INTENSITY MEASUREMENTS OF SOME FUNDAMENTAL ABSORPTION BANDS OF LIQUID H2O, D2O, AND CS2.
NAVAL RESEARCH LAB WASHINGTON D C
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Techniques for fabricating and calibrating liquid absorption cells having path lengths of about 1 micron were developed. The thin spacers required for such cells were formed by the vacuum deposition of aluminum directly onto the cell windows. The path lengths of the assembled cells were determined by the well known interference fringe method. However, in order to produce discernible fringes in the visible and near-ultraviolet spectral regions, it was necessary to polish the internal surfaces of the cell windows to a high degree of flatness. Using such cells, several very intense bands of H2O 3410 and 1645cm, D2O 2510cm, and CS2 1510cm were measured. The absorptivity values obtained for H2O and D2O appear to be significantly higher than those reported previously, while the integrated intensity of the NU-3 band of CS2 is somewhat less than that calculated from dispersion and reflectance data. Distortion of the cell by the liquid sample and photometric accuracy of the spectrometer are briefly discussed as possible sources of systematic error. Author
- Inorganic Chemistry
- Atomic and Molecular Physics and Spectroscopy