Cluster-assisted multiple ionization of acetone by intense nanosecond laser

被引：4
|
作者：
Xue, X
Li, HY [1 ]
Luo, XL
Niu, DM
Wen, LH
Wang, B
Liang, F
Hou, KY
Dong, C
Shao, SY
机构：
[1] Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China
[2] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
来源：
ACTA PHYSICA SINICA | 2006年 / 55卷 / 02期
关键词：
acetone; cluster; Coulomb explosion; multiply charged ion;
D O I：
10.7498/aps.55.661
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The photoionization of acetone seeded in helium is studied by time-of-flight mass spectrometry using a 25 ns, 532 nm Nd: YAG laser with intensity in the range of 10(10)-10(11) W/cm(2). Multiply charged ions of OP+ (p = 2-4) and Cq+ (q = 2-4) of tens of eV have been observed when the laser beam irradiates the most dense part of the pulsed molecular beam. The intensity and the kinetic energy of the multiply charged ions increase with the increasing of the laser energy. An electron re-scattering and re-colliding ionization model is proposed to explain the appearance of the multiply charged ions under such low laser intensity.
引用
收藏
页码：661 / 666
页数：6
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