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Opto-thermal study of the melting transition of benzophenone

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Abstract

We report a series of opto-thermal transient emission radiometry (OTTER) measurements on benzophenone over the temperature range 20–80°C, which includes the melting transition at 48°C. At temperatures sufficiently close, but below the melting point, the form of the opto-thermal decay curves was found to change, when the laser pulse energy was sufficient to cause transient melting near the surface. Such measurements could be useful in the study of re-crystallation dynamics in pulsed laser annealing and similar surface treatments. In addition, the experiment gives a direct measure of Δθ0, the initial jump in surface temperature, and a comparison of solid and liquid thermal diffusivities. The values found in the present study are Δθ0, andD(solid)/D(liquid)=2.2±0.2.

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Author notes

  1. J. R. Gilchrist

    Present address: Edinburgh Instruments Ltd, Research Park, Riccarton, Currie, EH14 4AP, Edinburgh, UK

Authors and Affiliations

  1. Photophysics Research, Strathclyde University, G4 ONG, Glasgow, UK

    R. E. Imhof, F. R. Thornley, J. R. Gilchrist & D. J. S. Birch

Authors
  1. R. E. Imhof
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  2. F. R. Thornley
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  3. J. R. Gilchrist
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  4. D. J. S. Birch
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Imhof, R.E., Thornley, F.R., Gilchrist, J.R. et al. Opto-thermal study of the melting transition of benzophenone. Appl. Phys. B 43, 23–28 (1987). https://doi.org/10.1007/BF00693968

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  • DOI: https://doi.org/10.1007/BF00693968

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