High resolution emission Fourier transform infrared spectra of the 4p-5s and 5p-6s bands of ArH.

In the 2500-8500 cm(-1) region several strong emission bands of (40)ArH were observed by Fourier transform spectroscopy through a dc glow discharge in a mixture of argon and hydrogen. Rotational-electronic transitions of the two previously unstudied 4p-5s and 5p-6s,v = 0-0, bands of (40)ArH were measured and assigned in the 6060 and 3770 cm(-1) regions, respectively. A simultaneous fit of the emission transitions of the 4p-5s and 5p-6s bands and an extended set of transitions of the 6s-4p band observed by Dabrowski, Tokaryk, and Watson [J.

High-Resolution Infrared Study of the nu(7), nu(8), and nu(15) Bands and Millimeter-Wave Investigation of the v(8) = 1 State of CF(2)Cl-CH(3).

High-resolution (Deltavarsigma = 2.3 and 2.9 x 10(-3) cm(-1)) FTIR spectra of natural and (35)Cl monoisotopic CH(3)CF(2)Cl have been recorded at -70 degrees C in the 600-1400 cm(-1) range.

Millimeter-Wave Spectrum of CF(2)Cl(2), Taking into Account the Hyperfine Structure.

A new investigation of the CF(2)(35)Cl(2) ground state rotational spectrum in the 50-100 GHz frequency range gave an opportunity to improve the accuracy of rotational and quartic distortion parameters by an order of magnitude and to determine values of six sextic centrifugal distortion parameters. A special technique was used to process line profiles of unresolved or partially resolved hyperfine structures of rotational transitions. It allowed us to improve significantly values for the diagonal parameters of quadrupole coupling chi(aa), (chi(bb)-chi(cc)) and to determine the off-diagonal parameter chi(ab).

The Coriolis-Coupled States v(6) = 1 and v(8) = 1 of DCOOH.

The Fourier transform gas-phase infrared spectra of the Coriolis-perturbed nu(6) and nu(8) bands of deuterated formic acid DCOOH were measured with a resolution of ca. 0.003 cm(-1).

The Coriolis-Coupled States v7 = 1 and v9 = 1 of trans-HCOOD and trans-DCOOD.

The Fourier transform gas-phase infrared spectra of the two lowest Coriolis-perturbed nu7 and nu9 bands of deuterated formic acid HCOOD and DCOOD have been measured with a resolution of ca. 0.003 cm-1.

Microwave Spectroscopy of the Ground, nu18, 2nu18, and nu11 Vibrational States of CF3CFH2.

The rotational spectra of the ground, nu18, 2nu18, and nu11 vibrational states of CF3CFH2 have been investigated in the frequency range 48-116 GHz with an accuracy of measurement better than 10 kHz. Rotational and centrifugal distortion parameters derived using an S-reduced Watson-type Hamiltonian have been improved for the ground and nu18 states. An interaction between 2nu18 and nu11 vibrational states has been detected, and rotational, centrifugal distortion, and coupling parameters of these states have been determined for the first time.

Rotational Spectrum of the Excited Vibrational States of DCOOH and Assignment of Optically Pumped Laser Transitions.

The rotational spectrum of DCOOH in the 175-335 GHz region was investigated. Analysis of the spectrum made it possible to assign several dozen transitions in the nu6, nu8, and nu5 vibrational states and to determine the rotational and centrifugal distortion constants. The derived parameters of the nu6 state allowed four optically pumped laser transitions to be assigned.