First proton-transfer study of 18F+p resonances relevant for novae

Details First proton-transfer study of 18F+p resonances relevant for novae First proton-transfer study of 18F+p resonances relevant for novae

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011phrvc..83e2801a&link_type=abstract

Physical Review C, vol. 83, Issue 5, id. 052801

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3

6<=A<=19, Transfer Reactions, Reactions Induced By Unstable Nuclei, Nucleosynthesis In Novae, Supernovae, And Other Explosive Environments

Scientific paper

The 18F(p,α)15O reaction is the predominant destruction mechanism in novae of the radionuclide F18, a target of γ-ray observatories. Thus, its rate is important for understanding F18 production in novae. We have studied resonances in the 18F+p system by making a measurement of a proton-transfer reaction 18F(d,n). We have observed 15 Ne19 levels, 5 of which are below the proton threshold, including a subthreshold state, which has significant lp=0 strength. Our data provide a direct determination of the spectroscopic strength of these states and new constraints on their spins and parities, thereby resolving a controversy, which involves the 8- and 38-keV resonances. The 18F(p,α)15O reaction rate is reevaluated, which takes the subthreshold resonance and other new information determined in this experiment into account.

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