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Updated: Jul 6, 2026

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
Published on: January 30, 2020
Study of scattering effects in low-energy gamma-ray spectrometry
J Plagnard1, C Hamon, M C Lépy
1Laboratoire National Henri Becquerel, CEA Saclay, F-91191 Gif-sur-Yvette Cedex, France. johann.plagnard@cea.fr
Abstract:
The photon-scattering effect was studied in the low-energy range 15-80keV with planar and coaxial germanium detectors. Different experimental tests have been conducted with a point source, progressively reducing the matter around the radioactive deposit, to investigate the origin and characteristics of the different spectrum components due to scattered photons (bumps). These tests were completed by Monte Carlo simulations. Finally, a peak-shape calibration was performed using several radionuclides ((109)Cd, (241)Am, (133)Ba, (137)Cs and (152)Eu). This allowed in identifying the main contributions to the bumps and improving the spectra processing.
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