VERY WEAK GAMMA-TRANSITIONS IN THE EPSILON BETA(+) DECAY OF GA-68 - COMMENT/

Gamma-ray coincidence spectra presented by Vo et al. [Phys. Rev. C 50, 1713 (1994)] may indicate the existence of a positron (ef) transition with a maximum decay energy of (15.9+/-1.2) keV. Possible sources of spurious coincidences, mimicking the ef signal, are discussed and, whe re possible, calculated or estimated. Considerable systematic uncertai nty remains in estimating the noise coincidence rate; hence, the exist ence of this e(+) transition is not established. Another e(+) transiti on with a maximum decay energy of 243 keV has been identified for the first time.