Calculation of absorption parameters for selected narcotic drugs in the energy range from 1 keV to 100 GeV

The total mass attenuation coefficients (μ/ρ), total molecular (σ_t,m), atomic (σ_t,a) and electronic (σ_t,e) cross sections, effective atomic numbers (Z_eff) and electron density (N_E) were computed in the wide energy region from 1 keV to 100 GeV for the selected narcotic drugs such as morphine, heroin, cocaine, ecstasy and cannabis. The changes of μ/ρ, σ_t,m, σ_t,a, σ_t,e, Z_eff and N_E with photon energy for total photon interaction shows the dominance of different interaction process in different energy regions. The variations of μ/ρ, σ_t,m, σ_t,a, σ_t,e, Z_eff and N_E depend on the atom number, photon energy and chemical composition of narcotic drugs. Also, these parameters change with number of elements, the range of atomic numbers in narcotic drugs and total molecular weight. These data can be useful in the field of forensic sciences and medical diagnostic.