Contribution of resonance excitation on ionization of OCS molecules in strong laser field

30th International Conference on Photonic, Electronic, and Atomic Collisions

Yu, Jiaqi^1,2 ; Hu, Wenhui^1,2 ; He, Lanhai^1,2 ; Wang, Chuncheng^1,2 ; Luo, Sizuo^1,2 ; Ding, Dajun^1,2

Institute of Atomic and Molecular Physics, Jilin University, Changchun, China^1

Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun, China^2

关键词: Electron energies;    Laser fields;    Laser intensities;    Multiphoton ionization;    Photoelectron energy spectra;    Resonance excitation;    Strong laser field;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/875/4/032030/pdf
DOI  :  10.1088/1742-6596/875/4/032030

来源: IOP

【 摘 要 】

The resonant enhanced multiphoton ionization (REMPI) of OCS molecules has been studied by tracing the electron energy shift with the laser intensity dependent photoelectron energy spectra. We find that two excited states (1Δ and1Π) have been involved in the ionization of OCS at 800 nm and the REMPI through a certain excited state can be selectively controlled by varying the laser intensity. Furthermore, the REMPIof OCS through 4sσ?Rydberg states at 400 nm laser fields has also been identified by angular distribution of electrons.