Physics
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..529..442w&link_type=abstract
CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS: 10th International Symposium. AIP Conference Proceedings, Volume 529, pp. 44
Physics
Radiative Capture, Elementary Particle Processes, A<=5, 6<=A<=19
Scientific paper
The availability of intense polarized proton and deuteron beams from the new generation of polarized ion-sources, as well as significant improvements in target and detector technologies, has made it possible to make detailed studies of radiative-capture reactions below 80 keV. It will be shown that polarization data provide important information on the relative phases of interfering amplitudes. Knowledge of these phases along with low energy cross section data lead to much more reliable extrapolated values of the Astrophysical S-factors. Reactions which we have studied or are presently studying include: D(p,γ)3He, p(d,γ)3He, D(d,γ)4He, T(p,γ)4He, 7Li(p,γ)8Be, 9Be(p,γ)10B, 11B(p,γ)12C, and 14N(p,γ)15O. The extrapolated values of the S-factors which we obtain differ in all cases from previous values by factors which range from 35 down to a factor of 0.67. These S-factors will be presented along with a discussion of the underlying nuclear physics effects which are responsible for these changes. .
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