Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Fission cross sections up to 20 MeV/nucleon

Journal Article · · Phys. Rev. C; (United States)
; ; ; ; ; ; ; ; ;
Fission cross sections have been measured for the following reactions: /sup 12/C(at E/sub b/ = 95, 122, 186, 245, and 291 MeV) on /sup 174/Yb, /sup 198/Pt, and /sup 238/U; /sup 16/O (at E/sub b/ = 140, 175, 216, 250, and 315 MeV) on /sup 142/Nd, /sup 170/Er, /sup 192/Os, and /sup 238/U; /sup 32/S (at E/sub b/ = 350, 500, and 700 MeV) on /sup 126/Te, /sup 144/Nd, and /sup 238/U; and /sup 58/Ni (at E/sub b/ = 352 and 875 MeV) on /sup 96/Zr, /sup 116/Cd, and /sup 238/U. We find that use of statistical model calculations with the Bass heavy-ion potential, which fit the data below 10 MeV/nucleon, do not fit fission cross sections at higher energies. Invoking dynamical limitations to fusion such as ''extra-push'' model calculations improves the fit to most of the data. For /sup 12/C and /sup 16/O projectiles on lighter targets, the fission cross section at higher energies is significantly below the value obtained from the rotating liquid drop angular momentum limit, indicating that incomplete fusion reactions may be limiting the fusion process. For S and Ni projectiles, the cross section implies the existence of a composite system sustaining angular momenta far above the limit beyond which, on the basis of liquid drop model predictions, compound nuclei are not expected to have a finite fission barrier. The angular distribution of fission fragments in /sup 12/C- and /sup 16/O-induced reactions has been measured and compared to calculated values. Discrepancies between the measurements and calculated values infer conditions for the breakdown of the transition state model.
Research Organization:
Los Alamos National Laboratory, Los Alamos, New Mexico 87545
OSTI ID:
6257667
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 30:5; ISSN PRVCA
Country of Publication:
United States
Language:
English

Similar Records

Neutron multiplicities as a calorimetric probe of heavy ion-induced fission reactions
Thesis/Dissertation · Tue Dec 31 23:00:00 EST 1991 · OSTI ID:7233170
FISSION AND REACTION CROSS SECTIONS IN THE URANIUM REGION WITH 4- TO 12-Mev PROTONS
Journal Article · Sun Mar 22 23:00:00 EST 1964 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D · OSTI ID:4073794
({sup 16}O + {sup 232}Th) incomplete fusion followed by fission at 140 MeV
Thesis/Dissertation · Thu Dec 30 23:00:00 EST 1993 · OSTI ID:111245

Related Subjects

651726* -- Nuclear Properties & Reactions
A=90-149
Experimental-- Spontaneous & Induced Fission-- (-1987)
651826 -- Nuclear Properties & Reactions
A=150-189
Experimental-- Spontaneous & Induced Fission-- (-1987)
651926 -- Nuclear Properties & Reactions
A=190-219
Experimental-- Spontaneous & Induced Fission-- (-1987)
652026 -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
ANISOTROPY
CADMIUM 116 TARGET
CARBON 12 REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
ENERGY RANGE
ERBIUM 170 TARGET
EXPERIMENTAL DATA
FISSION
FISSION FRAGMENTS
FUSION REACTIONS
HEAVY ION REACTIONS
INFORMATION
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
NEODYMIUM 142 TARGET
NEODYMIUM 144 TARGET
NICKEL 58 REACTIONS
NUCLEAR FRAGMENTS
NUCLEAR REACTIONS
NUMERICAL DATA
OSMIUM 192 TARGET
OXYGEN 16 REACTIONS
PLATINUM 198 TARGET
RECOILS
STATISTICAL MODELS
SULFUR 32 REACTIONS
TARGETS
TELLURIUM 126 TARGET
URANIUM 238 TARGET
YTTERBIUM 174 TARGET
ZIRCONIUM 96 TARGET