Determination of GAMMA/sub n//GAMMA/sub f/ at 12 to 20 MeV excitation from evaporation-residue cross sections

Journal Article · Mon May 30 00:00:00 EDT 1977 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.38.1262· OSTI ID:7310147

Goldstone, P D; Britt, H C; Schoenmackers, R; Wilhelmy, J B

Angular distributions of evaporation residues from the (/sup 7/Li, ..cap alpha..) reaction on /sup 197/Au, /sup 232/Th, and /sup 236/U have been measured as a function of excitation energy in the compound nuclei /sup 200/Hg, /sup 235/Pa, and /sup 239/Np. Evaporation-residue probabilities P/sub ER/ = sigma (/sup 7/Li,..cap alpha..xn)/sigma (/sup 7/Li, ..cap alpha..) are obtained. These give the first microscopic information on GAMMA/sub n//GAMMA/sub f/ at 12 to 20 MeV excitation, which is independent of the compound-nucleus formation cross section. The results are compared with expectations based on previous systematic values of GAMMA/sub n//GAMMA/sub f/.

• Research Organization: Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico 87545
• OSTI ID: 7310147
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 38:22; ISSN PRLTA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA PARTICLES
ANGULAR CORRELATION
ANGULAR DISTRIBUTION
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
COMPOUND NUCLEI
COMPOUND-NUCLEUS REACTIONS
CORRELATIONS
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVAPORATION MODEL
EVEN-EVEN NUCLEI
EXCITATION
FERMIONS
FISSION
GOLD 197 TARGET
HADRONS
HEAVY ION REACTIONS
HEAVY NUCLEI
ISOTOPES
LITHIUM 7 REACTIONS
MATHEMATICAL MODELS
MERCURY 200
MERCURY ISOTOPES
MEV RANGE
MEV RANGE 10-100
MINUTES LIVING RADIOISOTOPES
NEPTUNIUM 239
NEPTUNIUM ISOTOPES
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PROTACTINIUM 235
PROTACTINIUM ISOTOPES
RADIOISOTOPES
STABLE ISOTOPES
STATISTICAL MODELS
TARGETS
THORIUM 232 TARGET
URANIUM 236 TARGET