Open AccessA semi empirical formula for the angular differential number albedo of low-energy photons
Author(s) -
Srpko Marković,
Vladan Ljubenov,
D Rodoljub Simovic
Publication year - 2005
Publication title -
nuclear technology and radiation protection
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.31
H-Index - 16
eISSN - 1452-8185
pISSN - 1451-3994
DOI - 10.2298/ntrp0502028m
Subject(s) - albedo (alchemy) , monte carlo method , photon , physics , photon energy , differential (mechanical device) , range (aeronautics) , computational physics , optics , mathematics , statistics , materials science , art , performance art , composite material , thermodynamics , art history
Low-energy photon reflection from water, aluminum, and iron is simulated by the MCNP code and results are com pared with similar Monte Carlo calculations. For the energy range from 60 to 150 keV and for the normal incidence of initial photons, a universal shape of the normalized angular differential number albedo is observed and after that fitted by the curve fit ting procedure in form of a second order polynomial over the polar angle. Finally, a one-parameter formula for the angular differential number albedo is developed and verified for water through the comparison of results with the semi empirical formulae and Monte Carlo calculations of other authors