Parameters of pulsed supersonic jets of SF6 and NH3 molecules studied with the use of a spectrometer based on tunable diode lasers

摘要

tative description of cooling molecules in a pulsed supersonic jet is given on the basis of literature data. Procedure of measurements is described and known relations are presented which allow one to determine the rotational temperature and concentrations of molecules in a jet using the measured intensities of IR absorption lines. The parameters of SF$-6$/ and NH$-3$/ jets have been determined for various pulsed valves by means of tunable diode lasers.