Search for entrance channel effects in sub-barrier fusion reactions

Journal Article · Wed Feb 01 00:00:00 EST 1995 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.51.628· OSTI ID:6638066

Charlop, A; Bierman, J; Drebi, Z; Garcia, A; Gil, S; Prindle, D; Sonzogni, A; Vandenbosch, R; Ye, D ^[1]

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1. University of Washington, Nuclear Physics Laboratory GL-10, Seattle, Washington, 98195 (United States)

In order to explore the possibility that previously observed anomalous mean angular momenta are related to the mass asymmetry of the entrance channel, we have studied three systems, [sup 28]Si + [sup 142]Ce, [sup 32]S + [sup 138]Ba, and [sup 48]Ti + [sup 122]Sn, all of which lead to the same compound nucleus, [sup 170]Hf. Gamma ray multiplicities for fusion have been determined using an electrostatic deflector and time of flight to identify the evaporation residues. Results have been obtained for bombarding energies from approximately 20% above the Coulomb barrier down to nearly 10% below the barrier. The mean angular momenta deduced from the gamma ray multiplicities are generally well reproduced by coupled channels calculations employing known deformation parameters and an estimate of the transfer strength and do not show any evidence of an unexpected effect related to the mass asymmetry of the entrance channel.

• OSTI ID: 6638066
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 51:2; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARIUM 138 TARGET
SULFUR 32 REACTIONS
CERIUM 142 TARGET
SILICON 28 REACTIONS
HEAVY ION FUSION REACTIONS
ANGULAR MOMENTUM
COUPLED CHANNEL THEORY
TIN 122 TARGET
TITANIUM 48 REACTIONS
ASYMMETRY
COMPOUND NUCLEI
COULOMB FIELD
DEFORMATION
EVAPORATION
GAMMA RADIATION
HAFNIUM 170
MASS
MULTIPLICITY
TIME-OF-FLIGHT METHOD
BETA DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
EVEN-EVEN NUCLEI
HAFNIUM ISOTOPES
HEAVY ION REACTIONS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
NUCLEAR REACTIONS
NUCLEI
PHASE TRANSFORMATIONS
RADIATIONS
RADIOISOTOPES
TARGETS
663450* - Heavy-Ion-Induced Reactions & Scattering- (1992-)