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
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
- Journal Information:
- Natl. Bur. Stand. (U.S.), Spec. Publ.; (United States), Vol. 425; Conference: Proceedings on nuclear cross section and technology, Washington, DC, USA, 3 Mar 1975; Other Information: See NBS-SPEC.PUBL.--425(Vol.2); CONF-750303--P2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
NEUTRON REACTIONS
FISSION
PLUTONIUM 239 TARGET
CROSS SECTIONS
ERRORS
KEV RANGE 01-10
KEV RANGE 10-100
KEV RANGE 100-1000
URANIUM 235
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
ENERGY RANGE
EVEN-ODD NUCLEI
HADRON REACTIONS
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
KEV RANGE
MINUTES LIVING RADIOISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
RADIOISOTOPES
TARGETS
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
652026* - Nuclear Properties & Reactions
A=220 & above
Experimental- Spontaneous & Induced Fission- (-1987)