报道在镁金属蒸气中利用两束激光三光子共振激发原子３ｓｎｐ１Ｐ中高里德堡态时，观察到随泵浦激光功率的增强，出现３ｓ４ｓ１Ｓ０－３ｓｎｓ１Ｓ０、３ｓｎｄ１Ｄ２（ｎ≈１８～３２）偶宇称态偶极禁戒跃迁增强，以及３ｓｎｓ１Ｓ０能级移动现象，并解释为光泵过程引起的原子激发态碰撞效应。利用禁戒跃迁首次测定了Ｍｇ３ｓｎｓ１Ｓ０（ｎ＝２２～３０）能级。 It is reported that the 3s4s1S0-3sns1S0 and 3snd1D2 (n≈18-32) even parity states appear with the increase of the pump laser power in the high-Rydberg states of 3snp1P excited by two laser three-photon resonances in magnesium metal vapor. Dipolar forbidden transitions are enhanced and 3sns1S0 level shifts are explained and explained as the effect of atomic excited state collisions caused by the optical pumping process. The first use of forbidden transition measured Mg3sns1S0 (n = 22 ~ 30) level.