CS2分子的强场光电离研究

Study on Photoionization of Sulfur Dioxide Molecule in Intense Field

随着飞秒激光技术的发展,原子分子与强激光场之间的相互作用越来越受到人们的关注.相对于弱激光场而言,超短超强激光场作用下的原子、分子会表现出许多新的效应,如多光子电离、库仑爆炸以及非次序双电离等.CS2作为一个典型的线性三原子分子,在天体物理、大气物理、超高层气流物理学中起着十分重要的作用.利用高压脉冲超声分子束、飞秒激光和飞行时间质谱仪相结合的实验技术,研究了CS2分子电子激发态的非次序双电离和多重电离诱导解离,分析了CS2分子的非次序双电离离子产额的激光强度依赖关系、极化效应、激光偏振度效应和多重电离诱导解离.

With the development of femtosecond laser technology,more and more attention has been focused on the interaction of atoms and molecules in intense femtosecond laser field. Relative to the weak laser field,the investigation of atoms and molecules interacting with ultra-short and ultra-intense laser fields have led to many new effects,such as multiphoton ionization,Coulomb explosion and non-sequential double ionization and etc.Sulfur dioxide as a typical linear triatomic molecule,plays an important role in astrophysics,atmospheric physics,and aeronomy. In this paper,the experimental techniques of supersonic molecular beam,femtosecond laser and time-of-flight mass spectrometry are applied to investigate the nonsequential double ionization and multiple ionization induced dissociation of sulfur dioxide. The laser intensity dependence,laser ellipticity,laser polarizations effect and multiple ionization induced dissociation of non-sequential double ionization ion yield of sulfur dioxide molecule are analyzed.