Pressure shifts of acetonitrile ground state parameters

High resolution rotational spectrum of FCO2 radical (extension to lower frequencies)

“…1) with the recently developed Prague microwave spectrometer (see Ref. [13]). The same in situ method of production (low pressure pyrolysis of bis(fluoroformyl) peroxide) of the radical was used in this work.…”

The use of the Fabry–Perot interferometer for high resolution microwave spectroscopy

“…The resolved, partly resolved and unresolved hyperfine structures of the rotational transitions J 0 J 00 :3 2, K = 0, 1, 2 provide a broad scale of spectral lines from very intense to weak. Acetonitrile is a symmetric top molecule with a large dipole moment (l = 3.92 D) and its rotational spectra were studied in details in the Prague laboratory [2]. Fig.…”

“…Fig. 3 involves the comparisons of the acetonitrile spectra measured using the Fabry-Perot resonator as described above and the standard high resolution mw absorption setup with the 5.6 m long optical path with the acetonitrile pres- sure being roughly 15 lbar [2]. The cavity response width depends on the sample absorption and pressure.…”

“…The applications of the Fabry-Perot resonator for microwave Fourier transform spectroscopy measurement of molecular emissions after an excitation by an electromagnetic field pulse are also presented. All these interferometric measurements are compared with the analogous spectra measured with the Prague mm-wave high resolution spectrometer [2].…”

Rotational spectrum of 13C chloromethanes

“…In this short note we present rotational spectra of 13 CH 3 35 Cl and 13 CH 3 37 Cl measured in the frequency range between 50 and 275 GHz using the Prague semiconductor millimeter wave high resolution spectrometer (see [5]). The optical path length of a conventional glass 280 cm long cell was doubled using a roof top mirror and a polarization grid as described in [6,7].…”