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D. Kwiat
Nuclear Science and Engineering | Volume 76 | Number 2 | November 1980 | Pages 255-257
Technical Note | doi.org/10.13182/NSE76-255
Articles are hosted by Taylor and Francis Online.
It is known that, based on Wigner's rational approximation, the escape probability function can be improved by the insertion of geometry dependent constants. Bonalumi improved this method by replacing these constants by a function. The formulas derived here, based on general considerations, justify the form given by Bonalumi and generalize it to spheres as well. The results for a cylinder and a sphere are compared to the exact tabulated values, and show an error of <0.3% through the whole spectral region. Only one parameter is needed here. The method is shown to be insensitive to this parameter to a certain extent. Comparison is also made with the results achieved by the P0 + AP2 method. The treatment here is limited to an isolated lump, for cylinders and spheres only.