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Investigation of the water-vapor continuum in the THz region using a multipass cell

✍ Scribed by V.B. Podobedov; D.F. Plusquellic; G.T. Fraser

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
325 KB
Volume
91
Category
Article
ISSN
0022-4073

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✦ Synopsis

Laboratory absorption measurements of the water-vapor continuum in the far infrared region from 12 to 55 cm Γ€1 (0.4 -1.83 THz) were obtained using a multipass absorption cell, a Fourier transform spectrometer and a liquid-He-cooled bolometer detector. Measurements were made at a temperature, T ΒΌ 297 K with water vapor and nitrogen pressures up to 2.2 and 81 kPa, respectively. The effects of the choice of lineshape function and far-wing cut-off factors on the reported continuum absorption are analyzed by modeling the resonant water-vapor spectrum using van Vleck-Weisskopf and Lorentzian lineshapes. Comparisons with available microwave data and model calculations are also presented.

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