Effect of weight fractions of H, C and O on the total mass attenuation coefficients of HCO-materials

Singh, Mohinder; Sandhu, Apjit Kaur; Brar, G.S.; Mudahar, Gurmel S.

doi:10.1016/0969-8043(93)90015-3

Applied Radiation and Isotopes

1993

DOI: 10.1016/0969-8043(93)90015-3

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Effect of weight fractions of H, C and O on the total mass attenuation coefficients of HCO-materials

Mohinder Singh

Apjit Kaur Sandhu

G.S. Brar

et al.

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“…Their penetration and diffusion in body can be characterized by the study of a parameter namely photon attenuation coefficient. A large number of photon attenuation measurements, calculations and compilations have been made for different materials [1][2][3][4][5][6][7][8]. The attenuation coefficient has been studied as a function of different parameters.…”

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Effect of weight fraction of different constituent elements on the total mass attenuation coefficients of biological materials

Singh

et al. 2002

Pramana - J Phys

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The mass attenuation coefficients, µ m , of biological materials have been studied as a function of weight fraction of constituent elements (hydrogen, carbon, oxygen and nitrogen). A considerable change in µ m is seen only in low energy region whereas no change is observed with the increasing percentage of constituent elements in high energy region up to 10 MeV. The results have been presented in graphical form.That the radiations can be hazardous as well as useful to different organisms of the body is well-known to any informed person today. Their penetration and diffusion in body can be characterized by the study of a parameter namely photon attenuation coefficient. A large number of photon attenuation measurements, calculations and compilations have been made for different materials [1][2][3][4][5][6][7][8]. The attenuation coefficient has been studied as a function of different parameters. But such studies have to give more attention to biological materials. So in this direction an attempt has been made to study the effect of H, C, O and N weight fractions on the mass attenuation coefficient of biological materials which are listed in table 1.The total mass attenuation coefficients of the chosen biological materials were computed with the help of a convenient and state-of-the-art computer program by Berger and Hubbell [9] named XCOM: 'Photon Cross Sections on a Personal Computer', in the energy range up to 10 MeV.The variation of the computed values of µ m due to weight fractions of different constituent elements is shown in the form of graphs (figures 1-4). Figure 1 depicts the plot of µ m vs. hydrogen weight fraction. From this graph, it is seen that at low energies up to 0.8 MeV, initially there is a sharp decrease in µ m having a large negative slope and then in the middle energy region slope is positive with small value 151

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Effect of weight fraction of different constituent elements on the total mass attenuation coefficients of biological materials

Singh

et al. 2002

Pramana - J Phys

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Energy and chemical composition dependence of mass attenuation coefficients of building materials

Singh

Kumar

et al. 2004

Annals of Nuclear Energy

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Effect of weight fractions of H, C and O on the total mass attenuation coefficients of HCO-materials

Cited by 2 publications

References 6 publications

Effect of weight fraction of different constituent elements on the total mass attenuation coefficients of biological materials

Effect of weight fraction of different constituent elements on the total mass attenuation coefficients of biological materials

Energy and chemical composition dependence of mass attenuation coefficients of building materials

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