Electron-Induced Preequilibrium Alpha Emission

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 an...

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Veröffentlicht in:	Phys. Rev. Lett.; (United States) 1979-01, Vol.43 (5), p.323-326
Hauptverfasser:	Flowers, A. G., Branford, D., McGeorge, J. C., Shotter, A. C., Thorley, P., Zimmerman, C. H., Owens, R. O., Pringle, J. S.
Format:	Artikel
Sprache:	eng
Schlagworte:	651425 - Nuclear Properties & Reactions, A=20-38, Experimental- Nuclear Reactions & Scattering- (-1987) 651625 - Nuclear Properties & Reactions, A=59-89, Experimental- Nuclear Reactions & Scattering- (-1987) 651725 - Nuclear Properties & Reactions, A=90-149, Experimental- Nuclear Reactions & Scattering- (-1987) 651925 - Nuclear Properties & Reactions, A=190-219, Experimental- Nuclear Reactions & Scattering- (-1987) 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 PHYSICS AND RADIATION PHYSICS NUCLEAR REACTIONS PRECOMPOUND-NUCLEUS EMISSION SPECTRA STATISTICAL MODELS TARGETS TRANSITION ELEMENTS
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Beschreibung
Zusammenfassung:	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.
ISSN:	0031-9007
DOI:	10.1103/PhysRevLett.43.323