分子反应动力学在星际化学，燃烧化学和能源化学中占据重要的地位，而量子态分辨的微分反应截面的测量是理解反应微观图像的最直接的途径。氧原子和氢分子的反应是燃烧化学中最重要的基元反应之一。过去几十年来，由于O(3P)+H2的反应存在很高的反应势垒，实验上很难进行研究。利用激光爆破法可以产生高平动能的O(3P)原子束，从而克服反应势垒。本课题申请拟采用激光爆破法结合高分辨的里德堡态氢原子时间飞行谱技术来研究O(3P)+H2的反应过程，测量不同碰撞能下该反应的微分散射截面，理解绝热和非绝热反应通道机理，为燃烧化学模型提供坚实的实验依据。

Moleuclar reaction dynamics is important in interstellar chemistry, combustion chemistry and energy chemistry. The straightforward way to understand the microscopic reaction picture is measuring the state-to-state differential cross section. The reaction bewteen oxygen atom and hydrogen molecule is one of the most important reaction in combustion chemistry. In the past thirty years, due to the very high reaction barrier, it's hard to investigate such reaction experimentally. The new technique can form high translational energy O(3P) beam by laser detonation, which can overcome the reaction barrier. The role of this application is studying the O(3P)+H2 reaction process by using high resolution Rydberg tagging H atom TOF spectroscopy combing with laser detonation source, and measuring the differential cross section at different collisional energies, understanding the adabatic and non-adabatic reaction mechanism. Such information is helpful for combustion chemistry model.