Open AccessTotal reflection coefficients of low-energy photons presented as universal functions
Author(s) -
Vladan Ljubenov,
D Rodoljub Simovic,
Srpko Marković,
D Radovan Ilic
Publication year - 2010
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/ntrp1002100l
Subject(s) - photon , physics , monte carlo method , reflection (computer programming) , albedo (alchemy) , scattering , computational physics , monte carlo method for photon transport , photon energy , electromagnetic shielding , optics , atomic physics , quantum mechanics , statistics , mathematics , art , hybrid monte carlo , performance art , markov chain monte carlo , computer science , art history , programming language
The possibility of expressing the total particle and energy reflection coefficients of low-energy photons in the form of universal functions valid for different shielding materials is investigated in this paper. The analysis is based on the results of Monte Carlo simulations of photon reflection by using MCNP, FOTELP, and PENELOPE codes. The normal incidence of the narrow monoenergetic photon beam of the unit intensity and of initial energies from 20 keV up to 100 keV is considered, and particle and energy reflection coefficients from the plane homogenous targets of water, aluminum, and iron are determined and compared. The representations of albedo coefficients on the initial photon energy, on the probability of large-angle photon scattering, and on the mean number of photon scatterings are examined. It is found out that only the rescaled albedo coefficients dependent on the mean number of photon scatterings have the form of universal functions and these functions are determined by applying the least square method