Evaluation of the unresolved resonance range of sup 238 U + n. Part 2; Differential data tests
- Kernforschungszentrum Karlsruhe, Inst. fur Neutronenphysik und Reaktortechnik, W-7500 Karsruhe (DE)
This paper reports that an evaluation of the {sup 238}U neutron cross sections in the unresolved resonance region that was adopted for the evaluated nuclear data files JEF-2 (up to 200 keV) and ENDF/B-VI (up to 149 keV) has been checked against recent capture cross-section measurements and against thick-sample transmission data and capture self-indication ratios. Effects of the unresolved resonance structure on self-shielding and multiple scattering were treated by Monte Carlo techniques based on resonance statistics and average resonance parameters. It was found that the average cross sections and average resonance parameters given in the new evaluation permit very satisfactory reproduction of all the test data. Indications are that the average total and capture cross sections including self-shielding are now known below 200 keV with accuracies close to those requested in nuclear technology.
- OSTI ID:
- 7274396
- Journal Information:
- Nuclear Science and Engineering; (United States), Journal Name: Nuclear Science and Engineering; (United States) Vol. 111:4; ISSN 0029-5639; ISSN NSENA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BARYON REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DIMENSIONS
ENERGY RANGE
EVEN-EVEN NUCLEI
FISSION
HADRON REACTIONS
HEAVY NUCLEI
INFORMATION
ISOTOPES
KEV RANGE
KEV RANGE 100-1000
MONTE CARLO METHOD
MULTIPLE SCATTERING
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
RADIOISOTOPES
RESOLUTION
RESONANCE
SCATTERING
SPONTANEOUS FISSION RADIOISOTOPES
TESTING
THICKNESS
TOTAL CROSS SECTIONS
URANIUM 238
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES