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A New Product Channel in the Energy Transfer of CO( a,v')+ NO(X)
Zhang Lei,Zhang Min,Li Xuechu,Wang Xiuyan,Shen Guanlin*
Author NameAffiliationE-mail
Zhang Lei State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023  
Zhang Min State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023  
Li Xuechu State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023  
Wang Xiuyan State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023  
Shen Guanlin* State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023 shengl@dicp.ac.cn 
Abstract:
Under single-collision conditions,a beam of metastable molecules CO( a,v')generated by DC discharge was allowed to collide with a beam of NO(X)at a fixed angle of 90o . The collision-induced emission from the interaction region was collected at right angles to the beam plane by a lens set and dispersed by a 1 m monochromator where a cooled photomultiplier tube was mounted on the exit slit. The signal from the PMT was transmitted via a discriminator,a photon counter and a boxcar integrator into a computer for storing and processing. Two broadband emissions were observed around the wavelengths of 780 and 860 nm,which can be assigned to NO(b-a) Ogawa bands Δv = + 4 and + 3 sequences,respectively,and referred to the spectroscopic data given by Huber. At the collision energy of 0. 05 eV in the present experimental conditions,the electronic energy of CO( a,v' = 0)(6. 01 eV)was not enough to excite NO(X)to NO(b,v' = 4,5)(ΔE > 6. 11 eV). So,what was in act in the energy transfer was the vibrational excitation of CO(a,v' > 0),and the higher the vibrational excitation of CO(a,v') was,the stronger the emission intensity of NO( b-a)could be obtained. It is thought that electron exchange between CO(a)and NO(X)may be operative through the formation of a complex OCNO. The newly discovered formation of NO( b)channel could be well explained considering the energy conservation,spin conservation and electron exchange mechanism.
Key words:  Single collision,Energy transfer,Electron exchange mechanism
FundProject:
CO( a)+ NO(X)传能体系中的新传能通道
张雷,张敏,李学初,王秀岩,沈关林*
摘要:
在相对碰撞平动能为0. 05 eV 的分子束实验条件下,研究了亚稳态CO( a)+ NO(X)的E-E 传能通道.通过测量和分析交碰区的传能发射光谱,在780 和860 nm 处观测到了NO(b - a)跃迁Ogawa 带的Δv = + 4 和Δv = + 3 序的发射光谱. 从而首次在实验上直接证实了传能过程中第四通道的存在(CO(a)+ NO(X)→CO(X)+ NO(b)). 这一通道的发现解释了前人测量到的在CO(a)与NO(X)碰撞传能过程中CO( a)的猝灭速率远大于NO(A,B)生成速率的实
关键词:  分子间传能  传能通道  单次碰撞
DOI:10.1088/1674-0068/17/1/10-14
分类号: