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Updated: May 23, 2026

Angle-resolved Photoemission Spectroscopy At Ultra-low Temperatures
Published on: October 9, 2012
Airborne spectrometry: extraction of low energy γ-rays using two or three spectral windows
Nicolas Martin-Burtart1, Ludovic Guillot, Abdel-Mjid Nourreddine
1CEA, DAM, DIF, F-91297 Arpajon, France. nicolas.martin-burtart@cea.fr
Abstract:
Airborne γ-ray spectrometry with NaI(Tl) is a recognized tool for emergency mapping. The maps produced usually look for natural isotopes ((40)K, (238)U, (232)Th) and (137)Cs due to the Chernobyl accident. Nowadays a new thematic emerges as nuclear materials tracking. Such materials emitting at low energies require new algorithms and a new method is presented here based on counts observed in two or three spectral windows. Since altitude is an important factor to be taken into account, an improvement is proposed to follow flight altitude changes. An extension to medium energies is proposed and compared to windows methods and to peak detection.
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