Radiative capture mechanisms in the {sup 89}Y({rvec p},{gamma}) reaction
Conference
·
OSTI ID:10178666
- Lawrence Livermore National Lab., CA (United States)
- Duke Univ., Durham, NC (United States)
We have measured the spectra of gamma rays from approximately 14 MeV to the endpoint in the {sup 89}Y({rvec p},{gamma}) reaction with 19.6 MeV polarized protons from the TUNL tandem accelerator. Gamma spectra were measured with a pair of 25.4 cm {times} 25.4 cm anticoincidence shielded NaI detectors at angles of 30, 55, 90, 125, and 150{degrees} with respect to the incident beam. The {gamma}-ray spectra show significant analyzing powers and forward peaking of the angular distributions. These features allow for the discrimination between compound processes which do not exhibit interference between different channels, and direct processes. The observed interference effects indicate that multistep-direct processes are important at {gamma}-ray energies lower than those for which direct-semidirect capture is the dominant mechanism.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48; FG05-91ER40619
- OSTI ID:
- 10178666
- Report Number(s):
- UCRL-JC--113668; CONF-9309173--3; ON: DE93018629
- Country of Publication:
- United States
- Language:
- English
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