Improvement of the activity measurement method for solid dosimeters emitting X-rays

C. Domergue (1) , Jonathan Riffaud (2) , Marie-Christine Lépy (2) , C. Destouches (1) , N. Thiollay (1) , H. Philibert (1) , O. Vigneau (3) , L. Gravier (3) , J. M. Girard (1) , J. Bonora (1)

1 LDCI - Laboratoire de Dosimétrie, de Contrôle-commande et Instrumentation
2 LNHB (CEA, LIST) - Laboratoire National Henri Becquerel (CEA, LIST)
3 LARC - Laboratoire d'Analyses Radiochimiques et Chimiques

Today, there is growing interest for neutrons in the intermediate energy range between 100 keV and 1 MeV, which are responsible for damaging materials in reactor. To improve this deficiency, we use rhodium and niobium which, through the inelastic neutron scattering reaction, leads to the formation of Rh-103m and Nb-93m low-energy X-emitters. This paper describes the improvements and validation made on this type of complex measurement by X spectrometry: self-attenuation, fluorescence correction, and emission intensity were poorly known previously.

Mots clés: Self-attenuation; Fluorescence; X-rays; Nb93m; Rh103m; Efficiency calibration; metrology; ionizing radiation; radioactivity; neutrons; X-ray spectrometry; spectrometry; Primary activity measurement; Decay data measurement; fluorescence

Domaines: Physique Nucléaire Expérimentale [nucl-ex]; Instrumentations et Détecteurs [physics.ins-det]

C. Domergue, Jonathan Riffaud, Marie-Christine Lépy, C. Destouches, N. Thiollay, et al.. Improvement of the activity measurement method for solid dosimeters emitting X-rays. Applied Radiation and Isotopes, 2018, 134 (SI), pp.182-189. ⟨10.1016/j.apradiso.2017.10.004⟩. ⟨cea-01803821⟩