Spectroscopic studies of 13CO2 trapped in rare gas matrices

✍ Scribed by A.-M Vasserot; B Gauthier-Roy; H Chabbi; L Abouaf-Marguin

• Book ID: 104151833
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 496 KB
• Volume: 220
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1016/s0022-2852(03)00126-7

✦ Synopsis

Low temperature (5 K) high resolution (0.15 and 0.03 cm À1 ) absorption spectra of 13 CO 2 have been recorded in neon, argon, krypton, and xenon matrices, in the m 3 and m 2 regions. Diffusion experiments have been performed in krypton and xenon in order to identify vibrational traps which could be responsible for the decrease and shortening of the emission observed after laser excitation: high-frequency structures in the m 3 region are assigned to dimers and a doubling of the monomer line is due to a site effect. In neon, only a double substitutional site, with a splitting of the degenerate m 2 vibration, is observed. In argon, as previously reported, a single and a double site are characterized. In krypton and xenon, where m 2 is not split, only single sites would be predicted. As one of them exhibits a m 3 line highly sensitive to temperature, we expect a large coupling with the lattice and a fast vibrational relaxation. This site is very likely the vibrational trap we are looking for.