Absolute standardization of 241Pu by the TDCR technique and effect of the beta spectral shape

The NMISA participated in the 2010 international key comparison of 241Pu, standardizing the inter-comparison solution by the TDCR efficiency calculation technique. Special attention was paid to ensure accurate efficiency calculation for this low-energy, pure beta-emitter: in particular the effect of...

Full description

Saved in:
Bibliographic Details
Published in:Applied radiation and isotopes 2012-09, Vol.70 (9), p.2188-2194
Main Authors: van Wyngaardt, W.M., Simpson, B.R.S., van Staden, M.J., Lubbe, J.
Format: Article
Language:English
Subjects:
Algorithms
Beta spectral shape
Calibration
Half-Life
Internationality
Liquid scintillation counting
Plutonium - analysis
Plutonium - standards
Plutonium-241
Radiation Dosage
Radiometry - instrumentation
Radiometry - standards
Reference Standards
Reference Values
TDCR technique
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The NMISA participated in the 2010 international key comparison of 241Pu, standardizing the inter-comparison solution by the TDCR efficiency calculation technique. Special attention was paid to ensure accurate efficiency calculation for this low-energy, pure beta-emitter: in particular the effect of low-energy stopping powers on the calculation of ionization quenching was assessed and an optimal value for the quench parameter, kB, was determined. In addition, phototube efficiency mismatch was accounted for by a software minimization technique. The effect of the beta spectral shape on the activity extracted from data analysis was assessed and found to be significant. Based on the results of this work we propose a new value for the average beta-particle energy. ► Absolute standardization of 241Pu by the TDCR efficiency calculation technique. ► Assessment of the effect of the beta spectral shape on the activity determination. ► Refinement of the LSC efficiency calculation.
ISSN:0969-8043
1872-9800
DOI:10.1016/j.apradiso.2012.02.094