Bujarrabal, V.Gonzalo Fonrodona, IsabelSalinas, F.2023-06-212023-06-211984-10-010004-637X10.1086/162507https://hdl.handle.net/20.500.14352/64973© 1984 The American Astronomical SocietyAlong with the very frequent occurrence of every CH 9 cm line inversion, CH radio observations also show the existence of antother almost universal characteristic of thes lines’s excitation: the overexcitation of the satellite F = 0→ 1 line. Attempts to explain this fact, by means of quite a wide sample of local and nonlocal models as presented here, failed when line overlap was not taken into account. As will be shown, the overlap of two components (F=2^+ → 1^- and F=1^+→1^-) of the ^2π_1/2 J=3/2→J=1/2 rotational transition leads to the above-mentioned satellite-line anomalies. The numerical results are in reasonable agreement with the observations, and the mechanism satisfies the requirement of universality.engjournal articlehttp://dx.doi.org/10.1086/162507http://iopscience.iop.org/open access535AstronomyAstrophysicsÓptica (Física)2209.19 Óptica Física