Abstract

The rotational structure of the laser-excited fluorescence of yttrium monoiodide, recorded on a Fourier transform spectrometer, was analyzed, enabling the characterization of two excited states at Te ∼ 20 690 and ∼24 100 cm−1. Observation of the ground state X1Σ+ is extended up to v = 15. A scheme for the electronic structure is proposed, involving the X1Σ+, B1Π, D1Π, Ω1, and possibly A(1Δ) states.

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