alpha decay of Re-159 and proton emission from Ta-155
2007 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 75, no 6, 061302- p.Article in journal (Refereed) Published
The alpha decay of Re-159 has been observed for the first time in reactions of 300 MeV Ni-58 ions with an isotopically enriched Cd-106 target. The Re-159 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(11/2) state in Re-159 with an energy of E-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 Ta-155, which decays by emitting 1444 +/- 15 keV protons with a half-life of 2.9(-1.1)(+1.5) ms. These values are consistent with the emission of the proton from a pi h(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 Ta-155.
Place, publisher, year, edition, pages
2007. Vol. 75, no 6, 061302- p.
IdentifiersURN: urn:nbn:se:kth:diva-37117DOI: 10.1103/PhysRevC.75.061302ISI: 000247625200004ScopusID: 2-s2.0-34547348308OAI: oai:DiVA.org:kth-37117DiVA: diva2:432151