A STUDY OF THE Be$sup 9$(p,$alpha$)Li$sup 6$ REACTION FROM 3.5 TO 12.5 Mev
Angular distributions and excitation curves for the Be(p, alpha /sub 0/)/ sup 6/Li and Be(p, alpha /sub 1/)/sup 6*/Li (2.18 Mev) reactions have been measured for proton bombarding energies from 3.50 to 12.50 Mev. Total cross sections for alpha /sub 0/ and alpha /sub 1/ as well as 90 deg (lab) yields are monotonically decreasing functions of energy, and the angular distributions show very little change with energy. These data suggest that the reaction is predominantly a direct process over the energy interval studied. No prominent resonance behavior is observed in the energy interval corresponding to excitation energies in /sup 10/B from 9.3 to 17.8 Mev. In order to perform a consistent distorted-wave Born approximation (DWBA) calculation of the reaction, elastic scattering expenlments in the ertrance and exit channels were performed. At the same time data were obtained on several other reactions, namely /sup 9/Be(p,d) / sup 8/Be /sup 9/Be(p p')/sup 9/* Be (2.43 Mev), /sup 6/Li( alpha alpha ')/sup 6/ Li (2 .18 Mev) and /sup 6/Li( alpha ,d)/sup 8/Be. Optical model parameters for the zero-range DWBA calculation of /sup 9/Be(p, alpha )/sup 6/Li were obtained by analyzing the elastic scattering data. Results of the calculation based on the triton pick-up process give fairly good agreement with the data for alpha /sub 0/ , but not for alpha /sub 1/. These results are compared to plane wave calculations. The possibility of interpreting the data in terms of exchange processes is also discussed, as well as the applicability of the DWBA calculation to this reaction. (auth)
- Research Organization:
- Florida State Univ., Tallahassee and Universitet, Copenhagen
- NSA Number:
- NSA-18-018947
- OSTI ID:
- 4050252
- Journal Information:
- Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B, Journal Name: Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B Vol. Vol: 49; ISSN NUPHA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ANGULAR DISTRIBUTION
BERYLLIUM 8
BERYLLIUM 9
BORON 10
CROSS SECTIONS
DEUTERONS
DIRECT REACTIONS
DWBA APPROXIMATION
ENERGY RANGE
EXCHANGE MODEL
EXCITATION
LITHIUM 6
MEASURED VALUES
MEV RANGE
NUCLEAR MODELS
NUCLEAR REACTIONS
NUMERICALS
OPTICAL MODEL
PHYSICS
PROTON BEAMS
PROTONS
REACTION KINETICS
RESONANCE
SCATTERING
TRITONS
ZERO- RANGE APPROXIMATION