Experimental validation of corrections factors for γ–γ and γ–X coincidence summing of 133Ba, 152Eu, and 125Sb in volume sources

Abstract

True coincidence summing correction factors for 133 Ba, 152 Eu and 125 Sb were determined experimentally for a small volume source and compared with correction factors obtained with three softwares (EFFTRAN-X, GESPECOR and VGSL). The radionuclides investigated have a relatively challenging decay scheme and their spectra are known to suffer from losses due to summation (γ-γ, γ-X and X-X) when measured at close distances on a HPGe detector sensitive to low energy photons. This study shows that the softwares were in good agreement with each other and the experimental data and the calculated activity was consistent with the activity in the volume source.

Optimization of HPGe detector response using fast and reliable method

“…Co in ci dence sum ming cor rec tions for the point sources at each mea sured peak en ergy (E i ) were taken into con sid er ation. The co in ci dence sum ming cor rection fac tor (F corr ) was cal cu lated by es tab lish ing the ratio be tween the cer ti fied ac tiv ity (A(E i )) of the radionuclide and the cal cu lated ac tiv ity (A cal (E i )) from the eval u a tion of the gamma-ray spec tra [39].…”