“…It has since been well established that a meaningful study of Dicke narrowing in CO-Ar, HF-Ar, and similar systems must account for speed dependence (see for example, [4,38,42,43,49,51,52]), and we therefore limit our discussion to speed-dependent analyses. To the best of our knowledge, [1][2][3][4][5][6][7]16,31,33,[36][37][38][39][40][41][42][43]49,[51][52][53][54][55][56][57][58][59][60][61][62] are the only studies that use a speed-dependent, Dicke-narrowed line shape model to analyze experimental data.…”