Hg原子6~3P_1→6~1S_0态的系际交叉跃迁及其6~1P_1态与6~3P

THE 6~3P_1→6~1S_0 INTERCOMBINATION TRANSITION AND SINGLET ADMIXTURE OF THE 6~3P_1 STATE FOR MERCURY ATOM

Ｈｇ原子６￣３Ｐ＿１→６￣１Ｓ＿０态２５３．６５２ｎｍ紫外辐射是系际交叉跃迁最著名的一例，可归因于其单重态６￣１Ｐ＿１与三重态６￣３Ｐ＿１的组态混合．计算结果表明，对于Ｈｇ原子的６ｓ６ｐ组态，ＬＳ耦合方式仍是其较好描述．

The 253．652 nm ultraviolet emission （intercombination line）from the6~3P_1→6~1S_0 optical decay for mercury atom is the most famous example ofthe intercombination transi－tion. This can be attributed to that the spin-orbit interaction with the mercury atom results inasmall but significant singlet（the6~1P_1 state）admixture to the6~3P_1 state（i．e．，this state isnot a pure triplet state）．The calculated resuIt indicates that the LS coupling is still a suitabledeseription for the 6s6p configuration ofmercury atom.