In-beam γ-ray spectroscopy at the proton dripline: 23Al
Gade, A, Adrich, P, Bazin, D, Bowen, MD, Brown, BA, Campbell, CM, Cook, JM, Glasmacher, T, Hosier, K, McDaniel, S, McGlinchery, D, Obertelli, A, Riley, LA, Siwek, K, Tostevin, JA and Weisshaar, D (2008) In-beam γ-ray spectroscopy at the proton dripline: 23Al Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 666 (3). 218 - 221. ISSN 0370-2693
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Official URL: http://dx.doi.org/10.1016/j.physletb.2008.07.062
We report on the first in-beam γ-ray spectroscopy of 23Al using two different reactions at intermediate beam energies: inelastic scattering off 9Be and heavy-ion induced one-proton pickup, 9Be(22Mg,23Al+γ)X, at 75.1 MeV/nucleon. A γ-ray transition at 1616(8) keV—exceeding the proton separation energy by 1494 keV—was observed in both reactions. From shell model and proton decay calculations we argue that this γ-ray decay proceeds from the core-excited 7/2+ state to the 5/2+ ground state of 23Al. The proposed nature of this state, [22Mg, is consistent with the presence of a γ-branch and with the population of this state in the two reactions.
|Divisions:||Faculty of Engineering and Physical Sciences > Physics|
|Deposited By:||Symplectic Elements|
|Deposited On:||24 Oct 2011 10:25|
|Last Modified:||15 May 2013 14:36|
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