Determination of attenuation parameters and energy absorption build-up factor of amine group materials

We have computed radiological parameters of some C- H- N- O based amine group bio material in the energy range 122–1330 keV with the gamma ray count by narrow beam geometry. The NaI(Tl) detector with 8 K multichannel analyser was used having resolution 6.8% at 663 keV. The energy absorption buildup factor (EABF) was determined by using Geometric Progression (G-P) fitting method up to penetration depth of 40 mfp at energy 0.015–15 MeV. The NIST XCOM data were compared with the experimental value and we observed (3–5%) difference. The comparative study of effective atomic number and effective electron density in the energy range 122–1330 keV using Gaussian fit for accuracy were performed. The amino acid has the highest EABF value at 0.1 MeV and the variation in EABF with penetration depth up to 1–40 mean free path (mfp). The calculated radiological data of biological material are applicable in medical physics and dosimetry. - Highlights: • We have been studied behaviour of µm, µ_m, Z_eff and N_eff at energy 122–1330 keV. • The Gaussian and linear fitting method used for peak accuracy for Z_eff and N_eff. • The energy absorption buildup factor of amine group materials has been calculated by using G-P fitting method. • The data of EABF are applicable for sheading of biological materials.