“…2). Due to the fact that most of the lines are weak, the relative accuracy is estimated higher wavenumbers other types of accidental resonances appear, as observed, for example, in previous studies (13, as 7 1 n 3 in the 5240-5330 cm 01 region, as shown in Fig. 1, and range of rotational quantum numbers J and K a as that for the band n 1 / 2n 2 / 3n 3 ( Table 2).…”