CAJ | 학술논문

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△v=+4和△v=+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)生成速率的实验结果,并进一步证实了这一"经典"E-E传能体系为电子交换机理的传能观点.
재상대팽당평동능위0.05 eV적분자속실험조건하,연구료아은태CO(a)+NO(X)적E-E전능통도.통과측량화분석교팽구적전능발사광보,재 780화860 nm처관측도료NO(b-a)약천Ogawa대적△v=+4화△v=+3서적발사광보.종이수차재실험상직접증실료전능과정중제사통도적존재(CO(a)+NO(X)→CO(X)+NO(b)).저일통도적발현해석료전인측량도적재CO(a)여NO(X)팽당전능과정중CO(a)적졸멸속솔원대우NO(A,B)생성속솔적실험결과,병진일보증실료저일"경전"E-E전능체계위전자교환궤리적전능관점.
Under single-collision conditions, a beam of metastable molecules CO(a,ν′) 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 △v=+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,ν′=0)(6.01 eV) was not enough to excite NO(X) to NO(b,ν′=4,5)(△E>6.11 eV). So, what was in act in the energy transfer was the vibrational excitation of CO(a,ν′>0), and the higher the vibrational excitation of CO(a,ν′) 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.