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2012 BFY Abstract Detail Page
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||W12 - Temperature Dependent Lifetime Measurements of Fluorescence from a Phosphor
||This laboratory activity exploits the very efficient fluorescence of atoms that are constituents of solid state phosphor materials. Learning and working with fluorescence the student learns concepts and experimental techniques not just applicable to atomic physics but to a wide range of disciplines including chemistry and the life sciences. The objectives of this experiment are: (1) to study and investigate the principles of atomic lifetimes, (2) to learn experimental techniques for measuring lifetimes, (3) to study and investigate the energy pathways in a solid that fluoresces when excited, (4) to measure and analyze the temperature dependence of fluorescent light lifetimes (of a particular wavelength) emitted from a phosphor material excited with a nitrogen laser, LED, or other energy source, (5) to learn computer-based data acquisition and analysis procedures for measuring temperature dependent lifetimes, and (6) to learn a practical application for this technique. The basic apparatus can easily be adapted to incorporate other more advanced subjects such as signal processing, signal-to-noise investigations, and optics-based sensing.
1. Department of Physics and Astronomy, 401 Nielsen Physics Building, The University of Tennessee, Knoxville, Tennessee 37996-1200.
2. Sensors and Controls Research Group, Measurement Science and Systems Engineering Division, Oak Ridge National Laboratory, Oak Ridge, TN. 37831-6056.
3. Emerging Measurements Company, 9910 Kay Meg Way, Knoxville, TN. 37922.
University of Tennessee