Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/81647
Type: Artigo de periódico
Title: OPTIMIZATION OF A BOXCAR INTEGRATOR AVERAGER SYSTEM FOR EXCITED-STATE LIFETIME MEASUREMENTS
Author: NOVO, JBM
PESSINE, FBT
Abstract: The instrumental distortions due to adjustable parameters of the SR250 boxcar integrator/averager system and a pulsed-laser luminescence spectrometer on the excited-state lifetime decay waveforms were investigated. A theoretical model which takes into account the exponential moving average for this instrument and also RC distortion on the time-dependent luminescence signal is presented. An analytical expression relating the sample's excited-state lifetime and the adjustable instrumental parameters such as laser repetition rate, gate scan time, gate width, scan width, number of samples averaged, and RC time constants from cables, termination, and other coupled instruments was obtained. Computer simulation using this expression was performed, and the good agreement found between the simulated and the experimental decay curves showed that the proposed mathematical equation can be applied to the optimization of instrumental parameters as well as in least-squares data reduction methods for luminescence kinetics measurements.
Subject: TIME RESOLUTION
DECAY CURVES
LIFETIME
BOXCAR INTEGRATOR
LUMINESCENCE
COMPUTER APPLICATION
Editor: Soc Applied Spectroscopy
Rights: aberto
Date Issue: 1992
Appears in Collections:Unicamp - Artigos e Outros Documentos

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