Abstract
The mass attenuation coefficients (mu/rho) for different parts (root, flower, stem, and leaf) of three medicinal aromatic plants (Teucriurn chamaedrys L. subsp. sinuatum, Rheum ribes, and Chrysophthalmum montanum) were measured using an Am-241 photon source in a stable geometry and calculated using the Monte Carlo N-Particle Transport Code System-extended (MCNPX) code and the WinXCOM program. The experimental and theoretical MCNPX and WinXCOM values exhibited good agreement. The measured mass attenuation coefficient values were then used to compute the effective atomic number (Z(eff)) and electron density (N-E) of the samples. The results reveal that S1-S (stem of Teucriurn chamaedrys L. subsp. sinuatum) has the highest values of mu/rho and Z(eff).