Seven infra-red bands of the -
system of the
FeH molecule were analyzed by
Phillips et al. (1987)
(The rms of the deviations between observed and calculated lines was
). Their wavenumber ranges are listed
in Table 1 in order of the wavelength of the heads. The wavelengths and
wavenumbers for two additional bands were calculated. Four pairs of
R-branches and four pairs of P-branches imply that the infrared system
is produced by transitions
between two quartet states with
-type doubling. The lower
energy level in a
doubled pair is described as
an a-level and the higher as a b-level. The main branches of the bands
due to
,
,
and
have been studied in the present analysis.
Band | Wavenumber Range ( ![]() | Head Wavelength (Å) | ||
(2-0) | 12045 - 12846 | 7786 | ||
(1-0) | 10343 - 11500 | 8692 | ||
(2-1) | 10324 - 11089 | 9020 | ||
(0-0) | 8990 - 10102 | 9896 | ||
(1-1) | 9191 - 9750 | 10253 | ||
(2-2)* | 8750 - 9403 | 10639 | ||
(0-1) | 7563 - 8373 | 11939 | ||
(1-2) | 7450 - 8069 | 12389 | ||
(0-2)* | 6118 - 6697 | 14927 |