Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 546, Issue 3, Pages 584-590Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2005.02.045
Keywords
positron lifetime spectrometer; fuzzy technique; energy window settings; multi-parameter acquisition system
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An optimization of energy window settings for a positron annihilation lifetime spectrometer is necessary for high performance. A spectrometer employing the fast-fast coincidence technique with a pair of plastic scintillation detectors was used in this study. In the present spectrometer, the data are acquired in event-by-event list mode with a multiparameter acquisition system. A fuzzy approach is applied for determination of the optimal values of the energy windows using the minimum-type and product-type fuzzy decisions. The performance of the used spectrometer is obviously improved with the optimal widths of the energy windows of both start and stop gamma-rays. (c) 2005 Elsevier B.V. All rights reserved.
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