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Chin. Phys. B, 2016, Vol. 25(5): 053301    DOI: 10.1088/1674-1056/25/5/053301
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Coulomb explosion of CS2 molecule under an intense femtosecond laser field

Xiao Wang(王潇)1, Jian Zhang(张健)1, Shi-An Zhang(张诗按)1,2, Zhen-Rong Sun(孙真荣)1
1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China;
2. NYU-ECNU Institute of Physics at NYU Shanghai, Shanghai 200062, China
Abstract  We experimentally demonstrate the Coulomb explosion process of CS2 molecule under a near-infrared (800 nm) intense femtosecond laser field by a DC-sliced ion imaging technique. We obtain the DC-sliced images of these fragment ions S+, S2+, CS+, and CS2+ by breaking one C-S bond, and assign their Coulomb explosion channels by considering their kinetic energy release and angular distribution. We also numerically simulate the dissociation dynamics of parent ions CS2k+ (k=2-4) by a Coulomb potential approximation, and obtain the time evolution of Coulomb energy and kinetic energy release, which indicates that the dissociation time of parent ions CS2k+ decreases with the increase of the charge number k. These experimental and theoretical results can serve as a useful benchmark for those researchers who work in the related area.
Keywords:  Coulomb explosion      molecular photodissociation      femtosecond laser field     
Received:  03 November 2015      Published:  05 May 2016
PACS:  33.80.Gj (Diffuse spectra; predissociation, photodissociation)  
  34.20.Gj (Intermolecular and atom-molecule potentials and forces)  
  42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51132004 and 11474096), and the Science and Technology Commission of Shanghai Municipality, China (Grant No. 14JC1401500). We acknowledge the support of the NYU-ECNU Institute of Physics at NYU Shanghai, China.
Corresponding Authors:  Shi-An Zhang     E-mail:  sazhang@phy.ecnu.eddu.cn

Cite this article: 

Xiao Wang(王潇), Jian Zhang(张健), Shi-An Zhang(张诗按), Zhen-Rong Sun(孙真荣) Coulomb explosion of CS2 molecule under an intense femtosecond laser field 2016 Chin. Phys. B 25 053301

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