Photomultiplier nonlinear response in time-domain laser-induced luminescence spectroscopy

Leandro José Bossy Schip, Bruno Phelippe Buzelatto, Fábio Roberto Batista, Carlos Jorge da Cunha, Lauro Camargo Dias Jr., João Batista Marques Novo
2007 Química Nova  
Recebido em 16/8/05; aceito em 2/3/06; publicado na web em 26/9/06 A new procedure to find the limiting range of the photomultiplier linear response of a low-cost, digital oscilloscope-based timeresolved laser-induced luminescence spectrometer (TRLS), is presented. A systematic investigation on the instrument response function with different signal input terminations, and the relationship between the luminescence intensity reaching the photomultiplier and the measured decay time are described.
more » ... ime are described. These investigations establish that setting the maximum intensity of the luminescence signal below 0.3V guarantees, for signal input terminations equal or higher than 99.7 ohm, a linear photomultiplier response.
doi:10.1590/s0100-40422007000100034 fatcat:7caaatod6fb3jccysqabqr2boe