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Reevaluation of the 22Na(p,gamma) Reaction Rate: Implications for the Detection of 22Na Gamma Rays from Novae

Jenkins, D.G., Lister, C.J., Janssens, R.V.F., Khoo, T.L., Moore, E.F., Rehm, K.E., Truett, B., Wuosmaa, A.H., Freer, M., Fulton, B.R. and José, J. (2004) Reevaluation of the 22Na(p,gamma) Reaction Rate: Implications for the Detection of 22Na Gamma Rays from Novae. Physical Review Letters, 92 (3). 031101-1. ISSN 1079-7114

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Abstract

Understanding the processes which create and destroy 22Na is important for diagnosing classical nova outbursts. Conventional 22Na(p,γ) studies are complicated by the need to employ radioactive targets. In contrast, we have formed the particle-unbound states of interest through the heavy-ion fusion reaction, 12C(12C,n)23Mg and used the Gammasphere array to investigate their radiative decay branches. Detailed spectroscopy was possible and the 22Na(p,γ) reaction rate has been reevaluated. New hydrodynamical calculations incorporating the upper and lower limits on the new rate suggest a reduction in the yield of 22Na with respect to previous estimates, implying a reduction in the maximum detectability distance for 22Na γ rays from novae.

Item Type: Article
Institution: The University of York
Academic Units: The University of York > Physics (York)
Depositing User: York RAE Import
Date Deposited: 30 Mar 2009 18:20
Last Modified: 30 Mar 2009 18:20
Published Version: http://dx.doi.org/10.1103/PhysRevLett.92.031101
Status: Published
Publisher: The American Physical Society.
Identification Number: 10.1103/PhysRevLett.92.031101
URI: http://eprints.whiterose.ac.uk/id/eprint/7289

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