氦液滴中羰基硫分子的光解动力学

doi:10.3866/PKU.WHXB201306191

Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (09): 1886-1890.doi: 10.3866/PKU.WHXB201306191

• THERMODYNAMICS, KINETICS, AND STRUCTURAL CHEMISTRY • Previous Articles Next Articles

Photodissociation Dynamics of Carbonyl Sulfide in Helium Droplets

ZHANG Cui-Mei^1,2, ZHANG Zhi-Guo^1,2, HUANG Cun-Shun², ZHANG Qun¹, CHEN Yang¹

1 Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China;
2 State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning Province, P. R. China

Received:2013-05-03 Revised:2013-06-19 Published:2013-08-28
Contact: HUANG Cun-Shun, ZHANG Qun, CHEN Yang E-mail:cshuang@dicp.ac.cn;qunzh@ustc.edu.cn;yangchen@ustc.edu.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (21073187, 21273212, 21173205), National Key Basic Research Programof China (973) (2010CB923302), 100 Talents Programof Chinese Academy of Sciences, Knowledge Innovation Programof Chinese Academy of Sciences, and USTC-NSRL Joint Funds, China (KY2340000021).

Abstract

Abstract:

The photodissociation dynamics of carbonyl sulfide (OCS) in helium droplets was studied using a velocity-map-imaging technique. The CO fragments were detected by (2+1)-resonance-enhanced multiphoton ionization. It was found that in the helium droplet environment, rotational cooling is much more efficient than vibrational cooling. The velocity map images for both CO (v=0) and CO (v=1) exhibit nearly isotropic angular distributions. The kinetic energy distributions show that most of the translational energies are relaxed in the finite-sized superfluid helium system. However, the average translational energies of the CO (v=1) images are higher than those of the CO (v=0) images. The relevant mechanism is briefly discussed.

Key words: Heliumdroplet, Time-sliced ion imaging, OCS

MSC2000:

O643

ZHANG Cui-Mei, ZHANG Zhi-Guo, HUANG Cun-Shun, ZHANG Qun, CHEN Yang. Photodissociation Dynamics of Carbonyl Sulfide in Helium Droplets[J].Acta Phys. -Chim. Sin., 2013, 29(09): 1886-1890.

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Photodissociation Dynamics of Carbonyl Sulfide in Helium Droplets

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