Total reflection coefficients of low-energy photons presented as universal functions
| Autor: | Vladan Ljubenov, Srpko Markovic, D Radovan Ilic, D Rodoljub Simovic |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Photon
Monte Carlo method mean number of photon scatterings 02 engineering and technology Photon energy 01 natural sciences photon reflection 0103 physical sciences lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Safety Risk Reliability and Quality 010302 applied physics Physics total number albedo Total internal reflection Plane (geometry) Monte Carlo method for photon transport 021001 nanoscience & nanotechnology Reflection (mathematics) Nuclear Energy and Engineering Electromagnetic shielding lcsh:QC770-798 total energy albedo Atomic physics 0210 nano-technology |
| Zdroj: | Nuclear Technology and Radiation Protection, Vol 25, Iss 2, Pp 100-106 (2010) Nuclear technology and radiation protection |
| ISSN: | 1451-3994 |
| DOI: | 10.2298/ntrp1002100l |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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