Low-energy polarized-proton capture on {sup 6}Li
- Department of Physics, Duke University, Durham, North Carolina 27708 (United States)
We have measured the thick-target yield and analyzing power for the {sup 6}Li({ital p}{searrow},{gamma}) reaction to the ground and first excited state of {sup 7}Be below {ital E}{sub {ital p}}=80 keV. High-purity-germanium detectors were used to acquire data at five angles from {theta}=0{degree} to 124{degree}. For both states the yield, integrated from the beam energy of 80 keV down to 0 keV, is nearly isotropic and the integrated analyzing power shows only small deviations from zero. This is taken as an indication that, unlike the case of the {sup 7}Li({ital p}{searrow},{gamma}{sub 0}){sup 8}Be reaction, the {ital p}-wave-capture process is unimportant compared to the {ital s}-wave process. Transition-matrix-element analyses of the ground-state data yield {ital p}-wave contributions of a few percent. Under the assumption of a constant astrophysical {ital S} factor, consistent with direct {ital s}-wave capture, a value of {ital S}=(2.69{plus_minus}0.54){times}10{sup {minus}5} MeV b has been deduced. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Duke Univ., Durham, NC (United States)
- DOE Contract Number:
- FG05-91ER40619; FG05-95ER40902
- OSTI ID:
- 282914
- Journal Information:
- Physical Review, C, Vol. 53, Issue 4; Other Information: PBD: Apr 1996
- Country of Publication:
- United States
- Language:
- English
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