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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.