Lineshape in a laval molecular beam and pressure broadening of N

G. Baldacchini, P.K. Chakraborti, F. D'Amato

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Abstract

We have measured the absorption profile of N2O transitions belonging to the v2vibrational band at 589 cm-1in 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 v2band. © 1993.
Original languageEnglish
Pages (from-to)439 - 447
Number of pages9
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume49
Issue number4
DOIs
Publication statusPublished - 1993
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

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