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.
|Pages (from-to)||439 - 447|
|Number of pages||9|
|Journal||Journal of Quantitative Spectroscopy and Radiative Transfer|
|Publication status||Published - 1993|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
Baldacchini, G., Chakraborti, P. K., & D'Amato, F. (1993). Lineshape in a laval molecular beam and pressure broadening of N. Journal of Quantitative Spectroscopy and Radiative Transfer, 49(4), 439 - 447. https://doi.org/10.1016/0022-4073(93)90109-U