Observation of substantial p-wave capture strength in the 7Li(p-->,γ)8Be reaction for Ep=80-0 keV and implications for astrophysical S factors

Details Observation of substantial p-wave capture strength in the 7Li(p-->,γ)8Be reaction for Ep=80-0 keV and implications for astrophysical S factors Observation of substantial p-wave capture strength in the 7Li(p-->,γ)8Be reaction for Ep=80-0 keV and implications for astrophysical S factors

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994phrvl..72.3949c&link_type=abstract

Physical Review Letters, Volume 72, Issue 25, June 20, 1994, pp.3949-3952

Astronomy and Astrophysics

Astrophysics

23

Radiative Capture, Polarization Phenomena In Reactions, Elementary Particle Processes

Scientific paper

The 7Li(p-->,γ)8Be reaction has been studied using polarized protons having an incident energy in the range Ep(lab)=80-0 keV. The measured angular distributions of the cross section σ(θ)/A0 and analyzing power Ay(θ) were interpreted using a model independent transition-matrix element analysis. The large (~40%) analyzing power at 90° indicates the presence of an appreciable p-wave capture strength at these energies. The direct capture model is used to show that this could reduce the astrophysical S factor by as much as 40%.

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