环氧丙烷爆燃转爆轰过程中产物C2的发射光谱

采用具有增强功能的光谱探测器增强型电荷耦合器件(Itensified charge coupled device，ICCD)和自行设计的光电转换器，应用激波管技术对环氧丙烷爆燃转爆轰过程的发射光谱进行了拍摄，探测器快门开启时间为2μs，在500-570nm之间进行了多次测量，由压力传感器监测的压力信号来判断爆燃转爆轰过程的重复性。实验结果表明：探测到了产物C2分子的发光光谱，它们可归属为斯旺(Swan)带的d^3∏g-a^3∏u跃迁中△v=-1.0的两个振动序列。各序列的带头分别为516．52nm，512．94nm，563．55nm，558．55nm，554．07nm，550．19nm和544．77nm。通过对所拍摄光谱的分析，推断中间产物C2是环氧丙烷爆燃转爆轰过程中的主要产物之一，并给出了C2自由基形成的几种可能的反应通道。

Emission Spectra of C2 in the Process of Deflagration To Detonation Transition of Epoxypropane

The process of deflagration to detonation transition (DDT) of epoxypropane is studied in the shock tube. The study aimed to obtain the spectra information about the intermediate products of epoxypropane after fast reaction. In the experiment, by using an advanced intensified CCD spectroscopic detector and self-made electrical single pulse trigger, emission spectra of C2 with bandheads 516.52 nm,512.94 nm, 563.55 nm,558.55 nm,554.07 nm,550.19 nm, and 544.77 nm have been detected in the DDT process of epoxypropane with exposure time of 2 μs. Two vibrational band sequences (Δν=-1，0) of d3∏g-a3∏u are identified. And the experiment is performed many times; from the pressure sign monitored by pressure sensors, it can be nearly confirmed the sameness of DDT in the 500～570 nm region. Furthermore, this experiment indicate that C2 radical is one of the main products of epoxypropane in the DDT process, and the several possible reaction passage are given, too.