Thermal Neutron Spectrum in a Moderator with a Temperature Discontinuity
作者:
PearceR. M.,
KennedyJ. M.,
期刊:
Nuclear Science and Engineering
(Taylor Available online 1964)
卷期:
Volume 19,
issue 1
页码: 102-107
ISSN:0029-5639
年代: 1964
DOI:10.13182/NSE64-A19794
出版商: Taylor&Francis
数据来源: Taylor
摘要:
AbstractThe variation in space of the thermal-neutron spectrum close to a temperature discontinuity in a non-absorbing free gas has been calculated in the diffusion approximation on a G-20 computer. This spectrum forms a basis for testing two simple rethermalization models. The two-overlapping-group model due to Selengut gives very good agreement with the computer calculations when used with an improved transfer cross section. The single-Maxwellian model in which the neutron temperature varies exponentially with distance from the discontinuity does not give as good agreement.
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