Spectroscopic studies of diatomic noble gas halides: Analysis of spontaneous and stimulated emission from XeCl

Abstract

A XeCl emission band system with peak intensity near 3080 Å is reported and analyzed. The vibrational analysis of this spectrum includes 24 violet‐degraded bands assigned to Xe³⁵Cl and Xe³⁷Cl, and yields (for Xe³⁵Cl) ΔT_e=32 405 cm⁻¹, ω_e′=195.2 cm⁻¹, ω_e^″=26.3 cm⁻¹, and D_e^″=255 cm⁻¹. The weakly bound ²Σ⁺ ground state of XeCl resembles a van der Waals state, whereas the excited state is the analog of the CsCl ground state. Approximate potential curves are derived for these XeCl states. Lasing is observed on the 0–1, 0–2, and 0–3 bands of this transition, with a peak output power of 1.5×10⁴ W.