Gamma Radiation Method for the Determination of Density of Wood materials

Abstract

Mass attenuation coefficients of ten different types of wood materials were determined using gamma radiation of 1332 keV from 60Co source. Two mathematical models have been developed for the prediction of density using variation with relaxation length and half value layer of wood materials. A good agreement was observed (greater than 83%) between the measured values and the predicted model 1 and 2. Results show that Azadiracta indica has the highest relaxation length and the lowest mass attenuation coefficient, while Albizia saman has the least relaxation length and the highest mass attenuation coefficient. Results also show that Azadiracta indica has the highest half value layer and Albizia saman has the least half value layer.