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Fig. 1. The curve shows the calculated effective atomic number of lauric acid as a function of energy. The squares are the experimental data points of Manjunathaguru and Umesh [13] the triangles are the experimental data points of Sandhu et al. [23].

Figure 1 The curve shows the calculated effective atomic number of lauric acid as a function of energy. The squares are the experimental data points of Manjunathaguru and Umesh [13] the triangles are the experimental data points of Sandhu et al. [23].

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(Z) is the mean atomic number calculated from the chemical formula; Zog is the effective atomic number calculated at 1 MeV, where Compton scattering is the main photon interaction process. Fatty acids studied in the present work Table 1 S.R. Manohara et al.! Nucl. Instr. and Meth. in Phys. Res. B 266 (2008) 3906-3912
(Z) is the mean atomic number calculated from the chemical formula; Zog is the effective atomic number calculated at 1 MeV, where Compton scattering is the main photon interaction process. Fatty acids studied in the present work Table 1 S.R. Manohara et al.! Nucl. Instr. and Meth. in Phys. Res. B 266 (2008) 3906-3912
Fig. 2. The curve shows the calculated effective atomic number of cysteine. The squares are the experimental data points of Manjunathaguru and Umesh [14]. For cysteine, an amino acid, the same energy regions as for lauric acid are visible in the graph of Z. versus energy (Fig. 2). At intermediate energies, where Compton scatter- ing is the main interaction process, Zeg_=4.6 in perfect agreement with the mean atomic number (Z) = 4.6 calcu-
Fig. 2. The curve shows the calculated effective atomic number of cysteine. The squares are the experimental data points of Manjunathaguru and Umesh [14]. For cysteine, an amino acid, the same energy regions as for lauric acid are visible in the graph of Z. versus energy (Fig. 2). At intermediate energies, where Compton scatter- ing is the main interaction process, Zeg_=4.6 in perfect agreement with the mean atomic number (Z) = 4.6 calcu-
Fig. 3. The curve shows the calculated effective atomic number of glass with composition 0.15CaO-0.15SrO—-0.7B,03. The squares are the exper- imental data points of Singh et al. [12]. From Eq. (19) one obtains the molar fractions fc, = fsr=0.0366, fg = 0.3414, and fo =0.5884. These values can then be inserted in Eq. (10) in order to determine Ze for the glass. As shown in Fig. 3, the energy dependence of Ze is complicated in the low-energy range because of
Fig. 3. The curve shows the calculated effective atomic number of glass with composition 0.15CaO-0.15SrO—-0.7B,03. The squares are the exper- imental data points of Singh et al. [12]. From Eq. (19) one obtains the molar fractions fc, = fsr=0.0366, fg = 0.3414, and fo =0.5884. These values can then be inserted in Eq. (10) in order to determine Ze for the glass. As shown in Fig. 3, the energy dependence of Ze is complicated in the low-energy range because of
Fig. 4. The effective atomic number of a brass alloy with composition 16 at.% Zn—84 at.% Cu.
Fig. 4. The effective atomic number of a brass alloy with composition 16 at.% Zn—84 at.% Cu.
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