The results of saturated absorption spectroscopy of the intercombination1S0-3P1transition of magnesium atoms at 457 nm in an external absorption cell are presented. A laser system based on a Ti:Sa laser with frequency doubling in a LBO nonlinear crystal was used in these experiments. Saturated absorption resonances of magnesium in an external cell at the1S0-3P1transition have been obtained for the first time. Pressure broadening of resonances equal to 12.5 ± 1.5 kHz/mTorr has been measured. © 2001 Elsevier Science B.V. All rights reserved.
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