Abstract

An inexpensive, but versatile computer-controlled luminescence spectrometer has been developed for fluorescence, room-temperature phosphorescence (RTP), and RTP lifetime measurements. A continuum xenon-arc lamp was modulated with a rotating single-disk type chopper, and the chopping phase was accurately detected by a simple and flexible circuit. An integrated, menu-driven software package was developed for data acquisition, instrument control, and data manipulation with IBMXT compatible personal computer. The system developed has a number of advantages, compared with the conventional rotating-can type phosphoriscope, including increased sensitivity, high selectivity, and versatile applicability for short-lived RTP.

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