title: Laser phosphoroscope and applications to room-temperature phosphorescence.
abstract: A simple phosphoroscope with no moving parts is described. In one scan the total luminescence, the long-lived phosphorescence, and the short-lived fluorescence can be determined. A 50% duty cycle excitation from a diode laser is used to excite the sample, and from the digitized waveform  the phosphorescence is extracted from the off period, the total emission from the full cycle, and the fluorescence from the on period corrected for the phosphorescence contribution. The performance of the system is demonstrated using room-temperature phosphorescence of organic dyes in boric  acid glasses, a multi-emissive boron-polymer dye, and a europium chelate.
authors: Chemistry Department, University of Virginia, Charlottesville, Virginia 22904, USA.
authors: Sarah J
authors: SJ
authors: Payne
authors: Guoqing
authors: G
authors: Zhang
authors: James N
authors: JN
authors: Demas
authors: Cassandra L
authors: CL
authors: Fraser
authors: Ben A
authors: BA
authors: Degraff