Diode laser spectroscopy of methane overtone transitions
Anno: 1993
Autori: Lucchesini A., Longo I., Gabbanini C., Gozzini S., Moi L.
Affiliazione autori: Istituto di Fisica Atomica e Molecolare del Consiglio Nazionale delle Recerche, Universita di Siena, Via del Giardino, 7 I-56127, Italy; Dipartimento di Fisica, Universita di Siena, Banchi di Sotto, 55I-53100, Italy
Abstract: With the aid of commercial room-temperature AlGaAs diode lasers, frequency modulation absorption spectroscopy was performed on the 7900 angstrom and 8600 angstrom rovibrational combination overtone bands of methane. Three weak transitions are reported in the range around 8610 angstrom that, to our knowledge, have not yet been observed and measured. Self-broadening and pressure-broadening coefficients of one of these new absorption features (at 8608.93 angstrom) were derived from CH4 and for CH4 immersed in N2 and He buffer gases. An evaluation of the methane detection sensitivity is given for favorable laboratory conditions as well as for an open-path situation.
Giornale/Rivista: APPLIED OPTICS
Volume: 32 (27) Da Pagina: 5211 A: 5216
Parole chiavi: Diode laser spectroscopy; Environmental control; Overtone absorption spectroscopyDOI: 10.1364/AO.32.005211Citazioni: 26dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-21Riferimenti 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