Study Effective Atomic Numbers and Attenuation Cross-Section of Caprylic Acid by Using Gamma Ray Sources

Measured the effective atomic number(Z_eff), effective electron density (N_eff), atomic cross-section (б_t)and electronic cross-section (б_e)depending on the amount of mass attenuation coefficient, the mass attenuation coefficients (μ_m)measured for fatty acid "Caprylic" C₈H₁₆O₂by using Gamma ray radiation(γ), emitted from sources Co⁵⁷, Ba¹³³, Na²², Cs¹³⁷, Mn⁵⁴, and Co⁶⁰with energies from 122 to1330 keV. We used scintillation NaI(Tl) detector with resolution 8.2% (at 662keV ). The attenuation coefficient data were then used to obtain the effective atomic numbers (Z_eff), and effective electron densities (N_eff), atomic cross-section (б_t)and electronic cross-section (б_e) off atty acids. It was observed that the effective atomic number (Z_eff) and effective electron densities (N_eff) initially decrease and tend to be almost constant as a function of gamma-ray energy. Z_eff and N_eff experimental values showed good agreement with the theoretical. Data on interaction of photons of energy (below 1500 keV) with biological compounds are used in radiation therapy, especially for dose calculations. (paper)