Traditionally fluorescence and phosphorescence measurements are
made on fluorescence spectrometers using a DC source such as a 150
Watt xenon lamp. Differentiation between the fast decaying fluorescence
signal and the relatively long lived phosphorescence is temporally
obtained using a mechanical phosphoroscope. By periodically interrupting
the exciting light measurements are made at the instant of excitation
(fluorescence) or during the periods of darkness (phosphorescence). [Continues.]
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.