Abstract
Angular distributions of the analyzing powers and for at keV and the angular distribution of the analyzing power for at keV have been measured for the first time. In addition, absolute differential cross sections for proton-deuteron capture have been determined for 75, 108, 133, and 173 keV. Thick ice or heavy ice targets and two large-volume, high-purity Ge -ray detectors were used. Results are in general agreement with an exact three-body calculation utilizing a realistic nucleon-nucleon potential. The vector-polarization observables are found to be especially sensitive to meson-exchange-current effects. The extracted value for proton-deuteron capture is lower than that presently used in astrophysical calculations. An expression for the thermonuclear reaction rate below 10 GK is given.
- Received 30 August 1996
DOI:https://doi.org/10.1103/PhysRevC.55.588
©1997 American Physical Society