QUASI-ELASTIC PROTON-ALPHA COLLISIONS IN CARBON

Journal Article · Mon Apr 01 04:00:00 EST 1963 · Nuclear Physics (Netherlands) Divided into Nucl. Phys. A and Nucl. Phys. B

DOI:https://doi.org/10.1016/0029-5582(63)90747-8· OSTI ID:4703695

James, A N; Pugh, H G

The possibility of quasi-elastic p- alpha collisions in carbon nuclei was investigated experimentally by looking for correlated proton-alpha coincidences when C/sup 12/ is bombarded by 150 Mev protons. A peak was found in the angular correlation centered about the kinematic angle for free p- alpha collisions and with a width, which when interpreted as arising from the alpha - cluster momentum before impact, gives momenta of about the same size as are observed in highenergy (p,2p) reactions. Under the circumstances of the experiment the probability of finding an alpha -cluster in the C/sup 12/ nucleus was found to be 0.30 using a plane wave impulse approximation to integrate over the angular correlation. This figure is considered to be large since no allowance was made for the strong nuclear absorption effects expected. The detailed results pose certain problems for the alpha -cluster model of the C/sup 12/ ground state. (auth)

• Research Organization: Univ. of Liverpool
• NSA Number: NSA-17-024449
• OSTI ID: 4703695
• 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: 42; ISSN NUPHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
ALPHA PARTICLES
ANGULAR DISTRIBUTION
CARBON 12
COINCIDENCE METHODS
COLLISIONS
ENERGY
ENERGY LEVELS
ENERGY RANGE
IRRADIATION
MOMENTUM
NUCLEAR REACTIONS
NUCLEI
PHYSICS
PROTONS
QUANTUM MECHANICS