Stimulated Raman Spectroscopy of 13CF4

Abstract CF 4 is a powerful greenhouse gas, mostly released in the atmosphere by industries. A careful modeling of its absorption spectrum is required in order to allow accurate atmospheric concentration measurements. For this aim, high resolution Raman spectroscopy is of great help, since it gives access to rovibrational levels that are not directly reachable through dipolar absorption, although they are involved in hot band generation. Following our previous work on 12 CF 4 , we present here a similar investigation of the second isotopologue, 13 CF 4 . The spectra of the ν 1 (909.21 cm −1 ), 2 ν 1 - ν 1 (906.77 cm −1 ), ν 1 + ν 2 - ν 2 (909.33 cm −1 ), ν 2 (435.47 cm −1 ), 2 ν 2 (868.10 cm −1 ) and 3 ν 2 - ν 2 (865.73 cm −1 ) bands were obtained with a quasi-continuous wave stimulated Raman spectrometer. These six bands were studied at temperatures of 140 and 298 K (for the hot bands). These spectra could be assigned and modeled thanks to the XTDS and SPVIEW software developed in the Dijon group.