Luminescence of Xe2Cl* upon laser excitation of Cl2 – Xe mixtures in a wide pressure range

The luminescence of Xe₂Cl* excimer upon optical excitation of high-pressure Cl₂ – Xe mixtures by XeCl laser pulses (λ = 308 nm) with different energies is investigated. It is shown that small-signal gain of the Xe₂Cl amplifier may reach ~1.3 × 10^-1 cm^-1 in a mixture of Cl₂ and Xe with partial pressures of 4 Torr and 9 atm, respectively, and an excitation fluence of 10²⁶ photons cm^-2 s^-1.