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

doi:10.1088/1009-1963/16/12/017

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

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)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)

^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).

摘要/Abstract

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)

肖雪, 李海洋, 牛冬梅, 罗晓琳. Cluster-assisted generation of multicharged ions in nanosecond laser ionization of carbon bisulfide clusters at 1064nm[J]. 中国物理B, 2007, 16(12): 3655-3661.

Xiao Xue(肖雪), Li Hai-Yang(李海洋), Niu Dong-Mei(牛冬梅), and Luo Xiao-Lin(罗晓琳). Cluster-assisted generation of multicharged ions in nanosecond laser ionization of carbon bisulfide clusters at 1064nm[J]. Chinese Physics, 2007, 16(12): 3655-3661.

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

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

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