Neutron-induced fission cross sections of /sup 233/U, /sup 234/U, /sup 236/U, and /sup 238/U with respect to /sup 235/U

Conference · Wed Oct 01 04:00:00 EDT 1975 · Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States)

OSTI ID:7275659

Behrens, J W; Carlson, G W; Bauer, R W

Ratios of the neutron-induced fission cross sections of /sup 233/U, /sup 234/U, /sup 236/U, and /sup 238/U relative to /sup 235/U of /sup 238/U relative to /sup 233/U were measured with fission ionization chambers at the LLL 100-MeV electron linear accelerator. The time-of-flight technique was used to measure the cross section ratios as a function of neutron energy from 0.1 to 30 MeV, except for the /sup 233/U:/sup 235/U and /sup 238/U:/sup 233/U ratios, which were measured from 0.001 to 30 MeV, and 1 to 30 MeV, respectively. The continuous energy spectrum of the neutron source allowed us to cover the entire energy range of each ratio in one measurement. The threshold cross section method was used to normalize the ratios independent of other cross section measurements. Typical energy resolutions of the data are 5 percent at 20 MeV and 1.5 percent at 1 MeV. Most of the data have counting uncertainties smaller than 4 percent. Systematic errors are discussed, and current results are compared with previous measurements. 9 figures, 4 tables. (auth)

• Research Organization: Univ. of California, Livermore
• OSTI ID: 7275659
• Conference Information: Journal Name: Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States) Journal Volume: 425
• Country of Publication: United States
• Language: English

Related Subjects

652026* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CROSS SECTIONS
FISSION
HADRON REACTIONS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
TARGETS
TIME-OF-FLIGHT METHOD
URANIUM 233 TARGET
URANIUM 234 TARGET
URANIUM 236 TARGET
URANIUM 238 TARGET