Broadening and Shift of the Lines of Molecular Ions by Collisions with Neutral Perturbers
Anno: 1994
Autori: Buffa G., Tarrini O., Cazzoli G., Dore L.
Affiliazione autori: Dipartimento di fisica dell’università di Pisa
Dipartimento di Chimica dell’università di Bologna
Abstract: We present a theoretical model for studying the shape of the rotational lines of molecular ions perturbed by collisions with neutral species. This model shows that the interaction between the ionic monopole and the multipole moments of the perturber has no role in the collisional relaxation of the lines. The effect of the ionic monopole is restricted to that of inducing a polarization of the neutral perturbers that can cause relaxation by interaction with the other permanent moments of the absorbing ion. We also present, for HCO+ perturbed by argon, an experimental study of the pressure broadening and shift of the rotational lines J = 1 <-- 0, 2 <-- 1, and 4 <-- 3. The agreement between theory and experiment is satisfactory. Giornale/Rivista: PHYSICAL REVIEW A
Volume: 49 Da Pagina: 3557 A: 3565
Parole chiavi: pressure broadening; pressure shift; ionsDOI: 10.1103/PhysRevA.49.3557Citazioni: 25dati 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