Preequilbrium alpha emission from proton, deuteron, $sup 3$He and alpha induced reactions: evidence for alpha preformation in nuclei

Conference · Tue Dec 31 23:00:00 EST 1974

OSTI ID:4101460

Chevarier, A; Chevarier, N; Demeyer, A; Goldberg, D A; Marion, J B; Wallace, S J ^[1]

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1. eds.

Measurements of continuous energy spectra and angular distributions of alpha particles emitted in proton, deuteron, $sup 3$He and alpha induced reactions were performed. An analysis using the preequilibrium model succeeds in giving an overall description of particle spectra. The alpha particle in this approach being considered as an exciton, a preformation factor around 0.2 for four nucleons to be correlated as an alpha particle is found. The alpha preformation probability deduced from this analysis is independent of the proton, deuteron $sup 3$He incident channel and target nucleus mass. (auth)

• Research Organization: Univ., Lyon; Maryland Univ., College Park (USA). Dept. of Physics and Astronomy
• NSA Number: NSA-33-018986
• OSTI ID: 4101460
• Report Number(s): ORO--4856-26; CONF-750447--
• Country of Publication: United States
• Language: English

Related Subjects

*ALPHA REACTIONS-- PRECOMPOUND-NUCLEUS EMISSION
*COBALT 58 TARGET-- PROTON REACTIONS
*COBALT 58-- PROTON REACTIONS
*DEUTERON REACTIONS-- PRECOMPOUND-NUCLEUS EMISSION
*GALLIUM 67 TARGET-- PROTON REACTIONS
*GALLIUM 67-- PROTON REACTIONS
*HELIUM 3 REACTIONS-- PRECOMPOUND-NUCLEUS EMISSION
*NICKEL 60 TARGET-- PROTON REACTIONS
*NICKEL 60-- PROTON REACTIONS
*POLONIUM 210 TARGET-- PROTON REACTIONS
*POLONIUM 210-- PROTON REACTIONS
*PROTON REACTIONS-- PRECOMPOUND-NUCLEUS EMISSION
642605*
ALPHA PARTICLES
ANGULAR DISTRIBUTION
CORRELATIONS
ENERGY SPECTRA
N68651* --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
59 <= A <= 89--Nuclear Reactions & Scattering
N68951 --Physics (Nuclear
Experimental)--Nuclear Properties & Reactions
190 <= A <= 219--Nuclear Reactions & Scattering