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• W1973993654 abstract "The three lowest adiabatic potential energy curves for each of the two dipole-allowed symmetries, Σu+1 and Πu1, are calculated in the multireference configuration–interaction framework. Diabatic potentials and corresponding coupling elements are obtained by diagonalizing the electronic operator r2 which serves to discriminate Rydberg and valence type states. A large basis set and judiciously chosen active orbital and configuration spaces furnish smooth and reliable potential curves. However, a vibrational analysis of the coupled systems in diabatic representation still shows some disappointing deviations from the experimental interference patterns of overlapping absorption bands that are highly sensitive to potential energy differences. Starting from the calculated curves, a fitting procedure accounting also for empirical information yields potential energy curves and diabatic coupling elements that reproduce all details of the experiment very well. These recommended results also serve to identify residual defects in the ab initio curves mainly as vertical shifts. The performance of other commonly used ab initio methods for the calculation of excited states is briefly discussed." @default.
• W1973993654 created "2016-06-24" @default.
• W1973993654 creator A5047434642 @default.
• W1973993654 creator A5080429301 @default.
• W1973993654 date "2001-10-08" @default.
• W1973993654 modified "2023-09-25" @default.
• W1973993654 title "Dipole-allowed excited states of N2: Potential energy curves, vibrational analysis, and absorption intensities" @default.
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• W1973993654 doi "https://doi.org/10.1063/1.1400139" @default.
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