Evaluation of the total and intrinsic efficiencies of a 3 in x 3 in NaI(Tl) crystal by using the hybrid Monte Carlo method

Abstract

In this work, we developed a Fortran code (CalcTotEff) to calculate the intrinsic and total efficiencies of a 3 in x 3 in NaI(Tl) crystal by using the hybrid Monte Carlo method. To confirm the reliability of the results of the total efficiency calculated, an experimental arrangement was set up. The results showed the compatibility between the calculated and experimental data. We also used the hybrid Monte Carlo method to evaluate the dependence of the intrinsic efficiency on d/R ratio (d is the distance from the surface detector to point source and R is the radius of NaI(Tl) crystal).