BETA+ DECAYS OF CA-37 - IMPLICATIONS FOR THE EFFICIENCY OF THE CL-37 SOLAR V DETECTOR

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