Abstract
Two new -emitting isotopes of element 105 with mass numbers 261 and 262 have been discovered. The 8.93-MeV 1.8-sec was produced by the reactions and , and the 8.45-MeV 40-sec by the reaction . The isotopic assignments are based on both -recoil milking and mother-daughter time-correlation measurements. An upper limit of 50% for branching by spontaneous fission was set for . A so far unassigned 25-sec spontaneous-fission activity was observed in the bombardment of with ions.
- Received 26 May 1971
DOI:https://doi.org/10.1103/PhysRevC.4.1850
©1971 American Physical Society