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Citation: Kong Xiang-Lei, Luo Xiao-Lin, Zhang Xian-Yi, Niu Dong-Mei, Zang Shu-Dong, Kan Rui-Feng, Pei Ke-Mei, Li Yi-Min, Liu Ying, Li Hai-Yang. Generation of Multi-charge Carbon Ions in Laser-induced Ionization of Benzene under Intense Nanosecond Laser Fields[J]. Acta Physico-Chimica Sinica, ;2003, 19(05): 469-473. doi: 10.3866/PKU.WHXB20030519 shu

Generation of Multi-charge Carbon Ions in Laser-induced Ionization of Benzene under Intense Nanosecond Laser Fields

1.
Laboratory of Environmental Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,

Received Date: 10 September 2002
Available Online: 15 May 2003

The photoionization of benzene seeded in He, N2, Ar gases by an intense 25 ns Nd-YAG 532 nm laser has been studied by time-of-flight mass spectrometry. At the laser intensity about 1010～1011 W•cm－2, strong multi-charged ions Cq+(q=1～3) appeared in the mass spectra when Ar was used as carrier gas. From the peak splitting, the most probable kinetic energies of C2＋ and C3＋ are calculated to be 12.9 eV and 37.5 eV, respectively. From the experimental results of changing the He, N2, Ar carrier gases, their pressure and the laser intensity, we can draw the conclusion that those multi-charge ions come from the Coulomb explosion of benzene cluster ions.
- Benzene;Nanosecond laser;Multi-charge ions;Coulomb explosion
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