1. Jun 27, 2016 #1

   Neo Tran

   

   I don't understand about variance reduction technique. Some one explain PHYS:N, PHYS:P and cutoff. when do I use them?
   Thank you!

    

   Neo Tran, Jun 27, 2016
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3. Jun 30, 2016 #2

   jedishrfu

   

   Insights Author

   Staff: Mentor

   Since no one is answering here, I'm posting a google searched document I found that may answer your questions:
   
   http://web.utk.edu/~rpevey/public/NE582/Chapter 4.pdf

    

   jedishrfu, Jun 30, 2016
4. Jun 30, 2016 #3

   Neo Tran

   

   Thank you very much. It is easy to understand.
   If I have a point isotropic source into a Cone of Directions with angle 30 degree. How to specify SIn, SPn and special SBn card. And if possible, please explain more explicit SBn card. Thanks a lot.

    

   Neo Tran, Jun 30, 2016
5. Jun 30, 2016 #4

   Astronuc

   

   Staff: Mentor

   What version of MCNP is one using?
   

   Here is an appendix to a thesis with some discussion of PHYS:P
   
   

   https://theses.lib.vt.edu/theses/available/etd-07252000-10110036/unrestricted/14Appendix.pdf

    

   Last edited: Jun 30, 2016

   Astronuc, Jun 30, 2016

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