High-Resolution Infrared and Millimeter-Wave Study of D3SiF: The Ground and v3=1 States of the 29Si and 30Si Species, and the v3=v6=1 and v3=2 States of D328SiF

✍ Scribed by N.Ben Sari-Zizi; H. Najib; J. Demaison; L. Margulès; Z. Kisiel; M.Yu. Tretyakov; E.B. MKadmi; H. Bürger

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 212 KB
• Volume: 208
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.2001.8361

✦ Synopsis

The ν 3 band of D 3 SiF near 890 cm -1 recorded with a resolution of 2.4 × 10 -3 cm -1 has been explored for the 29 Si and 30 Si isotopic species. Moreover, the ν 3 + ν 6 -ν 6 and 2ν 3 -ν 3 bands for the main 28 Si isotopomer have been assigned. For this purpose the ν 3 + ν 6 and 2ν 3 bands at 1435.697 and 1769.531 cm -1 have been studied. Ground state parameters of the 29 Si and 30 Si species have been determined by merging newly measured MMW frequencies and ground state combination differences. In addition, v 3 = 1 excited state parameters for these species have been obtained. While for the 28 Si species the v 3 = v 6 = 1 state is locally perturbed by levels of the v 2 + v 5 = 2 polyad, the v 3 = 2 state appears to be unperturbed, its parameters being predictable from those of the v 3 = 1 state. Anharmonicity constants x 33 = -4.1334 cm -1 and x 36 = -3.6547 cm -1 have been determined.