A study of collision broadening in the O2 A-band with the noble gases using fourier transform spectroscopy

Spectroscopic lineshape study of the self-perturbed oxygen A-band

“…The EPGL [17] gives the collisional transfer rate, k j j 0 , from a rotational state j 0 to a higher rotational state j as…”

“…In the past two decades there have been numerous studies focused upon the oxygen A-band [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Ritter and Wilkerson [5] measured the absorption profiles of 54 transitions within the O 2 A-band using tuneable dye laser spectroscopy and afterwards compared the adequacy of the fits of the measured spectral lines given by Voigt, Galatry, Rautian and Sobelman, and Berman lineshape profiles.…”

“…Pope et al [17] reported broadening coefficients obtained from a Voigt profile for noble gas perturbers (He, Ne, Ar, Kr, Xe) of A-band transitions with J 00 up to 21. The authors modeled the broadening results using two rotational energy transfer scaling laws: EPGL-0 and ECS-P. Leeuwen et al [18] reported line positions, intensities, and Lorentzian linewidths for 12 P-branch transitions with J 00 values ranging from 34 to 45 using noise-immune cavity-enhanced optical heterodyne molecular spectroscopy (NICE-OHMS).…”

A theoretical and experimental study of pressure broadening of the oxygen A-band by helium

“…Here p be determined by the spectrometer used by [52]. It should be noted that the present theory does not exactly satisfy detailed balance.…”

“…These coefficients represent the linear dependence of the line widths and shifts on the, in this case, helium density. The broadening coefficients have been determined experimentally, and are reported in the literature [52]. The line shift coefficients, however, were too small to determine accurately.…”