Determination of gross alpha beta surface contamination by handheld equipment

2019 ◽  
Author(s):  
Florinda Cfarku ◽  
Manjola Shyti ◽  
Irma Berdufi ◽  
Polikron Dhoqina ◽  
Elida Bylyku
Keyword(s):  
Surface Contamination ◽  
Gross Alpha ◽  
Alpha Beta

scholarly journals Rapid determination of gross alpha/beta activity in milk using liquid scintilation counter technique

2016 ◽  
Vol 31 (2) ◽  
pp. 179-183 ◽  
Author(s):  
Daniel Sas ◽  
Jiri Janda
Keyword(s):  
Rapid Determination ◽  
Scintillation Counter ◽  
Mass Scale ◽  
Beta Activity ◽  
Sample Treatment ◽  
Gross Alpha ◽  
Scintillation Cocktail ◽  
Beta Emitters ◽  
Alpha Beta

Rapid determination of gross alpha and beta emitters in milk by liquid scintillation counter is discussed. This method is based on direct addition of different types of milk into scintillation cocktail and therefore it is very promising for fast determination of alpha/beta activity due to direct alpha and beta separation, measurement in close 4p geometry and without sample treatment. The selected group of radionuclides was chosen with the respect to military significance, radio-toxicity, and possibility of potential misuse. As model radionuclides 241Am, 239Pu, and 90Sr were selected. The Liquid Scintilation Counter Hidex 300 SL equipped with triple-double-coincidence-ratio technique was used for sample measurement. The aim of the work was focused on comparison of different cocktails produced by Hidex and Perkin Elmer, choosing the best cocktail based on our measurement results and adjustment of its appropriate volume. Furthermore, the optimization of ratio between the volume of scintillation cocktail and the volume of urine was investigated with the respect to the model radionuclides. According to the obtained results, the efficiency for alpha emitters was greater than 85% and for beta, greater than 95%. The obtained results allowed this method to be used for rapid determination of gross alpha/beta activity in cases where time is an essence, such as first responders or mass-scale samples, where ordinary means suffer from lack of capacity or simply collapse under the onslaught.

Deconvolution of alpha liquid scintillation spectra for quantitative analysis of actinide elements in water samples

2004 ◽  
Vol 92 (3) ◽  
Author(s):  
Jean Aupiais
Keyword(s):  
Quantitative Analysis ◽  
Water Samples ◽  
Environmental Samples ◽  
Liquid Scintillation ◽  
Isotopic Ratio ◽  
Ratio Determination ◽  
Alpha Beta ◽  
Uranium Plutonium ◽  
Actinide Elements

SummaryThe reliability and accuracy of actinide measurement in environmental samples strongly depend on theThe intensity of the internal conversions for thorium, uranium, plutonium and americium have been calculated and normalised to the intensity of the main alpha transition. These data can be used to determine the activity of any above-mentioned actinide by alpha liquid scintillation with alpha/beta discrimination. The quantitative analysis and the isotopic ratio determination of several certified solutions of actinides demonstrate the validity of this approach.

Possibilities and limitations of color quench correction methods for gross alpha/beta measurements

2017 ◽  
Vol 122 ◽  
pp. 164-173 ◽  
Author(s):  
Ivana Stojković ◽  
Branislava Tenjović ◽  
Jovana Nikolov ◽  
Nataša Todorović
Keyword(s):  
Gross Alpha ◽  
Alpha Beta
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