Abstract
The doubly-excited 3Σ + u (4 3P, 4 3P) state of Zn 2 was populated using pump and probe methods with time resolution. Structured excitation and fluorescence spectra were observed in the 300–330 nm region and are ascribed to 3Σ + u (4 3P, 4 3P)↔ 3Π g(4 3P) vibronic transitions, with partial resolution of the fine structure. An analysis of the spectra yielded the vibrational frequencies, relative energy, and relative equilibrium internuclear separations for the 3Σ + u and 3Π g states. The Zn 2 excitation and fluorescence spectra contained a number of atomic lines whose origin was probed in a subsidiary experiment.
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