Abstract
We measured upper limits for the production of superheavy elements from the compound nucleus reaction Es. This combination permits the closest approach to the predicted island of stability at the 184 closed-neutron shell of any practical fusion reaction. We used aqueous and gas-phase separations to isolate superheavy element fractions within an hour from the end of the bombardments. In these experiments we did not observe superheavy elements above a limit of 3× for spontaneous-fission half-lives from fractions of a day to a few months.
- Received 3 June 1985
DOI:https://doi.org/10.1103/PhysRevC.32.1760
©1985 American Physical Society