Cl solar. nu. detector

We studied {sup 37}Ca {beta}{sup +} decays using a mass separated {sup 37}Ca beam and a proton telescope with 16-keV resolution. Delayed {ital p}'s were detected in coincidence with {gamma}'s to identify {ital p} decays of {sup 37}K daughter levels to excited states of {sup 36}Ar. We observed 43 previously undetected proton groups, yielding an integrated {ital B}({ital GT}) twice as large as that observed previously. Although our result increases the efficiency of the {sup 37}Cl detector for counting solar {nu}'s by 6%, its main effect is to reduce uncertainties in this efficiency arising from discrepancies between previous {sup 37}Ca {beta} decay and {sup 37}Cl({ital p},{ital n}) results.