Pressure Broadening Measurements of J = 6 ⇒ 7 Rotational Line of the t-Butyl Cyanide Molecule

Abstract

Self-broadened width of J = 6 7 rotational line in the ground state of t-butyl cyanide molecule has been measured at room temperature. The measurements of the linewidth as a function of the gas pressure were carried out with home-made spectrometer at the frequency ν0 = 38 498.308 MHz. The mean value of the pressure-broadening coefficient c = 76.9 ± 0.6 MHz Τorr -1 was obtained.

Temperature Dependence of Pressure Broadened Linewidth of J = 1 ⇐ 0 Rotational Transition of CH3C14N Molecule Mixed with OCS and H2Molecule

“…The home made microwave spectrometer we used was described previously [25]. Since that time we have modified a few details of this instrument to improve the accuracies of the frequency calibration and the pressure of the studied gas.…”

Collisional Broadening of the J=7 ⇐ 6 Transition of t-Butyl Cyanide by CH3CN, OCS, CO2and Helium

“…The study was made at the pure pivalonitrile [6] and the pivalonitrile with four different admixtures. The gas pressure was measured with the absolute manometer to an accuracy ±1.0 millitorr.…”

“…The effects of the Doppler broadening, saturation, Stark modulation and the collisions of the gas molecules with the cavity walls were accounted for [6] in the determination of the linewidth. The least squares fit was used in the calculation of the pressure broadening coefficient.…”

“…These investigations yield many stuctural informations in the ground and lowest vibrationally excited states. Principal informations on the dynamical properties of the t-butyl cyanide come from pressure broadening measurements [6]. The aim of the present study is to give the qualitative informations on the intermolecular interactions which occur during molecular collisions in t-butyl cyanide gas phase.…”

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

“…( 1 0 The measurem ents of m i crow ave absorpti on were carri ed out wi th a custom m ade Stark spectro m eter (Fi g. 1) deta il ed previ ously [6,11], wi th a few m odi Ùca-ti ons whi ch i m pro ve the spectro scopi c pro p erti es. The m i crow ave power suppl i ed by a synthesi zer Anri tsu 68367C (SM G ) i s passed thro ug h the cali bra ted attenuato r (MA) and coupl ed to a conven ti onal H-ba nd wa veguide: two -meter l ong Sta rk absorpti on cell (SC), Ùll ed wi th the absorbi ng gas.…”