G. Davis O'Kelley

Levels in 101Ru populated by the decay of 101Tc

Abstract The decay properties of 14 min 101Tc have been investigated by the use of Ge(Li) and NaI(TI) γ-ray and anthracene β-ray detectors. Coincidence relationships between the γ-rays were determined with the aid of a multiparameter analyzer. Numerous γ-rays (33) could be identified. Two strong β-groups with end-point energies of 1.32 and 1.07 MeV were shown to be in coincidence with 306.7 and 544.7 keV γ-rays, respectively. A decay scheme consistent with the coincidence data is presented, with levels at 127.1, 306.7, 311.2, 422.4, 544.7, 616.1, 720.0, 842.6, 911.1, 928.2 and 918.1 keV. Spin assignments for the excited levels in 101Ru are proposed.

The decay of 8.8 min 49Ca to levels in 49Sc

Abstract The decay of 8.8 min 49Ca was reinvestigated using a 35 cm3 Ge(Li) detector and a scintillation pair spectrometer. Gamma rays were observed with energies (and intensities) of 2229.0 (0.29), 2372.3 (0.45), 3084.4 (100), 4071.9 (8.0), and 4738.2 (0.30) keV. The large log ft values for decay to the 2229.0 and 2372.3 keV states suggest positive parity assignments and identification as s 1 2 and d 3 2 proton hole states.