Open AccessCluster-assisted multiple ionization of acetone by intense nanosecond laser
Author(s) -
Xue Xiao,
Haiyang Li,
Xiaolin Luo,
Dongmei Niu,
Liping Wen,
Bin Wang,
Feng Liang,
Hou Ke-Yong,
Dong Cao,
Shiyong Shao
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.661
Subject(s) - cluster (spacecraft) , ionization , nanosecond , laser , acetone , materials science , atomic physics , physics , computer science , optics , chemistry , ion , quantum mechanics , organic chemistry , programming language
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 1010—1011 W/cm2. 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.