{alpha} decay of {sup 159}Re and proton emission from {sup 155}Ta
- Oliver Lodge Laboratory, Department of Physics, University of Liverpool, Liverpool, L69 7ZE (United Kingdom)
- Department of Physics, University of Jyvaeskylae, P.O. Box 35, FIN-40014, Jyvaeskylae (Finland)
The {alpha} decay of {sup 159}Re has been observed for the first time in reactions of 300 MeV {sup 58}Ni ions with an isotopically enriched {sup 106}Cd target. The {sup 159}Re ions were separated in-flight using the RITU separator and implanted into the GREAT spectrometer. The {alpha} decay emanates from the proton-emitting {pi}h{sub 11/2} state in {sup 159}Re with an energy of E{sub {alpha}}=6776{+-}26 keV and a branching ratio of 7.5 {+-} 3.5%. This {alpha} decay populates a state in the closed neutron shell nucleus {sup 155}Ta, which decays by emitting 1444 {+-} 15 keV protons with a half-life of 2.9{sub -1.1}{sup +1.5} ms. These values are consistent with the emission of the proton from a {pi}h{sub 11/2} orbital. These results fit in with the systematics of proton and {alpha}-particle separation energies in the region, but disagree with the previously reported decay properties of {sup 155}Ta.
- OSTI ID:
- 21003443
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 75, Issue 6; Other Information: DOI: 10.1103/PhysRevC.75.061302; (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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