Luo Sizuo, Hu Wenhui, Yu Jiaqi, Li Xiaokai, He Lanhai, Wang Chuncheng, Liu Fuchun, Ding Dajun
Institute of Atomic and Molecular Physics, and Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University , Changchun 130012, China.
J Phys Chem A. 2017 Sep 7;121(35):6547-6553. doi: 10.1021/acs.jpca.7b05588. Epub 2017 Aug 24.
Strong field sequential ionization of symmetric-top CHI molecules is studied experimentally by using a combined method of femtosecond laser-induced impulsive alignment and time-of-flight mass spectrometry. Both alignment- and angular-dependent ion yields have been measured, and the sequential ionization of a multielectron has been discussed. It is found that the maximum ionization occurs when the polarization of probe laser is perpendicular to the internuclear axis of molecules, and the signal of fragment ion peaks at the polarization of the probe laser is parallel to the internuclear axis of molecules. The angular distribution of ions indicated that ionization of π-type orbitals corresponds to generation of charged parent ions and ionization of σ-type orbitals corresponds to generation of fragment ions. The sequential release of multielectrons for Coulomb explosion channels is studied by analysis of the time evolutions of multicharged I (n = 1-4) signals.
通过使用飞秒激光诱导脉冲取向和飞行时间质谱联用的方法，对对称顶分子CHI的强场序列电离进行了实验研究。测量了取向相关和角度相关的离子产率，并讨论了多电子的序列电离。研究发现，当探测激光的偏振方向垂直于分子的核间轴时，电离达到最大值，并且在探测激光的偏振方向平行于分子的核间轴时，碎片离子信号出现峰值。离子的角分布表明，π型轨道的电离对应于带电母离子的产生，而σ型轨道的电离对应于碎片离子的产生。通过分析多电荷I（n = 1-4）信号的时间演化，研究了库仑爆炸通道中多电子的序列释放。
