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Pn scattering order

  1. Sep 13, 2011 #1
    I use some computational codes.I must to enter Pn scattering order for some materials.What means that? For example what is difference betwen P1,P2,P3 order?
     
  2. jcsd
  3. Sep 13, 2011 #2

    Astronuc

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    Staff: Mentor

    Assuming one is familiar with discrete ordinates methods and spherical harmonics, the n in Pn refers to the number (n+1) of Legendre polynomials with which one expands the angular flux in transport problems, usually in slab geometry.

    See also -
    Why are the Pn and Sn Methods Equivalent
    https://wci.llnl.gov/codes/tart/media/pdf/UCRL-JC-145518.pdf

    krein.unica.it/~cornelis/private/ASTRONOMY/JQSRT/jqsrt71_1_25.pdf

    https://eng.ucmerced.edu/people/mmodest/portal/publications/papers/JQSRTv109.pdf

    P.R.M Storchi, Application of the Pn-method to the calculation of the anaular flux of gamma rays, Journal of Computational Physics, Volume 55, Issue 1, July 1984, Pages 81-97, ISSN 0021-9991, 10.1016/0021-9991(84)90016-0.
    (http://www.sciencedirect.com/science/article/pii/0021999184900160)
     
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