Calculation of mass attenuation coefficient for Rhizophora as a tissue equivalent using MCNPX

Rhizophora wood exhibits characteristics of interaction with radiation similar to those of water. Recently, a novel model based on MCNP4C code has been proposed for calculation of mass attenuation coefficients for some polymers. The aim of this study is to determine the mass attenuation coefficients for Rhizophora wood in energy range 15.77-60 keV using this model. First, the mentioned model was utilized for soft tissue, breast and water and after validation with XCOM data, was used for the wood. The relative error was always less than 0.55%. The results were compared with XCOM data and good agreement was observed.