Pressure Broadening of J=1 ← 0 Rotational Line of Fluoroform Caused by Spherical Perturbers

Gierszal, S.; Galica, J.; Miś-Kuźmińska, E.; Liber, Arkadiusz

doi:10.12693/aphyspola.101.805

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2003

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“…The measurements of microwave absorption were carried out with a custom made Stark spectrometer (Fig. 1) detailed previously in [16,17], with a few modifications that improve the spectroscopic properties. The microwave power supplied by a synthesiser Anritsu 68367C (SMG) is passed through the calibrated attenuator (MA) and coupled to a conventional H-band waveguide: two meter long Stark absorption cell (SC), filled with the absorbing gas.…”

Section: Methodsmentioning

confidence: 99%

Determination of Molecular Quadrupole Moment of Boron Trichloride by Microwave Spectroscopy

Gierszal¹,

Galica²,

Miś-Kuźmińska³

2003

Phys. Scr.

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The foreign-gas broadening parameter for fluoroform molecules interacting with nonpolar BCl3 molecule as perturber has been measured and the collision cross section has been determined. The results are pressure broadening coefficient Cw = (43 ± 1) [kHz/Pa] for J = 1 ← 0 rotational transition of CHF3 molecule in mixture with BCl3 gas, and collision cross section σexp = 294.0 [Å2]. Experimental linewidth parameter is interpreted using Anderson–Tsao–Curnutte as well as Murphy–Boggs theories for the mixed- interaction case. From this analysis a value of molecular quadrupole moment Q = (4.1 ± 0.2) [DÅ2] of boron trichloride molecule has been obtained.

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Section: Methodsmentioning

confidence: 99%