Narrowing of the vibrational spectrum under compression of liquid carbon dioxide |
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Authors: | V G Arakcheev and V B Morozov |
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Institution: | 1.International Laser Center and Faculty of Physics,Moscow State University,Moscow,Russia |
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Abstract: | The broadening and shift of the Q bands of the 1388/1285-cm−1 Fermi doublet of carbon dioxide have been measured by means of the spectroscopy of coherent anti-Stokes Raman scattering
in a wide density range realized at compression in dense gaseous and liquid states. The spectrum of the low-frequency Q band exhibits an essential narrowing upon the compression of the liquid in the density range of 320–400 amagat from a maximum
width of about 2.2 cm−1 to about 1.7 cm−1 determined by elastic dephasing. The observed dependence is connected with the progressive narrowing of the spectral contribution
attributed to the collapsed rotational structure. |
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