Wortelboer, G.F. (2021) Monte Carlo simulations for the GAINS spectrometer. Bachelor's Thesis, Physics.
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Abstract
The GAINS spectrometer at GELINA was built to measure cross sections of inelastic neutron reactions. The study of such reactions is of crucial importance to reactor simulations. The measurements are performed using prompt gamma-rays: the gamma radiation emitted by excited nuclei. In the present paper we use the Monte Carlo package Geant4 to develop simulations capable of reproducing the spectra measured by GAINS. Ultimately it should be able to model the decay of any element, given its decay scheme. In order to produce reliable spectra it is necessary to calibrate the photopeak efficiencies and energy resolution. In doing so, the measured spectrum of Eu-152 was used. After fitting several parameters, the agreement between the simulated and measured efficiencies was found to be good. The energy resolution was fitted using a simple polynomial, resulting in a reasonable fit for most detectors. Finally, the procedure of simulating nuclear decay is discussed and the spectrum of Eu-152 is used as a performance test. Several features of the measured spectra can be observed in the simulated spectra. This includes the positions of photopeaks as well as their relative intensities.
| Item Type: | Thesis (Bachelor's Thesis) |
|---|---|
| Supervisor name: | Kavatsyuk, M. and Kalantar-Nayestanaki, N. |
| Degree programme: | Physics |
| Thesis type: | Bachelor's Thesis |
| Language: | English |
| Date Deposited: | 07 Jul 2021 10:35 |
| Last Modified: | 07 Jul 2021 10:35 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/24994 |
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