O（^3P）原子与CS2反应可见化学发光研究

Study on Visible Chemiluminescence from Reaction of O(3P) Atom with Carbon Disulfide

在交叉分子束装置上研究了基态氧原子O(3P)与二硫化碳反应的可见光区(380～500nm)化学发光,得到的光谱标识为SO2分子a珘3B1→X珟1A1自旋禁阻跃迁发射谱,实验中得到的上态主要是振动基态和弯曲模ν2激发的振动激发态,通过对不同压力情况下光谱的分析和反应通道的讨论,确认a珘3B1态的SO2来自于反应的多级过程.

Visible Chemiluminescence in the region of 380 similar to 500 nm was measured from the reaction of (O-3 P) atoms with carbon disulfide under various pressures using crossed molecular beam apparatus. The emission spectra were assigned to a B-3(1) --> X(1)A(1) transition of gaseous sulfur dioxide molecules. a B-3(1) state of sulfur dioxide is mainly composed of vibrational ground state and excited vibrational state of bending vibrational mode, vibrational band progressions in the lower state of bending modes and stretching modes were observed. The spectra under various pressures and the reaction mechanism were discussed. It was proposed that a B-3(1) state of sulfur dioxide was produced from multistage processes.