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The Derivation and Proper Use of Stewart’s Formula for Thermal Neutron Self-Shielding in Scattering Media

M. Blaauw

Nuclear Science and Engineering / Volume 124 / Number 3 / Pages 431-435

November 1996

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The derivation and proper use of a formula originally published in 1959 for thermal neutron self-shielding computations in scattering bodies are presented. It is shown that the f0 entity in this formula must be computed using the total macroscopic cross section t instead of the macroscopic absorption cross section ∑a, as was stated in previous publications. The validity of the formula is verified by Monte Carlo computations.

 
 
 
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