Abstract
The ground-state spontaneous-fission half-lives of , , , and were redetermined using solutions of highly enriched uranium in spinner detectors. The following values were obtained: >2.7× years for ; (1.42±0.08)× years for ; (9.8±2.8)× years for ; (2.43±0.13)× years for . The values for and are in agreement with the systematics for spontaneous-fission half-lives of even-even nuclides. The spontaneous-fission of the odd- uranium isotopes 233 and 235 is considerably hindered (hindrance factors >1.3 and 3, respectively).
RADIOACTIVITY, FISSION (sf), (sf), (sf), (sf); measured of sf, spinner detector.
- Received 3 October 1980
DOI:https://doi.org/10.1103/PhysRevC.23.1110
©1981 American Physical Society