THE 85 MINUTE ACTIVITY OF Ba$sup 13$$sup 9$
The decay scheme of Ba/sup 139/ was studied using scintillation detectors. The half-life was found to be 85 plus or minus 3 min. Beta-gamma and gamma-gamma coincidence measuremeats showed this decay to consist of three beta groups of two excited states of La/sup 139/, the energies of the excited states being 0.167 plus or minus 0.003 and l.43 plus or minus 0.05 Mev. Transitions from these two states were to the ground state. Branching ratios of 0.72, 0.26, and 0.02 were found for the 2.38, 2.23, and 0.95 Mev beta groups, respectively. Betagamma delayed coincidence measurements made on the 0.167 Mev state showed the half-life of thin state to be 1.7 plus or minus 0.2 ns. (auth)
- Research Organization:
- Michigan State Univ., East Lansing
- NSA Number:
- NSA-15-000937
- OSTI ID:
- 4147779
- Journal Information:
- Nuclear Phys., Journal Name: Nuclear Phys. Vol. Vol: 19
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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