{alpha} decay studies of the nuclides {sup 218}U and {sup 219}U
- Department of Physics, University of Jyvaeskylae, P. O. Box 35, FI-40014 Jyvaeskylae (Finland)
- Department of Physics, University of Copenhagen, Copenhagen (Denmark)
Very neutron deficient uranium isotopes were produced in fusion evaporation reactions using {sup 40}Ar ions on {sup 182}W targets. The gas-filled recoil separator RITU was employed to collect the fusion products and to separate them from the scattered beam and other reaction products. The activities were implanted into a position sensitive silicon detector after passing through a gas-counter system. The isotopes were identified using spatial and time correlations between the implants and the decays. Two {alpha}-decaying states, with E{sub {alpha}}=(8612{+-}9) keV and T{sub 1/2}=(0.51{sub -0.10}{sup +0.17}) ms for the ground state and E{sub {alpha}}=(10678{+-}17) keV and T{sub 1/2}=(0.56{sub -0.14}{sup +0.26}) ms for an isomeric state, were identified in {sup 218}U. In addition, the half-life and {alpha}-decay energy of {sup 219}U were measured with improved precision. The measured decay properties deduced for {sup 218}U suggest that there is no subshell closure at Z=92.
- OSTI ID:
- 20995269
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 75, Issue 5; Other Information: DOI: 10.1103/PhysRevC.75.054307; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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