Diffraction peaks restoration and extraction in energy dispersive X-ray diffraction

Ferréol Soulez (1) , Charles Crespy (1) , Valerie Kaftandjian (1) , Philippe Duvauchelle (1)

1 CNDRI - Controle Non Destructif par Rayonnements Ionisants

This paper proposes a method to restore energy dispersive X-ray diffraction (EDXRD) spectra and to extract diffraction peaks. It follows a maximum a posteriori approach using a physical model of the formation of the EDXRD data to remove blur caused by both the detector and the coarse angular resolution of X-ray tube based EDXRD setups. It separates peaks caused by the diffraction by crystalline material from a countinuous background. Tested on real data (graphite and NaCl), our algorithm acheived to detect diffraction peaks with a good precision (about 1 keV depending on the peak position) even at high energy where very few photons were measured.

Mots clés: spectrum restoration; inverses problems; Non Destructive Testing; Energy Dispersive X ray Diffraction

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Ferréol Soulez, Charles Crespy, Valerie Kaftandjian, Philippe Duvauchelle. Diffraction peaks restoration and extraction in energy dispersive X-ray diffraction. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2011, pp.10.1016/j.nima.2011.06.037. ⟨10.1016/j.nima.2011.06.037⟩. ⟨hal-00605917⟩