Abstract
Mass attenuation coefficients of glass systems xPbO: 20Na2O: (80-x)B2O3 (x = 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 and 55% mol) were determined at 662 keV photon energy using gamma rays transmission method. The theoretical values of mass attenuation coefficients were calculated by WinXCom program. These coefficients were then used to determine the effective atomic numbers of glass samples. All shielding parameters were increased with increasing of PbO concentration. Our results have uncertainty less than 1% between experimental and theoretical values.
Highlights
The study of absorption of gamma radiations in shielding materials has been important subject in the field of radiation physics and is potential useful in development of semi-empirical formulations of high accuracy (Singh et al, 2002).In 1982 Hubbell published tables of mass attenuation coefficients and the mass energy absorption coefficients for 40 elements and 45 mixtures and compounds over energy range from 1 keV to 20 MeV
In composite materials it is related to density and effective atomic number, knowledge of the mass attenuation coefficients is of prime importance
Sample preparation: The glass system xPbO: 20Na2O: (80-x)B2O3 where x = 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 and 55 mol% were prepare by melt quenching technique at Glass and Materials Science Research Unit (GMSRU), Nakhon Pathom Rajabhat University
Summary
The study of absorption of gamma radiations in shielding materials has been important subject in the field of radiation physics and is potential useful in development of semi-empirical formulations of high accuracy (Singh et al, 2002).In 1982 Hubbell published tables of mass attenuation coefficients and the mass energy absorption coefficients for 40 elements and 45 mixtures and compounds over energy range from 1 keV to 20 MeV. Berger and Hubbell developed the theoretical tables and computer program (XCOM) for calculating attenuation coefficients for elements, compounds and mixtures for photon energies from 1 keV to 100 GeV (Singh et al, 2004; 2008).
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