The electronic (yellow and violet) emission spectra of zirconium nitride

Abstract

Two emission systems of ZrN have been obtained under high resolution at 5700 and 4050 Å. They are the A²Π → X²Σ and B²Σ → X²Σ systems analogous to those previously known for the isoelectronic molecules ScO and TiN.Analysis of the B²Σ → X²Σ system of the ⁹⁰Zr¹⁴N species yields the values B₀ = 0.4587 cm⁻¹ and B₀ = 0.4830 cm⁻¹ for the B and X states respectively, while for the A²Π state (which is severely perturbed at low J for the ⁹⁰Zr¹⁴N species) the⁹⁰Zr¹⁵N species gives B₀ = 0.4523 cm⁻¹ and this yields a (calculated) value for the A state of the ⁹⁰Zr¹⁴N species of 0.4799 cm⁻¹.There are four perturbations in the ²Π_3/2 state of both the Zr¹⁴N and Zr¹⁵N species.