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Dimer vibrational frequency = 185.5cm-1
Dimer force constant = 0.89 mdyne/Å
Spectroscopic dissociation energy = 2.8(4) eV
"Spectroscopy of Yttrium Dimers in Argon Matrices"
Li Fang, Xiaoyu Chen, Xiaole Shen, Yifei, Liu,
D. M. Lindsay and John R.Lombardi
Low Temperature Physics, 26, 752 (2000). And Fizika Nizkikh Temperatur 26, 1011 (2000)
Abstract
The absorption and resonance Raman spectra of yttrium dimers (Y2)
in argon matrices have been measured for the first time. The absorption
spectrum (scattering depletion spectrum SDS) shows a weak, broad transition
centered near 485 nm. Resonance Raman spectra obtained by exciting into
this absorption band with several visible laser lines (465.5nm ~ 496.5nm)
give a single, sharp progression with up to ten Stokes transitions. These
data give we
= 185.5(7) cm-1, with wexe
= 0.38(5) cm-1, leading to a spectroscopic dissociation energy
of De = 2.8(4) eV. Comparison of our results with several ab
initio calculations adds confirmation to the assignment of the ground state
of Y2 to be 1Sg+
state.
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