Luminescence Spectra of High-Pressure Cl2/Xe Mixtures under Laser Pumping

Spectra of luminescence pulses of Cl 2 /Xe mixtures at a pressure of 0.8–4 Torr Cl 2 and 2–10 atm Xe, excited by XeCl laser radiation are experimentally measured. Radiation of thin (0.5 cm) and thick (30 cm) active layers is observed. The spectra are wide bands with smoothed components having maxima at 412, 435, 460, 485, 512, 547, and 585 nm. These components are caused by transitions from several vibrational levels of 4 2 Γ state of Xe 2 Cl*. The type of spectra depends on the active layer thickness; spectra change significantly in thick layers, i.e., collective effects appear in the form of absorption and amplification.