Physics – Nuclear Physics
Scientific paper
Oct 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aps..dnp1wa002p&link_type=abstract
American Physical Society, Division of Nuclear Physics Annual Meeting, October 25-28, 2006, abstract #1WA.002
Physics
Nuclear Physics
Scientific paper
The decay of ^17F, which is produced in novae by proton capture on ^16 O, is possibly the dominant Galactic source of ^17 O. However, ^17F is destroyed by the ^ 17F(p,γ)^18Ne reaction. This reaction rate is unknown in novae environments, and is important for understanding the production of ^17 O and ^18F. At typical novae temperatures, the ^17F(p,γ)^18Ne rate is dominated by direct capture (DC) to bound states in ^ 18Ne, which is currently unmeasured due to the significant experimental challenges in performing the direct measurement. However, DC cross sections can be reliably calculated from Asymptotic Normalization Coefficients (ANCs) determined by, for example, a peripheral transfer reaction. We have measured the ^14N(^17F,^18Ne)^ 13 C reaction, in order to determine ^17F + p ANCs, utilizing a 170 MeV beam of ^17F incident on a melamine (C3N6H6) target at the Holified Radioactive Ion Beam Facility at ORNL. Charged particles were detected in a pair of resistive strip silicon detector telescopes. Due to insufficient resolution to separate states in ^18Ne by charged particle detection alone, coincident de-excitation γ rays were measured in coincidence using the CLARION array. Details of the motivation, experiment, analysis and preliminary results will be presented.
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