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alpha decay of Re-159 and proton emission from Ta-155

Page, RD, Bianco, L, Darby, IG, Uusitalo, J, Joss, DT, Grahn, T, Herzberg, R-D, Pakarinen, J, Thomson, J, Eeckhaudt, S, Greenlees, PT, Jones, PM, Julin, R, Juutinen, S, Ketelhut, S, Leino, M, Leppanen, A-P, Nyman, M, Rahkila, P, Saren, J, Scholey, C, Steer, A, Hornillos, MBG, Al-Khalili, JS, Cannon, AJ, Stevenson, PD, Erturk, S, Gall, B, Hadinia, B, Venhart, M and Simpson, J (2007) alpha decay of Re-159 and proton emission from Ta-155 PHYSICAL REVIEW C, 75 (6). ? - ?. ISSN 0556-2813


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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.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Physical Sciences, Physics, Nuclear, Physics, N = 82, NEUTRON-DEFICIENT ISOTOPES, DRIP-LINE, NUCLEI, RADIOACTIVITY, HF-154, LU-153, LIMIT
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Divisions: Faculty of Engineering and Physical Sciences > Physics
Depositing User: Mr Adam Field
Date Deposited: 27 May 2010 14:06
Last Modified: 23 Sep 2013 18:26

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