Compound and precompound emission of. cap alpha. particles in reactions of even Zn isotopes with low-energy protons and /sup 4/He ions

Journal Article · Sat Jul 01 00:00:00 EDT 1978 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.18.148· OSTI ID:7020876

Lux, C R; Porile, N T

Energy spectra of ..cap alpha.. particles emitted in the reactions of /sup 64/Zn, /sup 66/Zn, /sup 68/Zn, and /sup 70/Zn with 12.5 MeV protons and 18 MeV /sup 4/He ions were measured between 30/sup 0/ and 150/sup 0/ to the beam. The contribution of the precompound process was determined on the basis of the asymmetry in the angular distribution and by comparison of the spectra with calculations based on the compound and precompound models. Both methods indicate that the contribution of this process increases with target neutron number and is of greatest importance for the (..cap alpha..,..cap alpha..') reaction. The ratio of ..cap alpha.. to neutron evaporation widths is found to depend strongly on target neutron number and a correlation is established with the corresponding separation energies.

• Research Organization: Department of Chemistry, Purdue University, Lafayette, Indiana 47907
• OSTI ID: 7020876
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 18:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651625* -- Nuclear Properties & Reactions
A=59-89
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ALPHA SPECTRA
ANGULAR DISTRIBUTION
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
DISTRIBUTION
ENERGY RANGE
ENERGY SPECTRA
EVAPORATION MODEL
HADRON REACTIONS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PRECOMPOUND-NUCLEUS EMISSION
PROTON REACTIONS
SPECTRA
TARGETS
ZINC 64 TARGET
ZINC 66 TARGET
ZINC 68 TARGET
ZINC 70 TARGET