Energy Levels ofBr81Populated by the Decay ofSe81mandSe81
- 20 May 1967
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 157 (4), 995-1000
- https://doi.org/10.1103/physrev.157.995
Abstract
The rays following the decay of ( min) and ( min) were investigated using a Ge(Li) detector, a coincidence apparatus, and a high-pressure gas proportional counter. and were produced by neutron bombardment of 94.4% enriched and natural selenium. Nine rays have been identified as belonging to the decay of and by using the Ge(Li) detector. The energies (in keV) and relative intensities (in brackets) of these rays are as follows. : 103.3±0.2 (100) and 1146±2 (3.4±0.6). : 276.3±0.4 (100), 290.2±0.4 (79.6±5.6), 538.7±0.7 (6.2±0.7), 552.7±0.7 (12.8±1.4), 566.1±0.7 (28.9±2.6), 650.4±0.9 (2.6±0.4), and 829.2±0.8 (36.6±2.6). A ray of energy 180±2 keV (relative intensity=0.94±0.19) has also been attributed to through coincidence measurements. An energy-level scheme of populated by the decay of and has been proposed by introducing levels at 276, 566, 650, 815, 829, and 1146 keV. The 1146-keV level is fed by a direct decay of with a transition intensity of (0.34±0.13)%. The -decay transition intensities of to the 0-, 566-, 650-, 815-, and 829-keV levels of were computed to be (98.8±0.33)%, (0.76±0.21)%, (0.014±0.006)%, (0.042±0.013)%, and (0.36±0.10)%, respectively.
Keywords
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