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Measurements of neutron-induced fission cross-section ratios involving isotopes of uranium and plutonium. [0. 001 to 30 MeV, cross sections]

Conference ·
OSTI ID:7184195
;

A procedure, called the threshold cross section method was applied to our experimental data involving four uranium (/sup 233/U /sup 234/U, /sup 236/U, and /sup 238/U) and five plutonium (/sup 239/Pu, /sup 240/Pu, /sup 241/Pu, /sup 242/Pu, and /sup 244/Pu) isotopes to determine ratios of fission cross sections relative to /sup 235/U. The data were gathered using ionization fission chambers and the time-of-flight technique at the LLL 100-MeV electron linear accelerator: measurements span the neutron energy range of 0.001 to 30 MeV. Experimental uncertainties common to past measurements were either eliminated or significantly reduced in this study by use of the threshold method, thereby making higher accuracies possible. The cross section ratios are absolute in the sense that they do not depend on the work of others. Results from our ratios involving /sup 233/U, /sup 235/U, /sup 238/U, and /sup 239/Pu are used to illustrate this method.

Research Organization:
California Univ., Livermore (USA). Lawrence Livermore Lab.
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
7184195
Report Number(s):
UCRL-78268; CONF-760647-2
Country of Publication:
United States
Language:
English

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Related Subjects

652026* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CROSS SECTIONS
ENERGY
ENERGY RANGE
FISSION
HADRON REACTIONS
KEV RANGE
MEV RANGE
MEV RANGE 01-10
MEV RANGE 10-100
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PLUTONIUM 239 TARGET
PLUTONIUM 240 TARGET
PLUTONIUM 241 TARGET
PLUTONIUM 242 TARGET
PLUTONIUM 244 TARGET
TARGETS
THRESHOLD ENERGY
URANIUM 233 TARGET
URANIUM 234 TARGET
URANIUM 236 TARGET
URANIUM 238 TARGET