On scattering effects for volume sources in low-energy photon spectrometry

Marie-Christine Lépy (1) , Laurine Brondeau (1) , Laurent Ferreux (1) , Sylvie Pierre (1)

1 LNHB (CEA, LIST) - Laboratoire National Henri Becquerel (CEA, LIST)

In this study, different aspects of the Compton scattering inside volume sources are illustrated using experimental approach and Monte Carlo simulation. For the low-energy range (below 100 keV) scattered events represents around 30% of the whole spectrum. Influence of the source-detector geometry is discussed. The scattering effects induce strong differences in spectrum shape for different geometrical conditions. This should influence efficiency transfer factors. A new approach is proposed, including the scattered events, to avoid complex peak area determination.

Mots clés: PENELOPE; Monte Carlo simulation; Compton scattering; Low energy; low-energy; efficiency calibration

Domaines: Physique Nucléaire Théorique [nucl-th]; Physique Nucléaire Expérimentale [nucl-ex]; Modélisation et simulation; Calcul [stat.CO]

Marie-Christine Lépy, Laurine Brondeau, Laurent Ferreux, Sylvie Pierre. On scattering effects for volume sources in low-energy photon spectrometry. Applied Radiation and Isotopes, 2013, 81, pp.71 - 75. ⟨10.1016/j.apradiso.2013.03.071⟩. ⟨cea-01802412⟩