Nuclear Science and Engineering / Volume 28 / Number 2 / May 1967 / Pages 190-197
Technical Paper / dx.doi.org/10.13182/NSE67-A17468
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An exact solution to the monoenergetic Boltzmann equation is obtained for the case of a plane isotropic burst of neutrons introduced at the interface separating two adjacent, dissimilar, semi-infinite media. The method of solution used is to remove the time dependence by a Laplace transformation, solve the transformed equation by the normal mode expansion method, and then invert to recover the time dependence. The general result is expressed mainly as a sum of definite, multiple integrals. Certain simplifications were possible at the interface and these are explicitly noted.