Laser induced fluorescence and dispersed fluorescence spectra of zirconium monoxide between 460 and 560 nm

New bands observed between 460 and 560 nm following laser ablation of zirconium metal can be attributed to ZrO. A band system with origin near 513.3 nm is identified from dispersed fluorescence measurements as the predicted E1Π–X1Σ+ system. Vibrational constants for the E state are ωe ≈ 852, ωexe ≈ 1.5 cm−1. Data on the C1Σ+ and e3Π1 states have been extended.