Sergey P. Belov

Testing the morphed potential of Ar:HBr using frequency and phase stabilized FASSST with a supersonic jet

Abstract The lowest frequency Σ bending vibration of Ar:HBr has been recorded using frequency and phase stabilized Fast Scan Submillimeter Spectroscopic Technique (FASSST) coaxially with a supersonic jet. The fitted band origin was ν 0 =329611.4482(16) MHz, the excited stated rotational constant was B =1236.41359(22) MHz, the distortion constants were D J =0.0124740(36) MHz and H J =−2.503(17)×10 −6 MHz and the quadrupole constants were χ aa =260.9552(79) MHz and D χ =−0.03174(35) MHz for Ar: H 79 Br . Corresponding values have also been determined for the Ar: H 81 Br isotopomer. χ aa and D χ are compared with values predicted from a recently determined morphed potential of Ar:HBr.

Co-axially configured supersonic jet spectrometer for submillimeter investigations of non-covalent interactions

The current status in the development of a phase and frequency stabilized co-axially configured submillimeter supersonic jet spectrometer will be described. The performance characteristics of the spectrometer will be illustrated by investigations of non-covalent interactions including van der Waals and hydrogen bonded complexes.