Combined interferometric and absorption-spectroscopic technique for determining molecular line strengths: Applications to CO2
Year: 2003
Authors: Castrillo A., Gagliardi G., Casa G., Gianfrani L.
Autors Affiliation: Dipartimento di Scienze Ambientali, Seconda Universitŕ di Napoli, INFM–Gruppo Coordinato Napoli 2, Via Vivaldi 43, Caserta, I-81100, Italy
Abstract: A diode-laser-based technique has been developed for absolute line strength measurements with high precision and accuracy, combining a spectroscopic determination of the integrated absorbance with an optical measurement of the absorption path length by means of a Michelson interferometer. This method has been applied to several (CO2)-C-12-O-16 vibrorotational transitions belonging to the nu(1)+2nu(2)(0)+nu(3) combination band, in the spectral region around 2 mum. The 1sigma overall accuracy in line strength determination ranges between 0.4% and 0.7%, while the experimental reproducibility is estimated to be around 0.1%. To our knowledge, these levels are the highest ever reached before. The pressure-broadening coefficients for the same transitions are also reported.
Journal/Review: PHYSICAL REVIEW A
Volume: 67 (6) Pages from: 062503 to: 062503
KeyWords: molecular absorption linestrength; laser spectroscopy; interferometerDOI: 10.1103/PhysRevA.67.062503Citations: 20data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-03References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here