On the accuracy of gamma spectrometric isotope ratio measurements of uranium
Journal article, 2016

The isotopic composition of uranium was measured using high resolution gamma spectrometry. Two acid solutions and two samples in the form of UO2 pellets were measured. The measurements were done in close geometries, i.e. directly on the endcap of the high purity germanium detector (HPGe). Applying no corrections for count losses due to true coincidence summing (TCS) resulted in up to about 40% deviation in the abundance of U-235 from the results obtained with mass spectrometry. However, after correction for TCS, excellent agreement was achieved between the results obtained using two different measurement methods, or a certified value. Moreover, after corrections, the fitted relative response curves correlated excellently with simulated responses, for the different geometries, of the HPGe detector.

4th Collaborative Material Exercise (CMX-4)

True coincidence summing

Group (ITWG)

Isotope ratio

Nuclear Forensics International Working

Uranium

Gamma spectrometry

Author

Henrik Ramebäck

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry

Petra Lagerkvist

Swedish Defence Research Agency (FOI)

S. Holmgren

Swedish Defence Research Agency (FOI)

S. Jonsson

Swedish Defence Research Agency (FOI)

B. Sandstrom

Swedish Defence Research Agency (FOI)

A. Tovedal

Swedish Defence Research Agency (FOI)

Anna Vesterlund

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry

T. Vidmar

Belgian Nuclear Research Center

J. Kastlander

Swedish Defence Research Agency (FOI)

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

0168-9002 (ISSN)

Vol. 815 57-61

DOI

10.1016/j.nima.2016.01.056

More information

Latest update

2/27/2018