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学科主题: 物理化学
题名: Competition between Direct and Indirect Dissociation Pathways in Ultraviolet Photodissociation of HNCO
作者: Yu, Shengrui1;  Su, Shu1;  Dorenkamp, Yvonne2, 3;  Wodtke, Alec M.2, 3;  Dai, Dongxu1;  Yuan, Kaijun1;  Yang, Xueming1
通讯作者: 杨学明 ;  袁开军
刊名: JOURNAL OF PHYSICAL CHEMISTRY A
发表日期: 2013-11-21
DOI: 10.1021/jp312793k
卷: 117, 期:46, 页:11673-11678
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: 11
项目归属: 1102
产权排名: 待补充
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
资助者: 1,1
研究领域[WOS]: Chemistry ;  Physics
英文摘要: Photodissociation dynamics of HNCO at photolysis wavelengths between 200 and 240 nm have been studied using the H-atom Rydberg tagging time-of-flight technique. Product translational energy distributions and angular distributions have been determined. At low photon energy excitation, the product translational energy distribution is nearly statistical and the angular distribution is isotropic, which is consistent with an indirect dissociation mechanism, i.e., internal conversion from S-1 to S-0 surface and dissociation on S-0 surface. As the photon energy increases, a direct dissociation pathway on S-1 surface opens up. The product translational energy distribution appears to be quite nonstatistical and the product angular distribution is anisotropic. The fraction of direct dissociation pathway is determined to be 36 +/- 5% at 202.67 nm photolysis. Vibrational structures are observed in both direct and indirect dissociation pathways, which can be assigned to the NCO bending mode excitation with some stretching excitation.
关键词[WOS]: INTERNAL ENERGY-DISTRIBUTION ;  ISOCYANIC ACID HNCO ;  PHOTOINITIATED DECOMPOSITION ;  CORRELATED DISTRIBUTIONS ;  SPIN-ORBIT ;  AB-INITIO ;  193 NM ;  DYNAMICS ;  STATE ;  SPECTROSCOPY
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000327557100008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119297
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Univ Gottingen, Inst Phys Chem, Gottingen, Germany
3.Max Planck Inst Biophys Chem, D-37077 Gottingen, Germany

Recommended Citation:
Yu, Shengrui,Su, Shu,Dorenkamp, Yvonne,et al. Competition between Direct and Indirect Dissociation Pathways in Ultraviolet Photodissociation of HNCO[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2013,117(46):11673-11678.
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