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- W4224864023 abstract "A highly excited electronic state of dicopper is observed and characterized for the first time. The [39.6]0u+-X1Σg+(0g+) system is measured at rotational resolution by using degenerate and two-color resonant four-wave-mixing, as well as laser induced fluorescence spectroscopy. Double-resonance experiments are performed by labeling selected rotational levels of the ground state by tuning the probe laser wavelength to transitions in the well-known (1-0) band of the B0u+-X1Σg+(0g+) electronic system. Spectra obtained by scans of the pump laser in the UV wavelength range were then assigned unambiguously by the stringent double-resonance selection rules. The absence of a Q-band suggests a parallel transition (ΔΩ = 0) and determines the term symbol of the state as 0u+ in Hund's case (c) notation. The equilibrium constants for 63Cu2 are Te = 39 559.921(92) cm-1, ωe = 277.70(14) cm-1, Be = 0.104 942(66) cm-1, and re = 2.2595(11) Å. These findings are supported by high-level ab initio calculations at the MRCI+Q level, which clearly identifies this state as resulting from a 4p ← 3d transition. In addition, three dark perturber states are found in the v = 1 and v = 2 vibrational levels of the new state. A deperturbation analysis characterizes the interaction and rationalizes the anomalous dips in the excitation spectrum of the [39.6]0u+-X1Σg+(0g+) system." @default.
- W4224864023 created "2022-04-27" @default.
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- W4224864023 date "2022-05-10" @default.
- W4224864023 modified "2023-10-14" @default.
- W4224864023 title "Rovibrational investigation of a new high-lying u+ state of Cu2 by using two-color resonant four-wave-mixing spectroscopy" @default.
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- W4224864023 doi "https://doi.org/10.1063/5.0087743" @default.
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