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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/784

Title: The IFIN-HH triple coincidence liquid scintillation counter
Authors: Razdolescu, AC
Broda, R
Cassette, P
Simpson, BRS
Van Wyngaardt, WM
Keywords: TDCR method
Discrimination level
Liquid scintillation counter
IFIN-HH triple coincidence liquid scintillation
Issue Date: Oct-2006
Publisher: Pergamon-Elsevier Science Ltd
Citation: Razdolescu, AC, et al. 2006. The IFIN-HH triple coincidence liquid scintillation counter. Applied Radiation and Isotopes, vol. 64(10), pp 1510-1514
Abstract: The paper summarizes the IFIN-HH triple coincidence liquid scintillation counter used for the implementation of the TDCR method. The electronic unit was recently extended to record the three individual double coincidence ratios to take into account the differences in the quantum efficiencies of the three-photomultiplier tubes. Some details of the electronic system and the data processing are given. The critical point of a TDCR counter is to adjust correctly the discriminator levels on the three channels under the single electron peak. The paper describes the method of adjustment based on the evolution of the dark counting rate versus the discriminator level. Also indicated is the influence of the discrimination level on the activity results as measured at IFIN-HH using a 3 H standard. The performances of the IFIN-HH TDCR counter was checked against the measurement results of the TDCR counters of CSIR NML (South Africa), RC (Poland) and LNHB (France). A set of ready-to-measure Ni-63 sources in liquid scintillator, in sealed counting vials, was prepared and dispatched for measurement to all these laboratories. The paper describes designs of the TDCR counters used. An analysis and discussion of the measurement results is given.
Description: Available from: http://www.sciencedirect.com
URI: http://hdl.handle.net/10204/784
ISSN: 0969-8043
Appears in Collections:Metrology
General science, engineering & technology

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