A simple method for self-attenuation correction in Pb-210 activity measurement in a well-type HPGe detector

摘要

A simple method for Pb-210 determination in a well-type detector for matrix with apparent densities ranging from rho = 0.430 g cm(-3) to rho = 2.037 g cm(-3) is presented. Ten spiked samples of Pb-210 were prepared to obtain the detector efficiency as a quadratic function of the matrix density. Then this equation was validated and successfully used to measure Pb-210 concentration activity in other samples. The equation proposed in this work is specific for each germanium detector; however it is proposed an extrapolation of the method to other well-type germanium detector by preparing a spiked sample and determining the efficiency for Pb-210.