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Absolute intensity measurements of resonant third-harmonic generation in a Sr-Xe mixture have been performed using a flash-lamp-pumped dye laser. The third-harmonic power increased by about 3 orders of magnitude with respect to the pure Sr system by adjusting a pressure ratio of pXepSr=53. Excellent agreement with theory is obtained provided the absorption cross section σ₃=3.5×10^-18 cm² of Sr at the third-harmonic wavelength of 191.97 nm has been taken into account. The absorption cross section limits the conversion efficiency to 2 ×{} 10^-5 for an input intensity of 5 ×{} 10⁶ W/cm². Up to these intensities no saturation effects were observed.
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Scheingraber et al. (1978) studied this question.
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