Well-Type Xenon Gamma-Ray Spectrometer

Modern gamma-ray spectrometers should exhibit high spectrometric characteristics (energy resolution, efficiency, radiation resistance, operating temperature range, and energy consumption), which provide a possibility of their use in various scientific studies, including nuclear medicine. This paper is devoted to the development of a well-type xenon gamma-ray spectrometer (WT-XGRS) for measuring the gamma activity of pharmaceuticals and determining their isotopic composition. The general design of this device is developed using the parametric computer-aided design modeler (FreeCAD). Using the Monte Carlo method (Geant4 package), model experiments are performed to determine the main physical characteristics of the fabricated equipment. The radioisotope Ba-133 is used as a gamma-ray source. The dependence of the registration efficiency of gamma quanta on their energy for a WT-XGRS, as well as on the location of the point radioactive pharmaceutical inside the well, is obtained. The calculated results are analyzed and the possibility of using this equipment in the field of nuclear medicine is considered.