Hyperfine level dependence of pressure broadening in molecular spectra
Anno: 2001
Autori: Belli S., Buffa G., Di Lieto A., Minguzzi P., Tarrini O., Tonelli M.
Affiliazione autori: Belli S., Buffa G., Di Lieto A., Minguzzi P., Tarrini O., Tonelli M., INFM and dipartimento di Fisica dell’università di Pisa
Abstract: The hyperfine dependence of collisional relaxation of molecular spectra is a not widely known effect which can be observed only under particularly favorable circumstances. While the absence of such an effect was observed for various molecules, a variation of the collisional broadening parameter with the hyperfine quantum number F was observed only for CH3I. All these results are explained in the frame of a theoretical model showing that a hyperfine F-dependence of the relaxation parameters is not due to the negligible influence of nuclear spin interaction on the collisional dynamics, but to the F-dependence of the matrix elements of the multipole of the absorber involved in the collisional relaxation of the line. A recent experimental investigation allows an accurate validation of the theoretical model.
Giornale/Rivista: JOURNAL OF MOLECULAR STRUCTURE
Volume: 563-564 Da Pagina: 231 A: 233
Parole chiavi: pressure broadening; hyperfine effects; DOI: 10.1016/S0022-2860(00)00807-3Citazioni: 4dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui