TY - JOUR
TI - Total reflection coefficients of low-energy photons presented as universal functions
AU - Ljubenov Vladan
AU - Simović Rodoljub D.
AU - Marković Srpko
AU - Ilić Radovan D.
JN - Nuclear Technology and Radiation Protection
PY - 2010
VL - 25
IS - 2
SP - 100
EP - 106
PT- Article
AB- 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.