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Citation: SHAO Shi-yong, LI Hai-yang, LUO Xiao-lin, XIAO Xue, NIU Dong-mei, WEN Li-hua, WANG Bin, LIANG Feng, HOU Ke-yong. Cluster- assistant Multiply Ionization of Acetonitrile by Nanosecond Laser[J]. Acta Physico-Chimica Sinica, ;2005, 21(10): 1113-1116. doi: 10.3866/PKU.WHXB20051010 shu

Cluster- assistant Multiply Ionization of Acetonitrile by Nanosecond Laser

1.
Key Laboratory of Environmental Optics & Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031； Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023

Received Date: 1 February 2005
Available Online: 15 October 2005

The photoionization of acetonitrile seeded in helium is studied by time- of- flight mass spectrometry using a 25 ns, 1064 nm Nd：YAG laser with intensity near 10¹¹ W•cm^－２. Multiply charged ions of N^q+(q=1～5) and C^q+(q=1～4) with hundreds of eV have been observed under laser beam irradiation with the densest portion of the pulsed molecular beam. An electron re-scattering and re-colliding ionization model is proposed to explain the generation of those multiply charged clusters under such low laser intensity.
- Acetonitrile;Cluster;coulomb explosion;Multiply charged ion
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