Nuclear Science and Engineering / Volume 9 / Number 3 / March 1961 / Pages 367-369
Technical Paper / dx.doi.org/10.13182/NSE61-A25889
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In this paper, we discuss the effect of diffusion on the slowing-down spectrum of neutrons in the upper portion of the thermal regime. We find that in a typical case, the perturbation due to diffusion is comparable to the difference between bound atom and free atom spectra, in the energy range E > 0.1 ev.