TITLE

Rotationally resolved spectroscopy of jet-cooled NbMo

AUTHOR(S)
Nagarajan, Ramya; Morse, Michael D.
PUB. DATE
October 2007
SOURCE
Journal of Chemical Physics;10/28/2007, Vol. 127 Issue 16, p164305
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Rotationally resolved resonant two-photon ionization spectra of jet-cooled NbMo are reported for the first time. A vibronic spectrum of NbMo was recorded in the 17 300–22 300 cm-1 spectral region. Although the observed bands could not be grouped into electronic band systems, four excited vibronic levels with Ω=2.5 and two excited levels with Ω=3.5 were identified. The ground state of NbMo has been assigned as 2Δ5/2, deriving from a 1σ21π41δ32σ2 configuration of the valence electrons. Rotational analysis of six bands provides a ground state rotational constant of B0″=0.087 697(26) cm-1, corresponding to a bond length of r0″=2.008 09(30) Å for 93Nb98Mo. Correction for the effects of the spin-uncoupling operator changes the estimated bond length only slightly to r0″=2.008 02(30) Å. The experimentally determined value of r0″ is compared to that predicted using previously determined multiple bonding radii of Nb and Mo. A comparison to the known diatomic molecules composed of group V and VI metal atoms is also made.
ACCESSION #
27370940

 

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