Search for Weak Gamma-Rays of ⁴⁷V

Abstract

The decay of ⁴⁷V has been investigated by using a two-directional focusing beta-ray spectrometer and NaI scintillators (2 in. 3 mm thickness). Two weak gamma-rays of 1.54 and 1.87 MeV have been found and their intensities are 1.4 and 0.9 percent of the positron decay, respectively. The upper limit for 0.16 MeV gamm-ray is 0.08 percent of the positron decay. The maximum energy of the positrons from ⁴⁷V is 1.90±0.04 MeV.