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.

Gamma spectrometry

4th Collaborative Material Exercise (CMX-4)

Nuclear Forensics International Working

True coincidence summing

Group (ITWG)

Isotope ratio



Henrik Ramebäck

Chalmers, Chemistry and Chemical Engineering, Energy and Material

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

T. Vidmar

Belgian Nuclear Research Center (SCK CEN)

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

Subject Categories

Subatomic Physics

Condensed Matter Physics



More information

Latest update