Abstract
Electron-capture delayed fission ECDF was studied in the new isotope produced via the (75-MeV α, 7nBk reaction. The half-life of the fission activity was measured to be 144±5 seconds. The mass-yield distribution is predominantly asymmetric and the most probable preneutron emission total kinetic energy of fission is 179±7 MeV. The ECDF mode in was verified by an x-ray-fission coincidence experiment which indicated that the fission lifetime is between about and seconds. The isotope was assigned to through chemical separation and observation of the known 2.4-h daughter activity. No alpha branch was observed in the decay of . The production cross section for is 150±20 nb and the delayed fission probability is (4.8±2)×.
- Received 9 August 1993
DOI:https://doi.org/10.1103/PhysRevC.49.1859
©1994 American Physical Society