The {sup 2}H({rvec p},{gamma}){sup 3}He and {sup 1}H({rvec d},{gamma}){sup 3}He reactions below 80 keV
- Department of Physics, Duke University, Durham, North Carolina 27708 (United States)
- Triangle Universities Nuclear Laboratory, Duke Station, Durham, North Carolina 27708 (United States)
The details of a recent experimental study of the {sup 2}H({rvec p},{gamma}){sup 3}He and the {sup 1}H({rvec d},{gamma}){sup 3}He reactions for beam energies below 80 keV are discussed. In this study, both polarized and unpolarized incident beams were used to measure the cross section {sigma}({theta},E), the astrophysical S factor S({theta},E), the vector analyzing power A{sub y}({theta},E), and the tensor analyzing power T{sub 20}({theta}). In addition, the {gamma}-ray linear polarization P{sub {gamma}}({theta}) was measured for an unpolarized incident beam. The experimental details of these measurements are discussed and the data are analyzed to obtain the amplitudes and phases of the contributing transition-matrix elements. The results of our measurements are compared with recent {ital ab initio} three-body theoretical calculations. This comparison reveals the large sensitivity of the polarization observables, especially the vector analyzing power (A{sub y}), to the presence of meson-exchange current effects and indicates the need for further study. The tensor analyzing power data [T{sub 20}({theta})] are used to extract a value of the asymptotic D- to S-state ratio, {eta}, for {sup 3}He. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 365364
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 5 Vol. 56; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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