| 氦液滴中羰基硫分子的光解动力学 |
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| 引用本文： | 张翠梅,张志国,黄存顺,张群,陈旸.氦液滴中羰基硫分子的光解动力学[J].物理化学学报,2013,29(9):1886-1890. |
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| 作者姓名： | 张翠梅 张志国 黄存顺 张群 陈旸 |
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| 作者单位： | 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 |
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| 基金项目： | supported by the National Natural Science Foundation of China(21073187,21273212,21173205);National Key Basic Research Program of China(973)(2010CB923302);100 Talents Program of Chinese Academy of Sciences;Knowledge Innovation Program of Chinese Academy of Sciences,and USTC-NSRL Joint Funds,China(KY2340000021)~~ |
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| 摘 要： | 用时间切片速度成像方法研究了氦液滴中羰基硫(COS)分子的光解动力学. 从共振增强(2+1)电离的CO光谱中发现在氦液滴环境中解离产物CO的转动冷却比振动冷却更有效.利用速度成像采集到的CO (v=0)和CO (v=1)的影像在角分布上都呈现出各向同性的特点. 产物平动能分布的结果表明尽管大部分的平动能都被超流体环境所弛豫, 但振动激发态产物CO (v=1) 的平均平动能比振动基态产物CO (v=0) 的平均平动能高.对羰基硫分子在氦液滴中的光解动力学机理进行了讨论.
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| 关 键 词： | 氦液滴 时间切片速度成像 羰基硫 |
| 收稿时间： | 2013-05-03 |
| 修稿时间： | 2013-06-19 |
Photodissociation Dynamics of Carbonyl Sulfide in Helium Droplets |
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| ZHANG Cui-Mei;ZHANG Zhi-Guo;HUANG Cun-Shun;ZHANG Qun;CHEN.Photodissociation Dynamics of Carbonyl Sulfide in Helium Droplets[J].Acta Physico-Chimica Sinica,2013,29(9):1886-1890. |
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| Authors: | ZHANG Cui-Mei;ZHANG Zhi-Guo;HUANG Cun-Shun;ZHANG Qun;CHEN |
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| Institution: | 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 |
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| 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. |
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| Keywords: | Heliumdroplet Time-sliced ion imaging OCS |
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