Adiabaticity of potential surfaces in elementary reactions

1. 光解过程电位表面绝热用激光多光子电离技术和激光诱导荧光技术检测了分子光解过程中产生的原子碎片。研究了离解过程中键断裂过程中势能曲线之间的非绝热跃迁，这种跃迁会影响碎片原子的电子态和动态。研究了Cl_2、ICl、H_3O_2、SiH_4、乙烯氯化物和O_3的光解过程。通过观察反应产物的初生平动态和内部态，研究了O（2P^<4\1>D）、S（3P^<4\1>D）、H（ls ^2S）和Xe（6p）等活性原子与其他分子的碰撞反应。利用光解过程作为活性原子反应物的来源，研究了单次碰撞下的产物状态，从而确定了产物的能量，测量了产物速度的角分布。根据测得的多普勒谱计算了反应产物的平动能。通过测量产物原子的精细结构支化比和产物分子的反振动态，研究了反应电位曲线的绝热性。研究了以下反应：(1)O(^1D) + H_2， D_3和HD， (2) O(^1D) +烷烃，(3)O(^1D) + CH_3OH, (4) SO(^1D) + h_2d2和HD， (5) S(^1D) +硫烷，(6)Ze(6p) + H_2和HD， (7) Xe(6p) + H_2O。

1. Adiabaticity of potential surface in photodissociation processesAtomic fragments produced in the photodissociation processes of molecules were detected with a laser multi-photon ionization technique and also with a laser-induced fluorescence technique. The non-adiabtic transitions between potential curves during the bnd break-up in the dissociation processes were investigated, which affect the electronic and translational states of the fragment atoms. The photodissociation processes of Cl_2, ICl, H_3O_2, SiH_4, Ethylene chlorides, and O_3 were studied.2. Adiabaticity of potential surfaces in reaction processesReactions of active atomic species, O(2P^<4\1>D), S(3P^<4\1>D), H(ls ^2S) and Xe(6p) with other molecules by collisions were investigated by observing the nascent translational and internal states of the reaction products. Since the photodissociation processes were used as sources of the active atom reactants and the products states were studied under single collision energies could be defined and angular distribution of the product velocities could be measured. The translational energies of the reaction products were calculated from the measured Doppler profiles. By measuring the fine structure branching ratios of product atoms and ro-vibronic states of product molecules, the adiabaticity of the potential curves in the reactions were investigated. The following reactions were studied, (1) O(^1D) + H_2, D_3 and HD, (2) O(^1D) + alkanes, (3) O(^1D) + CH_3OH, (4) SO(^1D) + H_2D_2 and HD, (5) S(^1D) + thiirane, (6) Ze(6p) + H_2 and HD, and (7) Xe(6p) + H_2O.