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Electron-induced preequilibrium alpha emission. [30 to 120 MeV]

Journal Article · · Phys. Rev. Lett.; (United States)
; ; ; ; ; ; ;

This paper presents energy spectra of ..cap alpha.. particles emitted following the bombardment of /sup 27/Al, /sup nat/Ni, /sup 92/Mo, /sup 94/Mo, and /sup 197/Au with 120-MeV electrons, together with ..cap alpha..-particle angular distributions from /sup 197/Au and /sup nat/Ni for E/sub b/ = 30 and 50 MeV. The data are compared with preequilibrium exciton-model and statistical-model calculations. It is concluded that few-step processes are dominant in the production of ..cap alpha.. particles with energies above 20 MeV.

Research Organization:
Department of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
OSTI ID:
6047255
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 43:5; ISSN PRLTA
Country of Publication:
United States
Language:
English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
ALPHA SPECTRA
ALUMINIUM 27 TARGET
ANGULAR DISTRIBUTION
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
DISTRIBUTION
ELECTRON REACTIONS
ELEMENTS
ENERGY RANGE
EXCITON MODEL
GOLD 197 TARGET
LEPTON REACTIONS
MATHEMATICAL MODELS
METALS
MEV RANGE
MEV RANGE 100-1000
MOLYBDENUM 92 TARGET
MOLYBDENUM 94 TARGET
NICKEL
NUCLEAR MODELS
NUCLEAR REACTIONS
PRECOMPOUND-NUCLEUS EMISSION
SPECTRA
STATISTICAL MODELS
TARGETS
TRANSITION ELEMENTS