Phys. Rev. Lett. 92, 031101 (2004) [4 pages]Reevaluation of the 22Na(p,γ) Reaction Rate: Implications for the Detection of 22Na Gamma Rays from NovaeReceived 1 April 2003; revised 24 November 2003; published 23 January 2004 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. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.031101
DOI:
10.1103/PhysRevLett.92.031101
PACS:
26.30.+k, 21.10.Tg, 25.40.Lw, 27.30.+t
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