Abstract

Energy decay rate of the first vibrational excited state for solid parahydrogen is measured from 4.8 K to 12 K. Measurements are carried out using the transient optothermal lensing spectroscopy with the vibrational excitations via the stimulated Raman scattering. The decay rate is measured to be 2.3×104 s−1 at 4.8 K, and it increases to 6.1×104 s−1 by raising the temperature to 12 K.

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