Collisional Broadening Coefficients in the ν4 Band of NH3 Perturbed by He and Ar

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

“…The parameters deduced from the fits for a line k are Pc k , r k , S k and PY k . Note that the linewidths c k and line intensities S k were already published in [5,7,20]. An example of a multi-pressure fit in the case of P P(4, 3) s line for NH 3 broadened by H 2 is given in Fig.…”

“…(6) and (7) of [5] and Eqs. (10) and (11) of [6] and for collision induced transitions with DK = 0 and DK = ±3.…”

“….) [4][5][6][7][8]. On the other hand, the line shifts and especially line mixing have received much less attention in the past, mainly because they are expected to be small and their observation is therefore difficult.…”

Line Broadening and Mixing in NH3 Inversion Doublets Perturbed by NH3, He, Ar, and H2

“…Calculations of broadening coefficients of NH 3 lines by He, Ar, and H 2 have been previously presented (16,34) and will not be repeated here.…”

“…The electric multipole moments and LJ parameters of NH 3 are given in Table 1, whereas rotational constants in the ground and ν 4 states are given in Table 2 of Ref. (34).…”