Contribution to continuum estimation in gamma spectrum by observation of local minima

Kélian This (1) , Laurent Le Brusquet (2) , Adrien Frigerio (1) , Sébastien Colas (1) , Pascal Bondon (2)

1 CEA - Commissariat à l'énergie atomique et aux énergies alternatives
2 L2S - Laboratoire des signaux et systèmes

This paper presents a method to estimate the continuum of a gamma rays spectrum through the observation of local minima. The method is simple, automatable and has a large scope of application. Indeed, it is not limited by the peaks width, and consequently it is usable with GeHP as well as with scintillators spectra. In the extent where the method exploits signal properties, its operation is easily explainable. It involves a limited set of meaningful parameters for which an adjustment is proposed. The potential of this method is demonstrated through simulations but also through real gamma spectrometry measurements.

Mots clés: gamma spectrometry; continuum estimation; baseline correction method; peak characterization; local minima

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

Kélian This, Laurent Le Brusquet, Adrien Frigerio, Sébastien Colas, Pascal Bondon. Contribution to continuum estimation in gamma spectrum by observation of local minima. 24th International Conference on System Theory, Control and Computing (ICSTCC 2020), Oct 2020, Sinaia, Romania. pp.937-942, ⟨10.1109/icstcc50638.2020.9259717⟩. ⟨hal-02985542⟩