Accurate ground state potential of Cs2 up to the dissociation limit

Using the method of Doppler-free double resonance polarization spectroscopy transitions from selectively pumped levels (v′, J′) of the D1Σ+u state down to levels (v″, J″) of the X 1Σ+g state with v″= 0–140 have been measured with high accuracy. A long range analysis, based on 21 outer turning points...

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Bibliographic Details
Published in:The Journal of chemical physics 1985-06, Vol.82 (12), p.5354-5363
Main Authors: WEICKENMEIER, W, DIEMER, U, WAHL, M, RAAB, M, DEMTRÖDER, W
Format: Article
Language:English
Subjects:
Atomic and molecular collision processes and interactions
Atomic and molecular physics
Exact sciences and technology
Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions
Physics
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Summary:Using the method of Doppler-free double resonance polarization spectroscopy transitions from selectively pumped levels (v′, J′) of the D1Σ+u state down to levels (v″, J″) of the X 1Σ+g state with v″= 0–140 have been measured with high accuracy. A long range analysis, based on 21 outer turning points of the IPA potential with v″=110-130 and on calculated exchange energies and second order van der Waals coefficients Cn with n=6, 8, 10, and 12 leads to a dissociation energy De =3649.5±0.8 cm−1 (0.452 49 eV). The influence of the third order C11 contribution and the hyperfine structure on the correct value of De are briefly discussed.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.448618