TITLE

Fourier transform emission spectroscopy of HfH and HfD

AUTHOR(S)
Ram, R. S.; Bernath, P. F.
PUB. DATE
July 1994
SOURCE
Journal of Chemical Physics;7/1/1994, Vol. 101 Issue 1, p74
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The electronic emission spectra of HfH and HfD were investigated in the 476 nm to 1 μm spectral region using a Fourier transform spectrometer. The bands were excited in a hafnium hollow cathode lamp in the presence of a mixture of neon and H2 or D2. For HfH, two ΔΩ=0 electronic transitions with a common Ω‘=3/2 lower state, most probably the X 2Δ3/2 ground state, were identified at 14 495 and 19 147 cm-1. These bands have been assigned as the [14.5]3/2-X 2Δ3/2 and the [19.1]3/2-X 2Δ3/2 transitions. The rotational analysis of the 0–0 and 1–1 bands of the [14.5]3/2-X 2Δ3/2 system and the 0–0 band of the [19.1]3/2-X 2Δ3/2 system provides the following equilibrium constants for the ground state of HfH: Be‘ = 5.019 11(8) cm-1, αe‘= 0.120 26(11) cm-1, and re‘ = 1.830 691(15) Å. For HfD, only the 0–0 band of the [19.1]3/2-X 2Δ3/2 transition at 19 134 cm-1 was identified. This work represents the first observation of the HfH and the HfD molecules.
ACCESSION #
7616567

 

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