# HEAT PULSE MODULATION OF MOLECULAR CRYSTAL LUMINESCENCE AT LIQUID HELIUM TEMPERATURES

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 dc.creator Hunter, S. J. en_US dc.creator Parker, H. en_US dc.creator Francis, A. H. en_US dc.date.accessioned 2006-06-15T17:14:34Z dc.date.available 2006-06-15T17:14:34Z dc.date.issued 1974 en_US dc.identifier 1974-Sigma-9 en_US dc.identifier.uri http://hdl.handle.net/1811/16420 dc.description Author Institution: Department of Chemistry, University of Illinois at Chicago Circle en_US dc.description.abstract The modulation of low temperature ($2^{\circ} K$) molecular crystal fluorescence and phosphorescence by sub-microsecond duration heat pulses is discussed in connection with the study of rates of triplet energy transfer and trap thermalization. A discussion of the dynamics of heat pulse propagation in molecular solids is presented and estimates of the thermal relaxation time of the lattice obtained. It is suggested that these times are sufficiently short to permit investigation of the dynamics of exciton energy transport in molecular crystals by means of low temperature T-jump experiments. The details of the technique are discussed and results from several experiments presented. Additionally, heat pulse modulation of the electron paramagnetic spin distribution of radiative triplet states is discussed and some preliminary results presented. en_US dc.format.extent 167075 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title HEAT PULSE MODULATION OF MOLECULAR CRYSTAL LUMINESCENCE AT LIQUID HELIUM TEMPERATURES en_US dc.type article en_US