Astrophysical S factors for the 9Be(p-->,γ)10B reaction

Details Astrophysical S factors for the 9Be(p-->,γ)10B reaction Astrophysical S factors for the 9Be(p-->,γ)10B reaction

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998phrvc..58..517w&link_type=abstract

Physical Review C (Nuclear Physics), Volume 58, Issue 1, July 1998, pp.517-523

Physics

Nuclear Physics

6

Elementary Particle Processes, Radiative Capture, Polarization Phenomena In Reactions, 6<=A<=19

Scientific paper

Analyzing powers for the 9Be(p-->,γ)10B reaction were measured by stopping a 100 keV polarized proton beam in a 9Be target. The measured vector analyzing power is Ay(90°)=0.18+/-0.03 for capture to the ground state, with smaller values at 90° for the first three excited states. Astrophysical S factors were calculated for each of the final states using a direct capture plus resonance model which fit both the present analyzing power data and the previously reported cross section data. The calculated S factors at Ep=0 keV for capture to the ground state and first three excited states were 0.25, 0.34, 0.27, and 0.10 keV b, respectively, which are considerably smaller than previously reported. The observed analyzing powers are explained, within experimental uncertainty, as arising from the interference of the E1 direct capture amplitude with the tails of nearby p-wave and s-wave resonances.

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