Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, Volume 155, 4 1 2019, Pages 108926 Mean atomic number analysis by the coherent to backscattering intensity ratios at 59.54 and 661.62 photon energies. Akkuş T, Yılmaz D
In this work, the qualitative analysis has been performed by using ratio of coherent to backscattering intensity ratios. The samples in the mean atomic number range 4.268≤Z‾≤5.786 and 9.743≤Z‾≤83.00 were prepared by using dilution technique. 59.54 and 661.62 keV photon energies are obtained from the radioactive point sources of 241Am and 137Cs an activity of 0.43-0.20 MBq, respectively. The scattered gamma rays were counted by a HPGe detector with a resolution of 182 eV at 5.9 keV. The obtained intensity ratios are plotted as function of the mean atomic number and constituted a best-fit-curve. The correlation coefficients for the prepared samples in the mean atomic number range 4.268≤Z‾≤5.786 are 0.976 and 0.970 at 59.54 and 661.62 keV photons, respectively. The correlation coefficients for the prepared samples in the mean atomic number range 9.743≤Z‾≤83.00 are 0.964 and 0.967 at 59.54 and 661.62 keV photons, respectively. It is observed that there was a high correlation between coherent to backscattering intensity ratio and the mean atomic numbers. It was concluded that the recommended intensity ratio can be used for qualitative analysis.
