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Chin. Phys. B, 2013, Vol. 22(2): 023302    DOI: 10.1088/1674-1056/22/2/023302
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Low-energy structure in the ionization of argon: Comparison of experiment with theory

Feng Li-Qiang (冯立强)a, Chu Tian-Shu (楚天舒)a b, Wang Li (王利)a
a State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
b Institute for Computational Sciences and Engineering, Laboratory of New Fiber Materials and Modern Textiles, the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, China
Abstract  The above-threshold ionization of argon in an intense 70-fs, 400-nm linearly polarized laser pulse has been investigated by the velocity map imaging techniques, combined with an attosecond-resolution quantum wave packet dynamics method. There is a quantitative agreement in all dominant features between the experiment and the theory. Moreover, a peak-splitting phenomenon in the first energy peak has been observed at high pulse intensity. Further, through the theoretical analysis, an ac Stark splitting with evident resonant and nonresonant ionization pathways has been found to be the physical reason for the experimental observations.
Keywords:  above threshold ionization      angular distribution      Stark splitting  
Received:  04 July 2012      Revised:  03 August 2012      Accepted manuscript online: 
PACS:  33.80.Rv (Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))  
  33.60.+q (Photoelectron spectra )  
Fund: Project supported by the National Natural Science Foundations of China (Grant Nos. 10874096 and 20633070).
Corresponding Authors:  Chu Tian-Shu, Wang Li     E-mail:  tschu@dicp.ac.cn; tschu008@163.com; liwangye@dicp.ac.cn

Cite this article: 

Feng Li-Qiang (冯立强), Chu Tian-Shu (楚天舒), Wang Li (王利) Low-energy structure in the ionization of argon: Comparison of experiment with theory 2013 Chin. Phys. B 22 023302

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