Diode laser spectroscopy of ammonia at 760 nm
Authors: Lucchesini A., Gozzini S.
Autors Affiliation: Istituto per i Processi Chimico-Fisici (IPCF) – CNR
Abstract: A tunable diode laser spectrometer has been employed to examine the unknown overtone absorption lines of NH(3) around 13, 100 cm(-1) (760 nm). The spectrometer sources are commercially available heterostructure AlGaAs tunable diode lasers operating in the \”free-running\” mode. The detection of the lines has been possible by the use of the wavelength modulation spectroscopy and the second harmonic detection technique. A special algorithm has been used in order to fit the highly modulated absorption lines. The weakest observed resonances have absorption cross sections on the order of similar or equal to 1 X 10(-25) cm(2)/molecule or similar or equal to 0.3 km(-1)/amagat. For some of the more intense lines self-, air-, N(2)-. He- and H(2)-broadening coefficients have been obtained at room temperature and also some shifting coefficients have been measured. (c) 2009 Elsevier B.V. All rights reserved.
Journal/Review: OPTICS COMMUNICATIONS (PRINT)
Volume: 282 (17) Pages from: 3493 to: 3498
KeyWords: Molecular spectroscopy; Ammonia; Line broadening and shift; Overtone bands; Tunable diode laserDOI: 10.1016/j.optcom.2009.05.049Citations: 5data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-05-31References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here