Decay time thermometers

V. Fernicola and L. Crovini, Two fluorescent decay-time thermometers, in 7th Int. Symp. Temp., Toronto, Canada, April 30, 1992, American Institute of Physics, Washington, D.C., 1992. 

TABLE 16.16 Phosphor Properties of the Decay-Time Thermometers [64]... 

V. Pemicola and L. Crovine, Two Fluorescent Decay-Time Thermometers, in Temperature Its Measurement and Control in Science and Industry, vol. 6, pt. 2, pp. 725-730, American Institute of Physics, New York, 1992. 

Certain salts of rare earths exhibit sharp fluorescence lines when excited by UV light. It has been shown that the relative strengths of different lines and also the decay time of the fluorescence at a certain fluorescence wavelength vary strongly with temperature [10.95]. Fibre thermometers with a rare-earth-salt fibre tip have been developed. By applying thin layers of such salts to surfaces it is possible to remotely measure the temperature by LIF. This technique could be particularly valable for hot rotating machine parts. 

---