THE VIBRATIONAL-STATE (10-DEGREES-0) OF AR...HCL EXCITED IN A PULSED JET BY A GLOW-DISCHARGE - ROTATIONAL SPECTRUM AND LIFETIME

Pure rotational spectra in the vibrationally excited state (10(0)0) of three isotopomers of the van der Waals molecule Ar...HCI have been detected with a pulsed nozzle, Fourier-transform microwave spectrometer that uses a dc glow discharge to excite molecules emerging from the nozzle. The spectroscopic constants B1, D1 and chi1 (C1) associated with the (10(0)0) state are reported. A comparison of linewidths for the states (10(0)0) and (00(0)0) and time-of-flight arguments allow the conclusion that the lifetime for vibrational predissociation from the state (10(0)0) iS tau greater than or similar to 300 mus.