DECAYS OF ZR-95 AND NB-95

The Zr95→Nb95→Mo95 decay chain has been investigated with a high-resolution 30-cm3 Ge(Li) detector and a Si(Li) detector and 4096-channel analyzer. The following γ rays were observed for a Zr95-Nb95 equilibrium source (energies in keV and intensities in parentheses): 234.70±0.14 (0.34±0.03), 724.23±0.04 (81.0±1.0), 756.74±0.04 (100), and 765.83±0.04 (218.0±3.0). β feedings of (1.0±0.1)%, (44.2±0.5)%, and (54.6±0.5)% were calculated for the 234.7-, 724.2-, and 756.7-keV levels in Nb95. The K-conversion coefficients for the 724.2-, 756.7-, and 765.8-keV γ rays were measured by the NPG method to be (1.56±0.14)×10-3, (1.45±0.15)×10-3, and (1.32±0.13)×10-3, respectively. © 1969 The American Physical Society.