Lineshape in a laval molecular beam and pressure broadening of N2O Transition lines
Authors: Baldacchini G., Chakraborti P.K., D’Amato F.
Autors Affiliation: Bhabha Atom. Res. Ctr., MDRS, Bombay 400085,India; CRE Frascati,ENEA, dipartimento sviluppo tecnol. punta, area INN, CP 65,I-00044 Frascati, Italy
Abstract: We have measured the absorption profile of N2O transitions belonging to the nu2 vibrational band at 589 cm-1 in order to characterize the gas flow in a pulsed Laval molecular beam. It is found that the shape of the transition is almost Lorentzian near the nozzle exit while it clearly approaches a Gaussian profile far away from the nozzle throat. After measuring the spectral profiles for the same transition in a cell at different pressures, we were able to quantify the molecular density along the Laval stream. We have also measured the pressure-broadening parameters of few transitions of the nu2 band.
Journal/Review: JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
Volume: 49 (4) Pages from: 439 to: 447
KeyWords: Laval molecular beam; Pressure broadening; N2ODOI: 10.1016/0022-4073(93)90109-UCitations: 1data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-08-01References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here