TY - JOUR
T1 - On the accuracy of gamma spectrometric isotope ratio measurements of uranium
AU - Ramebäck, H.
AU - Lagerkvist, P.
AU - Holmgren, S.
AU - Jonsson, S.
AU - Sandström, B.
AU - Vesterlind, A.
AU - Tovedal, A.
AU - Vidmar, Tim
AU - Kastlander, A.
N1 - Score=10
PY - 2016
Y1 - 2016
N2 - 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 235U 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.
AB - 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 235U 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.
KW - uranium
KW - isotope ratio
KW - Gamma spectrometry
KW - True coincidence summing
KW - Nuclear Forensics International Working Group (ITWG)
KW - 4th Collaborative Material Exercise (CMX-4)
UR - http://ecm.sckcen.be/OTCS/llisapi.dll?func=ll&objaction=overview&objid=19603893
U2 - 10.1016/j.nima.2016.01.056
DO - 10.1016/j.nima.2016.01.056
M3 - Article
SN - 0168-9002
VL - 815
SP - 57
EP - 61
JO - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
ER -