Measurement of the /sup 239/Pu fission cross-section and its ratio to the /sup 235/U fission cross-section in the energy range from 1 keV to 1 MeV

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

OSTI ID:7275667

Gayther, D B

The cross-section for the /sup 239/Pu(n,f) reaction has been measured on the Harwell 45 MeV linac using the time-of-flight method. Fission events were recorded by detecting the prompt neutrons and the incident neutron flux spectrum was measured with a detector which was calibrated against two standard detectors. The cross-section was normalized in the 10 to 30 keV energy interval to agree with the recent evaluation of Sowerby et al. Comparison with this evaluation shows agreement to within 5% at energies above a few keV. The agreement with the ENDF/B-IV evaluation is generally within 4% throughout the complete energy range. A similar comparison is made for the ratio of the /sup 239/Pu and /sup 235/U fission cross-sections, obtained from the present measurement, and a previously published measurement of the /sup 235/U(n,f) cross-section made with the same equipment. 3 tables, 2 figures. (auth)

• Research Organization: Atomic Energy Research Establishment, Harwell, Eng.
• OSTI ID: 7275667
• 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
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
CROSS SECTIONS
ENERGY RANGE
ERRORS
EVEN-ODD NUCLEI
FISSION
HADRON REACTIONS
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KEV RANGE
KEV RANGE 01-10
KEV RANGE 10-100
KEV RANGE 100-1000
MINUTES LIVING RADIOISOTOPES
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PLUTONIUM 239 TARGET
RADIOISOTOPES
TARGETS
URANIUM 235
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES