ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
We measured the Ca2 red system using filtered laser excitation to simplify the spectrum. The transition is assigned A 1Σ+u −X 1Σ+g, where X is the previously studied van der Waals ground state and A correlates adiabatically to 1S+1D calcium atoms. The A state suffers many homogeneous and heterogeneous perturbations, which are assigned to interactions with components of c 3Πu. Following deperturbation of the band spectra, we find that the A state dissociation energy, D'e is 8694±2 cm−1, with a vibrational frequency, ωe, of 126.73±0.11 cm−1, and an equilibrium internuclear separation, Re, of 3.63 A(ring). The analysis shows c 3Πu, which correlates to 1S+3P atoms, is bound by at least 1170 cm−1, with ωe≥67.7 cm−1 and Re≤4.25 A(ring). The assignment of the previously analyzed green system of Ca2 is revised to B 1Σ+u– X 1Σ+g, where B correlates adiabatically to 1S+1P atoms. The new assignment gives B a dissociation energy of 5783 cm−1, and resolves some confusion about the origin of the Ca2 red and green systems.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.450948
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