Modeling an HPGe detector response to gamma-rays using MCNP5 code
| Autor: | R. R. Sabitova, Sergey V. Bedenko, Irina Valentinovna Prozorova, Nima Ghal-Eh |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
010308 nuclear & particles physics business.industry Dead layer Gamma ray General Physics and Astronomy Experimental data Statistical and Nonlinear Physics 01 natural sciences 030218 nuclear medicine & medical imaging Computer Science Applications Semiconductor detector 03 medical and health sciences 0302 clinical medicine Optics Computational Theory and Mathematics 0103 physical sciences Code (cryptography) business Hpge detector Mathematical Physics |
| Zdroj: | International Journal of Modern Physics C. 30:1950099 |
| ISSN: | 1793-6586 0129-1831 |
| Popis: | The response function is the important information for the precise interpretation of experimental data and also for characterizing the developing nuclear instruments. Measurement of the response function normally requires a number of mono-energetic gamma-ray sources, a long acquisition time and an appropriate experimental setup. The Monte Carlo method, as an alternative to response function measurement, has widely been used and recommended. In this study, a computational model of an HPGe detector has been developed by using the MCNP5 code. To validate the simulated model, the simulations from mono-energetic sources have been compared to the corresponding measured data. Any deviation from the measurement could be attributed to the unmodeled details of the detector crystal, so they needed adjustment. Moreover, an analysis has been undertaken on the dependency of detection efficiency on the dead layer thickness of the germanium crystal. Having developed a computational model of the crystal, a set of correction factors was extracted to take into account the gamma-ray self-absorption within the source volume. The simulated model of the HPGe detector in this study can be used to calculate the detection efficiency when the samples are not of the standard geometry which require self-absorption considerations. |
| Databáze: | OpenAIRE |
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