Acta Phys. -Chim. Sin. ›› 2000, Vol. 16 ›› Issue (10): 932-935.doi: 10.3866/PKU.WHXB20001012

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Ionization of Methyl Acetate in Ultra-intense Lasser Field

Xiong Yi-Jia, Wu Cheng-Yin, Gao Zhen, Kong Fan-Ao, Yang Xiao-Dong, Lu Hai-Ou, Xu Zhi-Zhan   

  1. State Key Laboratory of Molecular Reaction Dynamics,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080|Laboratory for High Intensity Optics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800
  • Received:2000-01-18 Revised:2000-03-01 Published:2000-10-15
  • Contact: Kong Fan-Ao E-mail:kong@mrdlab.icas.ac.cn

Abstract:

The tunneling ionization of methyl acetate in the laser intensity range of 4.8× 1013 W• cm-2 to 1.3×1014 W•cm-2 was studied. The modified Keldysh parameter was calculated by the ab initio method. The tunneling probability was calculated by the WKB method. When the laser intensity was larger than 1014 W• cm- 2,methyl acetate mainly took tunneling ionization mechanism. When the laser intensity was lower than 1014 W•cm-2 multiphoton ionization occurred.

Key words: Methyl aceltate, Tunneling ionization, Femtosecond laser, Keldysh parameter