Line shift and mixing in the ν4 and 2ν2 band of NH3 perturbed by H2 and Ar

Shifting and line mixing parameters in the ν4 band of NH3 perturbed by CO2 and He: Experimental results and theoretical calculations

“…Measurements of line shifts have been published for different bands and collision partners (see Ref. [2] and the articles quoted therein). When collisional broadening of spectra lines is such that they begin to overlap, the rotational energy transfers mix the transition intensities, transferring intensity between components, vastly altering the line shapes.…”

Pressure-induced line mixing in the ν4 band of NH3 perturbed by O2 and self-perturbed

“…For Ammonia, several studies have been focused on line-mixing effects at low pressures [11][12][13][14][15][16][17][18][19][20].…”

Line shifts in the ν2, 2ν2, and ν4 bands of NH3 perturbed by O2

“…We have recently reported results of experimental and theoretical investigations of the line shifts and line mixings in the m 4 and 2m 2 bands of ammonia perturbed by Ar, He, H 2 , N 2 , and CO 2 [16][17][18]. and Q branches of these bands with J quantum number values ranging from 1 to 13.…”