Scattering Model Approximations for Neutron Thermalization Problems
| Autor: | Robert U. Mulder, Roger Lee Ritenour, Roger A. Rydin |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Physics
010308 nuclear & particles physics Scattering Neutron diffraction Hadron 0211 other engineering and technologies 02 engineering and technology Fermion Neutron scattering 01 natural sciences Nuclear physics Nuclear Energy and Engineering 0103 physical sciences Neutron source Neutron 021108 energy Nuclear Experiment Nucleon |
| Zdroj: | Nuclear Science and Engineering. 106:457-470 |
| ISSN: | 1943-748X 0029-5639 |
| DOI: | 10.13182/nse90-a23770 |
| Popis: | In this paper a variety of scattering model approximations are devised and evaluated. One such scattering model, designated the balanced single collision thermalization (BSCT) approximation, has proven to be very effective. It assumes that neutrons attain a thermalized distribution with only a single collision within the moderating material, independent of incident energy. This approximation leads to separability of the incident and outscattering energies and to significant simplification of the neutron scattering kernel for thermalization problems. The BSCT approximation is particularly useful in thermalization problems involving cold neutron sources, for which it yields flux predictions to within a few percent of exact solutions of theoretical problems. The BSCT approximation also predicts cold neutron fractions to within 10% of measured values for a cold neutron thermalization experiment done at Argonne National Laboratory. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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