Gamma Rays from the Decay ofGe75andGe77

Abstract

$\gamma$ spectra from the decay of 82.2-min ${}_{}{}^{75}{}_{}{}^{}\mathrm{Ge}$ and 11.3-h ${}_{}{}^{77}{}_{}{}^{}\mathrm{Ge}$ have been studied with several sizes of high-resolution Ge(Li) detectors by singles and coincidence methods. Energies and relative intensities of 7 transitions in the decay of ${}_{}{}^{75}{}_{}{}^{}\mathrm{Ge}$ and 67 transitions in ${}_{}{}^{77}{}_{}{}^{}\mathrm{Ge}$ decay have been determined. The transitions in the decay of ${}_{}{}^{75}{}_{}{}^{}\mathrm{Ge}$ are placed in a level scheme of ${}_{}{}^{75}{}_{}{}^{}\mathrm{As}$ consisting of levels at 199.2, 264.7, 468.7, and 617.8 keV. All 67 transitions in the ${}_{}{}^{77}{}_{}{}^{}\mathrm{Ge}$ decay are placed in a level scheme of ${}_{}{}^{77}{}_{}{}^{}\mathrm{As}$ with levels at 215.6, 264.4, 475.4, 632.0, 634, 795.6, 1077.4, 1094.0, 1190.3, 1214.9, 1319.7, 1339.0, 1378.2, 1384, 1399.5, 1458.3, 1494.7, 1528.4, 1539.2, 1560.8, 1573.3, 1863.9, 2000.3, 2104.9, 2110.9, 2202.2, 2244.8, 2301.7, 2342.0, 2353.4, 2436.6, and 2513.6 keV.