Pressure Self-shift of the J = 1 ← 0 Line of Carbon Monoxide

Pure rotational R(0) and R(1) lines of CO in Ar baths: experimental broadening, shifting and mixing parameters in a wide pressure range versus ab initio calculations

“…22 Pressure broadening, shifting and ''wind effect'' (speed-dependence of collisional relaxation) of pure rotational lines were extensively studied. [23][24][25][26][27] The effect of collisional coupling leading to mixing of CO lines was investigated for the fundamental rovibrational 28 and the first overtone bands. 29 To the best of our knowledge, the shape of rotational lines of the CO spectrum was not investigated at elevated (close to atmospheric and above) pressures, except for the previous work 30 dedicated to the R(0) line, hereafter referred to as Paper I, and to which some of us have contributed.…”

CO-Ar collisions: ab initio model matches experimental spectra at a sub percent level over a wide pressure range

“…Line positions are known with sub-kHz accuracy from Lamb-dip measurements [17]. Pressure broadening, shifting and "wind effect" (speed dependence of collisional relaxation) of the spectrum were extensively studied [18][19][20][21][22][23]. The collisional coupling effect of CO lines perturbed by either Ar or He was explored only for the fundamental rovibrational band [24][25][26][27], the first [24,28] and the second [29] overtone band.…”

Broadening and shifting studies of J=5←4 carbon monoxide line perturbed by Ne, Ar, and Kr

“…This paper continues our previous lineshift and line broadening studies of carbon monoxide molecule induced by collision with different types of gases [4][5][6][7]. Since carbon monoxide (CO) is a simple diatomic molecule, the choice of the rare gases (Ne, Ar, and Kr) was motivated by the development of theories describing collisional line broadening and shifting phenomena, the experimental data are useful for deducing intermolecular potential parameters.…”