Search For Dynamical Resonance In Chemical Reaction

研制了一种新的二维离子成像装置，并通过光解离实验对其性能进行了检验。该装置的空间分辨率优于数百微米，这为我们提供了约10%的速度分辨率和约5度的角分辨率。详细研究了NO_（2，3），N_（2，3）O，OCS，氯乙烯，溴乙烯和乙炔的光解动力学.进一步发展了研究分子和原子产物角动量极化的实验和理论方法。该方法最终将用于非弹性和反应散射的多重微分截面测量。利用H_2S和HI的光解产生了脉冲氢原子束，其持续时间为35ns。氢束与D_2、Ar等靶束交叉，但散射氢原子的观察受到来自腔室中残余气体的背景氢信号的干扰。烘烤腔室，并且还添加液氮阱以抽气至10 μ <-8>Torr，但似乎需要更高的真空。真空系统的改造仍在进行中。虽然该研究项目的最终目标尚未实现，但本研究为观察化学反应中的动力学共振现象建立了新的理论和实验方法。

Two-dimensional ion imaging apparatus has been newly constructed, and its performance has been examined by photodissociation experiments. The spatial resolution of the apparatus was found to be better than hundreds of microns, which provides us the speed resolution of about 10% and the angular resolution of about 5 degree. Photodissociation dynamics of NO_<2, >, N_<2, >O,OCS,Chlorethylenes, Vinylbromide, and acetylene has been investigated in detail. The experimental and theoretical methods have been further developed to investigate polarization of angular momentum in molecular and atomic products. The method will be eventually used to measure multiply differential cross section in inelastic and reactive scattering. The pulsed hydrogen atomic beam has been generated by the photodissociation of H_2S and HI.The duration of this hydrogen beam has been found to be 35 ns. The hydrogen beam was crossed with target beam of (D_2, Ar etc.), but the observation of scattered hydrogen atoms was interfered by background hydrogen signal coming from residual gas in the chamber. The chamber was baked and also liquid nitrogen trap was added to pump down to 10^<-8> Torr, but higher vacuum seems necessary. The modification of the vacuum system is still in progress. Although the ultimate goal of the research project has not been achieved at this point, the present research has established the new theoretical and experimental method to observe dynamical resonance in chemical reaction.