Statistical analysis of heavy-ion induced fission excitation functions

Journal Article · Thu Sep 01 04:00:00 EDT 1977 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.16.1058· OSTI ID:7290263

Bisplinghoff, J; Mignerey, A; Blann, M; David, P; Scobel, W

The Bohr-Wheeler model has been used with the rotating liquid drop model to calculate fission excitation functions using a computer code with multiple particle emission competition. Calculations were performed for fission induced by /sup 35/Cl ions with laboratory energies up to 170 MeV on /sup 62/Ni, /sup 116/Sn, and /sup 141/Pr targets. The dependence of the fission cross sections on angular momentum, barrier heights, ground state and saddle point level density parameters, and for first versus multiple chance fission is illustrated. One set of parameters, not necessarily unique, is shown which gives fair reproduction of the measured /sup 116/Sn and /sup 141/Pr + /sup 35/Cl fission excitation functions. It is shown that fission barriers considerably lower than the rotating liquid drop values are required and that variations of other parameters alone cannot reproduce the experimental excitation functions. Asymptotic weaknesses of the statistical treatment at high excitation energies are discussed and qualitatively shown to give errors in the direction observed in the comparisons of experimental and calculated results.

• Research Organization: Nuclear Structure Research Laboratory, University of Rochester, Rochester, New York
• OSTI ID: 7290263
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 16:3; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651615* -- Nuclear Properties & Reactions
A=59-89
Theoretical-- Nuclear Reactions & Scattering-- (-1987)
651716 -- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
BOHR-WHEELER THEORY
CHARGED-PARTICLE REACTIONS
CHLORINE 35 REACTIONS
CROSS SECTIONS
ENERGY
ENERGY RANGE
ENERGY-LEVEL DENSITY
EXCITATION FUNCTIONS
FISSION
FISSION BARRIER
HEAVY ION REACTIONS
LIQUID DROP MODEL
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 100-1000
NICKEL 62 TARGET
NUCLEAR MODELS
NUCLEAR REACTIONS
POTENTIAL ENERGY
PRASEODYMIUM 141 TARGET
TARGETS
TIN 116 TARGET