Vibrational frequency shifts of fluid nitrogen fundamental and hot band transitions as a function of pressure and temperature |
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| Authors: | S C Schmidt D Schiferl A S Zinn D D Ragan D S Moore |
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| Institution: | 1. Los Alamos National Laboratory Los Alamos , New Mexico, 87545, USA;2. Department of Chemistry , University of California , Berkeley, CA, USA |
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| Abstract: | Abstract Coherent anti-Stokes Raman scattering (CARS) and spontaneous Raman spectroscopy have been used to obtain vibrational spectra of shock-compressed and static high-pressure fluid nitrogen, respectively. Vibrational frequencies were obtained from the CARS data using a semiclassical model for these spectra. Spontaneous Raman vibrational frequencies were determined by fitting data using a Lorentz shape line. A functional form was found for the dependence of the vibrational frequency on pressure and temperature to 40 GPa and 5000 K, respectively. The result is compared to a recent theoretical model. |
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| Keywords: | CARS diamond cell nitrogen pressure standard Raman spectra shock compression |
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