An optimization of energy window settings for positron annihilation lifetime spectrometers

✍ Scribed by T. Sharshar; M.L. Hussein

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 317 KB
• Volume: 546
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2005.02.045

✦ Synopsis

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 g-rays.