Abstract
Using time-to-amplitude conversion techniques, the half-life of the 1004-keV level in was found to be ≤ (0.41±0.07) nsec. This upper limit also applies to the 836- and 926-keV levels. The 1004-keV level is depopulated by 168-, 994-, and 1004-keV -ray transitions. Using the corresponding experimental (previously known) branching ratios from this level, the partial half-life of the 994-keV transition, which is of character, is ≤ (0.14±0.03) μsec. The enhancement factor () is ≥7.8. This result is compared with other rates. The half-life of the 168-keV transition of character from the 1004-keV level was found to be ≤ (0.45±0.1) nsec with a resulting enhancement factor of ≥0.45×. The half-life of the 1004-keV transition is ≤ (10.3±0.3) nsec; its character is or , and the resulting enhancement (assuming all ) is ≥1.12×.
- Received 15 July 1966
DOI:https://doi.org/10.1103/PhysRev.161.1254
©1967 American Physical Society