Millimetre-wave spectrum of the Ar-CO complex: the K=2 1 and 3 2 subbands

Autor:	By M. HEPP, R. GENDRIESCH, I. PAK, Y. A. KURITSYN, F. LEWEN, M. BROOKES, A. R. W. MCKELLAR, J. K. G. WATSON G. WINNEWISSER and AMANO, J. K. G. WATSON, G. WINNEWISSER, T. AMANO
Rok vydání:	1997
Předmět:	Chemistry Infrared media_common.quotation_subject Biophysics Radiation Condensed Matter Physics Asymmetry symbols.namesake symbols Millimeter Supersonic speed Physical and Theoretical Chemistry Atomic physics Hamiltonian (quantum mechanics) Molecular Biology Microwave Millimetre wave media_common
Zdroj:	Molecular Physics. 92:229-236
ISSN:	1362-3028 0026-8976
Popis:	The K a = 2←1 and 3←2 subbands of the pure rotational spectrum of the weakly bound van a der Waals complex Ar–CO have been studied by direct absorption of millimetre and submillimetre radiation in a supersonic jet. A total of 77 transitions were observed in the 138–265 GHz (2←1 band) and 308–361 GHz (3←2 band) regions. These transitions were incorporated in a global fit of existing infrared, microwave and millimetre-wave data in order to determine a refined set of molecular parameters for Ar-CO. It was found that the form of the simple Hamiltonian used for this fit had to be modified, so that the rotational dependence of the K-type splitting terms was given by (J + K)!/(J - K)!,in order to fit accurately the asymmetry doubling of the K a = 3 levels for lower J values. The theory of the splitting terms is explained a in some detail. The present results provide a more precise foundation on which to base the continuing study of the fundamental complex Ar–CO.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e164e8a733898e70779f3a9eb1c02487 https://doi.org/10.1080/002689797170428 Zobrazit plný text záznamu