The jackknife as an approach for uncertainty assessment in gamma spectrometric measurements of uranium isotope ratios
Artikel i vetenskaplig tidskrift, 2010

The jackknife as an approach for uncertainty estimation in gamma spectrometric uranium isotope ratio measurements was evaluated. Five different materials ranging from depleted uranium (DU) to high enriched uranium (HEU) were measured using gamma spectrometry. High resolution inductively coupled plasma mass spectrometry (ICP-SFMS) was used as a reference method for comparing the results obtained with the gamma spectrometric method. The relative combined uncertainty in the gamma spectrometric measurements of the U-238/U-235 isotope ratio using the jackknife was about 10-20% (k = 2), which proved to be fit-for-purpose in order to distinguish between different uranium categories. Moreover, the enrichment of U-235 in HEU could be measured with an uncertainty of 1-2%. (C) 2010 Elsevier B.V. All rights reserved.

Uncertainty

Uranium

samples

enrichment

Gamma spectrometry

code

mgau

Isotope ratio

Enrichment

Författare

Henrik Ramebäck

Totalförsvarets forskningsinstitut (FOI)

Anna Vesterlund

Totalförsvarets forskningsinstitut (FOI)

A. Tovedal

Totalförsvarets forskningsinstitut (FOI)

U. Nygren

Totalförsvarets forskningsinstitut (FOI)

L. Wallberg

Strålsäkerhetsmyndigheten (SSM)

E. Holm

Statens stralevern

Christian Ekberg

Chalmers, Kemi- och bioteknik, Kärnkemi

Gunnar Skarnemark

Chalmers, Kemi- och bioteknik, Kärnkemi

Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

0168-583X (ISSN)

Vol. 268 2535-2538

Ämneskategorier

Kemi

DOI

10.1016/j.nimb.2010.05.055