TY - JOUR
T1 - Digital positron lifetime spectrometer for measurements of radioactive materials
AU - Jardin, M.
AU - Lambrecht, M.
AU - Rempel, A.
AU - Nagai, Y.
AU - van Walle, E.
AU - Almazouzi, A.
PY - 2006/12/1
Y1 - 2006/12/1
N2 - A digital positron lifetime spectrometer for the measurements of high-level radioactive materials has been constructed and successfully tested. The equipment consists of a digital oscilloscope and three movable scintillation detectors operating in triple-coincidence mode. The time resolution of 188 ps full-width at half-maximum (FWHM) is achieved for the positron lifetime measurements of radioactive specimens. The set-up has been calibrated, optimised and tested by comparison of the results of well-known material with and without high background radiation. This paper reports on the radiological shielding, electronic update, stability and the performance of this new spectrometer that has been installed in the controlled area of the Laboratory for High and Medium level Activity (LHMA) at SCK•CEN.
AB - A digital positron lifetime spectrometer for the measurements of high-level radioactive materials has been constructed and successfully tested. The equipment consists of a digital oscilloscope and three movable scintillation detectors operating in triple-coincidence mode. The time resolution of 188 ps full-width at half-maximum (FWHM) is achieved for the positron lifetime measurements of radioactive specimens. The set-up has been calibrated, optimised and tested by comparison of the results of well-known material with and without high background radiation. This paper reports on the radiological shielding, electronic update, stability and the performance of this new spectrometer that has been installed in the controlled area of the Laboratory for High and Medium level Activity (LHMA) at SCK•CEN.
KW - Digital
KW - Digital oscilloscope
KW - Neutron-irradiated RPV steels
KW - Photomultipliers
KW - Positron annihilation
KW - Positron-lifetime spectroscopy
KW - Three-detector set-up
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U2 - 10.1016/j.nima.2006.08.087
DO - 10.1016/j.nima.2006.08.087
M3 - Article
AN - SCOPUS:33751256000
SN - 0168-9002
VL - 568
SP - 716
EP - 722
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
IS - 2
ER -