ISSN:
1089-7690
Quelle:
AIP Digital Archive
Thema:
Physik
,
Chemie und Pharmazie
Notizen:
The transition lines to the low v' levels of the D 1Σ+u state are overlapped with the lines of the C 1Πu –X 1Σ+g transition. By choosing an appropriate wave number through a monochromator to observe a selected series of the D 1Σ+u (v',J±1)–X 1Σ+g (v‘,J) transition of Cs2, we measured the fluorescence intensity as a function of wave number of the laser line. 1237 spectral lines have been assigned to this band system of J'=4–108, v'=0–5. The Dunham coefficients of the D 1Σ+u state, which are useful to reproduce the measured line positions and also to construct a reasonable RKR potential curve, were determined by an iterative procedure. The molecular constants reproduced the observed 983 nonoverlapping line positions with a standard deviation of 0.0106 cm−1. The electronic term energy Te, the dissociation energy De, and the equilibrium internuclear distance Re of the D 1Σ+u state were determined to be 16 698.997 cm−1, 1547.6±0.8 cm−1, and 5.712 A(ring), respectively. The potential curves of the D 1Σ+u and C 1Πu states were estimated to cross at R=5.85 A(ring) and E=16 700 cm−1.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.455171
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