Modeling of germanium detector and its sourceless calibration

• Main Authors: Steljić Milijana, Milošević Miodrag, Beličev Petar
• Format: Article
• Language: English
• Published: VINCA Institute of Nuclear Sciences 2008-01-01
• Series: Nuclear Technology and Radiation Protection
• Subjects: gamma-ray spectrometry; HPGe modeling; sourceless calibration; Monte Carlo method
• Online Access: http://www.doiserbia.nb.rs/img/doi/1451-3994/2008/1451-39940802051S.pdf

The paper describes the procedure of adapting a coaxial high-precision germanium detector to a device with numerical calibration. The procedure includes the determination of detector dimensions and establishing the corresponding model of the system. In order to achieve a successful calibration of the system without the usage of standard sources, Monte Carlo simulations were performed to determine its efficiency and pulse-height response function. A detailed Monte Carlo model was developed using the MCNP-5.0 code. The obtained results have indicated that this method represents a valuable tool for the quantitative uncertainty analysis of radiation spectrometers and gamma-ray detector calibration, thus minimizing the need for the deployment of radioactive sources.