Search for nonresonant capture in the 16O(α,γ)20Ne reaction at low energies

Details Search for nonresonant capture in the 16O(α,γ)20Ne reaction at low energies Search for nonresonant capture in the 16O(α,γ)20Ne reaction at low energies

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phrvc..36..892h&link_type=abstract

Physical Review C (Nuclear Physics), Volume 36, Issue 3, September 1987, pp.892-898

Physics

Nuclear Physics

12

3H-, 3He-, And 4He-Induced Reactions, Elementary Particle Processes

Scientific paper

20Ne recoils produced from the 16O(α,γ) 20Ne reaction were detected in coincidence with capture γ rays using a recoil separator, NaI(Tl) γ-ray detectors, and a helium gas target. Total cross sections for cascade and ground state capture were measured in the range Ec.m.=1.7-2.35 MeV. Improved measurements of the total width and resonance strength of the Ec.m.=1.99 MeV (Jπ=0+) resonance and the resonance strength of the Ec.m.=1.054 MeV (Jπ=1-) resonance are reported. The astrophysical S factor for nonresonant capture into the 20Ne ground state was measured to be 0.26+/-0.07 MeV b, assuming an energy-independent S factor between Ec.m.=1.7 and 2.35 MeV. Using theoretical estimates for the energy dependence and branching ratios for the nonresonant capture, a best estimate for the total S factor at 300 keV of 0.7+/-0.3 MeV b is determined.

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