Study of Counting Efficiency with Triple to Double Coincidence Ratio in Liquid Scintillation Counter by using Geant4

2017 ◽  
Author(s):  
Tsukasa Aso ◽  
Takuro Masuda ◽  
Masanori Hara ◽  
Miki Shoji ◽  
Takayoshi Furusawa ◽  
...  
Keyword(s):  
Liquid Scintillation ◽  
Scintillation Counter ◽  
Counting Efficiency ◽  
Liquid Scintillation Counter ◽  
Double Coincidence

TRITIUM ANALYSIS IN URINE BY THE TRIPLE-TO-DOUBLE COINCIDENCE RATIO METHOD WITH THE HIDEX 300 SL LIQUID SCINTILLATION COUNTER

2019 ◽  
Vol 188 (2) ◽  
pp. 148-161
Author(s):  
Yannick Lecompte ◽  
Martine Rosset ◽  
Jérôme Loess ◽  
Nadine Chianea ◽  
Flora Jourquin ◽  
...  
Keyword(s):  
Liquid Scintillation ◽  
Scintillation Counter ◽  
Liquid Scintillation Counter ◽  
Ratio Method ◽  
Activity Measurement ◽  
Physical Parameters ◽  
Method Performance ◽  
Double Coincidence ◽  
Model Equations ◽  
Semi Empirical

Abstract The triple-to-double coincidence ratio (TDCR) method is a liquid scintillation primary method for the absolute activity measurement of pure β− and pure electron capture emitters. This method requires specific three-photomultiplier liquid scintillation counters. The aim of the present work is to assess the TDCR method performance for routine tritium analysis in urine using an HIDEX 300 SL, the only three-photomultiplier liquid scintillation counter designed for routine laboratories. The physical parameters and the semi-empirical Birks parameter (kB) of the prepared liquid scintillation source were firstly determined. TDCR model equations solving and detection efficiencies calculations for measured samples were performed by TDCR07c computing program. Accuracy, uncertainties and detection limit of TDCR method were assessed through the tritium analysis of six intercomparison urine samples. The results demonstrate that the analytical performance of the TDCR method implemented on the HIDEX 300 SL is conform to the recommendations for the monitoring of workers exposed to tritium.

scholarly journals Evaluation of a Prototype Low-Level Liquid Scintillation Multisample Counter

Radiocarbon ◽  
1992 ◽  
Vol 34 (3) ◽  
pp. 366-373 ◽  
Author(s):  
Sigurđur A. Einarsson
Keyword(s):  
System Performance ◽  
Figure Of Merit ◽  
Liquid Scintillation ◽  
Scintillation Counter ◽  
Counting Efficiency ◽  
Liquid Scintillation Counter ◽  
Low Level ◽  
Quartz Vial

A new, improved photomultiplier has been incorporated and a more efficient active guard installed in a single photomultiplier liquid scintillation counter. A special quartz vial was designed to improve the photoelectron cathode index (photoelectrons/keV), and thus, to reduce background. Four photomultipliers were installed so that four samples can be counted simultaneously. The measurements presented here cover background spectra and counting efficiency obtained under various conditions in the laboratory. These measurements and derived parameters, such as the figure of merit (E2/B) and the factor of merit (S/√B), are used to evaluate the system performance. Also presented are the results of measurements on the cathode index and further background spectra, obtained at an underground site.

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