next previous
Up: Identification of FeH

2. Molecular data

Seven infra-red bands of the tex2html_wrap_inline1491-tex2html_wrap_inline1491 system of the FeH molecule were analyzed by Phillips et al. (1987) (The rms of the deviations between observed and calculated lines was tex2html_wrap_inline1541). 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 tex2html_wrap_inline1543-type doubling. The lower energy level in a tex2html_wrap_inline1543 doubled pair is described as an a-level and the higher as a b-level. The main branches of the bands due to tex2html_wrap_inline1551, tex2html_wrap_inline1553, tex2html_wrap_inline1555 and tex2html_wrap_inline1557 have been studied in the present analysis.

 

Band Wavenumber Range ( tex2html_wrap_inline1565) 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
Table 1: I.R. bands of the tex2html_wrap_inline1491-tex2html_wrap_inline1491 system of the FeH molecule

* Calculated.


next previous
Up: Identification of FeH

Copyright by the European Southern Observatory (ESO)