Abstract
-ray branches in the decays of , , and have been investigated by measuring the -ray spectra from these activities with a 22-cc Ge(Li) detector. The activities were formed by deuteron bombardment of various targets with a chopped Van de Graaff beam. Previously observed -ray branches to the 8312-and 9052-keV states of were confirmed, the branches being [(5.0±0.6)×; ] and [(3.5±0.5)×; ], respectively, and one new branch was found leading to the 7300-keV state [(0.8±0.2)×; ]. There is also weak evidence for a -ray branch to the 8570-keV state of [≤2.8×; ]. The limit on the branching of to the 871-keV state of is <3.4×, corresponding to . In decay, lifetime measurements have confirmed that a weak 3.3-MeV ray is associated with this activity resulting from a -ray branch to the 4.97-MeV state of [(1.7±0.3)×; ]. From simultaneous measurements on the rays occurring in and decays, the energy of the ray is 3334.3±0.7 keV, and thus level has an energy of 4968.3±0.8 keV.
- Received 27 September 1968
DOI:https://doi.org/10.1103/PhysRev.179.921
©1969 American Physical Society