Photon albedo for water, concrete, and iron at normal incidence, and dependence on the thickness of reflecting material

• Published in: Nuclear Technology and Radiation Protection Vol. 28; no. 1; pp. 36 - 44
• Main Authors: Markovic, Vladimir, Krstic, Dragana, Stevanovic, Nenad, Nikezic, Dragoslav
• Format: Journal Article
• Language: English
• Published: VINCA Institute of Nuclear Sciences 01-03-2013
• Subjects: albedo; MCNP; PENELOPE; radiation reflection
• ISSN: 1451-3994; 1452-8185
• DOI: 10.2298/NTRP1301036M

Total number and angular albedo were calculated for commonly used shielding
materials, water, concrete, and iron, for photons with initial energies from
10 keV up to 10 MeV and normal incident angle. Influence of material
thickness on total number albedo was also investigated. Double differential
albedo was determined from simulation of photon transport through materials
by using PENELOPE and MCNP software. Backscattered photons were scored and
grouped in equal intervals of energy and angle. Analytical expressions for
angular and total number albedo as a function of initial energy were
obtained. It was shown that angular albedo can be determined with the same
formula for three examined materials. Corresponding analytical expressions
for number albedo as a function of material thickness were presented in this
paper.