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

C. Domergue (1) , J. Riffaud (2) , M. -C. Lepy (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 - Laboratoire National Henri Becquerel
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.

Keywords: Self-attenuation; Fluorescence; X-ray; Nb93m; Rh103m; Efficiency calibration

Domains: Physics [physics]; Nuclear Experiment [nucl-ex]; Physics [physics]; Physics [physics]; Instrumentation and Detectors [physics.ins-det]

C. Domergue, J. Riffaud, M. -C. Lepy, 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⟩