Temperature dependence of the Raman spectra of liquid parahydrogen.
Vibrational and rotational spectra of liquid para-H(2) at temperature T=14-26 K and of solid at T=6-13 K have been obtained using coherent anti-Stokes Raman scattering technique. The vibrational frequency in the liquid increases with temperature by about 2 cm(-1) and the shift scales with the square of the sample's density. An extrapolation of the vibrational frequency in the metastable para-H(2) liquid below the freezing point is discussed. The results indicate that the vibron hopping between the molecules is active in the liquid, similar to that previously found in the solid.
Sliter
Russell
R
Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA.
Vilesov
Andrey F
AF