MAGIX, a new software for the analysis of complex gamma spectra
I Espagnon1, P G Allinei2, A C Simon1
1Université Paris-Saclay, CEA, List, F-91120, Palaiseau, France.
Summary
MAGIX software automatically analyzes gamma and X-ray spectra for severe accident diagnosis. It identifies radionuclides and calculates activities, even with varying detector resolutions and experimental setups.
Area of Science:
- Nuclear Engineering
- Radiochemistry
- Spectroscopy
Background:
- Severe reactor accidents generate complex gamma and X-ray spectra.
- Interpreting these spectra during crises is challenging, as highlighted by the Fukushima accident.
- Existing methods may lack robustness in data interpretation.
Purpose of the Study:
- To introduce the MAGIX code for automatic gamma and X-ray spectral analysis.
- To enable robust radionuclide identification and activity calculation in severe accident scenarios.
- To assess MAGIX performance across diverse detector types and experimental conditions.
Main Methods:
- Development of the MAGIX (Automatic Gamma and X-ray Measurement) software.
- Implementation of automatic radionuclide identification and activity calculation algorithms.
- Analysis of simulated spectra using various detector resolutions (HPGe, CZT, LaBr3) and experimental setups (energy slope, range, absorbers).
Main Results:
- MAGIX provides complete and automatic spectral analysis, identifying radionuclides and calculating activities.
- The software accommodates detectors with both high (HPGe) and medium (CZT, LaBr3) resolution.
- MAGIX can calculate relative detection efficiency, reducing reliance on pre-defined efficiency curves.
- Analysis accuracy remained high with increasing energy slopes but decreased with lower detector resolution.
Conclusions:
- MAGIX offers a robust solution for interpreting complex gamma and X-ray spectra in severe accident diagnosis.
- The software's flexibility in handling different detectors and setups enhances its applicability.
- While MAGIX shows good performance, resolution degradation impacts the accuracy of radionuclide identification.
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