中国物理B ›› 2007, Vol. 16 ›› Issue (12): 3655-3661.doi: 10.1088/1009-1963/16/12/017

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Cluster-assisted generation of multicharged ions in nanosecond laser ionization of carbon bisulfide clusters at 1064nm

李海洋1, 肖 雪2, 牛冬梅3, 罗晓琳3   

  1. (1)Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China; (2)Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences, Hefei 230031, China; (3)Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences, Hefei 230031, China;Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
  • 出版日期:2007-12-20 发布日期:2007-12-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 20573111) and the Centre for Computational Science, Hefei Institutes of Physics, China (Grant No 0331405002).

Cluster-assisted generation of multicharged ions in nanosecond laser ionization of carbon bisulfide clusters at 1064nm

Xiao Xue(肖雪)a), Li Hai-Yang(李海洋)b)†, Niu Dong-Mei(牛冬梅)a)b), and Luo Xiao-Lin(罗晓琳)a)b)   

  1. a Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; b Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
  • Online:2007-12-20 Published:2007-12-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 20573111) and the Centre for Computational Science, Hefei Institutes of Physics, China (Grant No 0331405002).

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摘要： The photoionization of seeded carbon bisulfide molecular beam by a 1064\,nm nanosecond Nd-YAG laser with intensities varying from $0.8\times10^{11}$ to $5.6\times10^{11}$\,W/cm$^{2}$ have been studied by time-of-flight mass spectrometry. Multiply charged ions of S$^{q + }$ ($q$ = 2--6) and C$^{q +}$ ($q$ = 2--4) with kinetic energy of hundreds of electron volts have been observed, and there are strong experimental evidences indicating that those multicharged ions originate from the ionization of CS$_{2}$ neat clusters in the beam. An electron recolliding ionization model is proposed to explain the appearance of those multiply charged atomic ions under such low laser intensities.

关键词: carbon bisulfide, multicharged ions, cluster, coulomb explosion

Abstract: The photoionization of seeded carbon bisulfide molecular beam by a 1064 nm nanosecond Nd-YAG laser with intensities varying from $0.8\times10^{11}$ to $5.6\times10^{11}$ W/cm$^{2}$ have been studied by time-of-flight mass spectrometry. Multiply charged ions of S$^{q + }$ ($q$ = 2--6) and C$^{q +}$ ($q$ = 2--4) with kinetic energy of hundreds of electron volts have been observed, and there are strong experimental evidences indicating that those multicharged ions originate from the ionization of CS$_{2}$ neat clusters in the beam. An electron recolliding ionization model is proposed to explain the appearance of those multiply charged atomic ions under such low laser intensities.

Key words: carbon bisulfide, multicharged ions, cluster, coulomb explosion

中图分类号:  (Stability and fragmentation of clusters)

  • 36.40.Qv
33.80.Eh (Autoionization, photoionization, and photodetachment)