The mm-Wave Rotational Spectrum of CBrClF2(Halon BCF): Observation of a NewR-Type Band and Generalization of Conditions for Oblate-Type Band Formation

✍ Scribed by Z. Kisiel; E. Bialkowska-Jaworska; L. Pszczólkowski

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 394 KB
• Volume: 177
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1996.0138

✦ Synopsis

The rotational spectrum of the best known halon molecule, CBrClF 2 , was measured in the region 160-320 GHz. The data set was extended to JЉ Å 110 and the weak b Q and a R rotational transitions were also assigned and measured. Accurate spectroscopic constants are reported for the ground state in the four most abundant isotopic species of the molecule, and for the lowest vibrational satellite in the 79 Br 35 Cl and 81 Br 35 Cl isotopic species. Broadband rotational spectra showed an unusual diffuse R-type band characterized by quantum number changes DJ Å 01, DK 01 Å 2, and DK /1 Å 03 between successive lines down the band. It is shown that this band is a variant of the so-called type II bands, which will form under the most general oblate limit condition (A / B) Å (l/m)2C, where m and l are integers. Such bands are expected to be common in high-J rotational spectra and their key properties are given.