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Applied Physics B

, Volume 47, Issue 4, pp 343–348 | Cite as

Quantitative analysis of photoacoustic IR spectra

  • J. Brunn
  • P. Grosse
  • R. Wynands
Contributed Papers

Abstract

Photoacoustic spectroscopy is a method for directly measuring the absorption properties of gases and condensed matter. We have developed a photoacoustic gas cell for a rapid-scan Fourier spectrometer. With this cell we can extend the spectral range down to 180 cm−1; more than one octave lower than previously reported useful broadband measurements. The photoacoustic spectrum of a microscope cover glass was measured from 180 ... 200 cm−1 and normalized with respect to the spectrum of carbon black as a reference material. Starting from the one-dimensional equation of heat conduction we derived an expression for the surface temperature of single and double-layer samples. We calculated the surface temperature of the glass lamella and divided it by the corresponding values for carbon black using the thermal conductivity of carbon black as a fitting parameter. We show that the one-dimensional model calculation reproduces the experimental spectrum over the whole spectral range.

PACS

07.65 07.65G 78.30 

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Copyright information

© Springer-Verlag 1988

Authors and Affiliations

  • J. Brunn
    • 1
  • P. Grosse
    • 1
  • R. Wynands
    • 1
  1. 1.I. Physikalisches Institut der Rheinisch-Westfälischen Technischen HochschuleAachenFed. Rep. Germany

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