TITLE

Doubly excited 1 3∑-g state of Na2: Observation and calculation

AUTHOR(S)
Liu, Yaoming; Li, Jian; Xue, Meng; Chen, Dieyan; Li, Li; Jeung, Gwang-Hi
PUB. DATE
November 1995
SOURCE
Journal of Chemical Physics;11/1/1995, Vol. 103 Issue 17, p7213
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The v=0–57 levels of the 3p+3p doubly excited 1 3∑-g state of Na2 have been observed by pulsed perturbation facilitated optical–optical double resonance (PFOODR) fluorescence excitation spectroscopy. The Tv=57=39 943.5 cm-1 of the 1 3∑-g state is 385 cm-1 above the X 2∑+g v+=0, J+=0 ionization threshold and 9 cm-1 below the Na (3p,2P3/2)+Na(3p,2P1/2) dissociation limit. No significant line broadening was observed above the X 2∑+g v+=0, J+=0 ionization threshold with our resolution. Molecular constants and the Rydberg–Klein–Rees (RKR) potential curve have been obtained from the observed data. The major constants are Te=36 519.13(17) cm-1, ωe=93.635(41) cm-1, and Be=0.118 95(90) cm-1. We have carried out an all-electron ab initio calculation for the 1 3∑-g state and transition dipole moment for the 1 3∑-gb 3Πu system of Na2. Molecular constants calculated from our ab initio potential curve have reasonable agreement with the experimental constants. © 1995 American Institute of Physics.
ACCESSION #
7619888

 

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