Sensitivity of computed uranium-238 self-shielding factors to the choice of the unresolved average resonance parameters
- 1. Oak Ridge National Laboratory, P.O. Box X, Bldg. 6025 Oak Ridge, Tennessee 37830
Description
The influence of different representations of the unresolved resonances of 238U on the computed self-shielding factors is examined. It is shown that the evaluated infinitely diluted average capture cross section does not provide sufficient information to determine a unique set of unresolved resonance parameters; different sets of unresolved resonance parameters equally consistent with the evaluated average capture cross section yield significantly different computed self-shielding factors. In the conclusion it is recommended that the resolved resonance description of the evaluated 238U cross sections be extended to higher energies and that thick sample transmission data and self-indication data be used to improve the evaluation of the unresolved resonance region
Additional details
Publishing Information
- Journal Title
- Nucl. Sci. Eng.
- Journal Volume
- 81
- Journal Issue
- 1
- Series
- Nucl. Sci. Eng.
- Journal Page Range
- 55-65
- ISSN
- 0029-5639
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 16001215
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- CAPTURE; COMPUTER CALCULATIONS; CROSS SECTIONS; DATA ACQUISITION; DATA TRANSMISSION; ENERGY LEVELS; MULTI-PARAMETER ANALYSIS; NEUTRON REACTIONS; PERFORMANCE; RESONANCE; SELF-SHIELDING; URANIUM 238 TARGET
- Descriptors DEC
- BARYON REACTIONS; COMMUNICATIONS; HADRON REACTIONS; NUCLEAR REACTIONS; NUCLEON REACTIONS; TARGETS