用波长为５７８．７ｎｍ的激光双光子共振激发Ｎａ－Ｎａ２混合样品中的钠原子（３Ｓ→４Ｄ），在紫外区３２０～３７０ｎｍ范围内得到了四十多条受激辐射线。标识和分析的结果表明，钠原子中共振增强的四波混频光作为一个次级激发源将Ｎａ２从基态Ｘ∑＋共振激发到Ｃ１ｘ态，继而由Ｃ１ｚ向Ｘ１∑＋态跃迁产生了上述的紫外受激辐射线。 The sodium atom (3S → 4D) in the Na-Na2 mixed sample was excited by a two-photon resonance laser at a wavelength of 578.7 nm, and more than 40 stimulated radiation were obtained in the 320-370 nm UV range. The results of identification and analysis show that the four-wave mixing light with enhanced resonance in sodium atom is used as a secondary excitation source for the resonance excitation of Na2 from the ground state XΣ + to the C1x state, and then the transition from C1z to X1Σ + state produces the above UV stimulated radiation.