Intérêt de la scintillation liquide à triples coïncidences dans la surveillance de l’exposition interne des travailleurs exposés au tritium

Abstract : The triple-to-double coincidence ratio (TDCR) method is based on a physical and statistical scintillation photon distribution model and its detection probability by photomultipliers. The TDCR method requires the use of special three-photodetector liquid scintillation counters. The aim of the present work is to assess the TDCR method performance for tritium analysis in urine using a HIDEX 300 SL™ liquid scintillation counter. Firstly, necessary parameters for the application of the TDCR method, were specifically determined for the scintillator used. Two approaches were then considered for the Birks parameter (kB) optimization: grey filters and chemical quenching. TDCR model equations solving and detection efficiencies calculations for measured samples were performed by TDCR07c computing program. The results obtained after tritium analysis of six intercomparison urine samples have proven the accuracy of this TDCR method. The measurement uncertainties are comparable to those obtained with conventional double photomultiplier liquid scintillation counters. However, because of the intrinsic performance of the HIDEX 300 SL™, achieved detection limits are slightly higher than with conventional liquid scintillation counters. They are nevertheless appropriate for the monitoring of workers.
Document type :
Master Thesis
Complete list of metadatas

Cited literature [67 references]  Display  Hide  Download

https://dumas.ccsd.cnrs.fr/dumas-02023345
Contributor : Cnam - Service Commun de la Documentation - Bibliothèque Centrale <>
Submitted on : Friday, July 19, 2019 - 8:54:05 AM
Last modification on : Thursday, July 25, 2019 - 1:23:01 AM

File

2018.TH.Lecompte.Yannick.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : dumas-02023345, version 1

Collections

Citation

Yannick Lecompte. Intérêt de la scintillation liquide à triples coïncidences dans la surveillance de l’exposition interne des travailleurs exposés au tritium. Autre. 2018. ⟨dumas-02023345⟩

Share

Metrics

Record views

24

Files downloads

13