243—263nm S原子Rydberg态的(2+1)共振增强多光子电离

(2+1) REMPI SPECTRUM OF RYDBERG STATES OF S ATOMS IN THE 243 263nm REGION 

在２４３—２６３ｎｍ波长范围，测量了Ｓ＋分质量激发谱，得到ＳＯ２分子光解产生的Ｓ原子近５０条（２＋１）共振增强多光子电离谱线．除了来自Ｓ原子基态３ｐ４３Ｐ２，１，０直至ｎ＝１０的Ｒｙｄｂｅｒｇ态３Ｐ，３Ｄ，３Ｆ的许多双光子跃迁谱线外，观察到若干新的１Ｐ０，５Ｓ０←３Ｐ自旋禁戒跃迁和从Ｓ的１Ｄ２激发态到偶宇称自电离Ｒｙｄｂｅｒｇ态ｎｐ１，３Ｄ，１，３Ｆ的双光子跃迁谱线．对若干跃迁的相对线强度进行了计算。

Abstract About 50 spectral lines due to the (2+1) resonance enhanced multiphoton ionization (REMPI) of atomic sulfur,generated in the sequential multiphoton dissociation of SO 2 at probing wavelengths,in the 243 263nm region has been observed.Besides most of the lines which are due to the two photon transitions from the ground states 3P 2,1,0 to the Rydberg states 3P, 3D, 3F until n =10 of S atom,several new lines including the spin forbbiden transition 1P 0, 5S 0← 3P and the two photon transitions from the excited state 1D 2 to the Rydberg states n p 1,3 D, 1,3 F are observed.Intensities of some lines have been calculated and compared with the experimental results.