Collision‐induced intersystem crossing of CH2 from ã 1A1 to X̃ 3B1: A case study of the mixed‐state model
Collision‐induced intersystem crossing of CH2 from ã 1A1 to X̃ 3B1: A case study of the mixed‐state model
复制标题
碰撞引起的 CH2 从 ã 1A1 到 X̃ 3B1：混合状态模型的案例研究
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
F. Temps
中科院分区：
文献类型：
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作者：
U. Bley;F. Temps
在混合态机制的框架内研究了亚甲基从α 1A 1第一激发态到X 3B 1基态电子态CH 2（α 1A 1）+M→ CH 2（X 3B 1）+M的碰撞诱导系间穿越（CIISC）的速率系数[参见，例如，K. F. Freed，在Potential Energy Surfaces中，由K.（Wiley，纽约，1980年）]。因此，整个电子弛豫被假设为通过a流形内的一系列旋转跃迁进行，并且允许从a到X流形的跃迁起源于a的“门”态，所述门态是由于与附近的X振转态的自旋-轨道耦合而包含一些三重态特征的状态。从现有的光谱数据中确定了扰动的a和扰动的X水平和相关的相互作用矩阵元素。通过CH 2（X）远红外激光磁共振（FIR-LMR）跃迁的碰撞增宽测量获得了旋转弛豫过程的速率系数。德...
The rate coefficients for collision‐induced intersystem crossing (CIISC) of methylene from the a 1A1 first excited to the X 3B1 ground electronic state, CH2 (a 1A1)+M→CH2 (X 3B1)+M, were investigated within the framework of the mixed‐state mechanism [see, e.g., K. F. Freed, in Potential Energy Surfaces, edited by K. P. Law (Wiley, New York, 1980)]. Accordingly, the overall electronic relaxation was assumed to proceed via a sequence of rotational transitions within the a manifold and allowed transitions from the a to the X manifold originating via ‘‘gate’’ states of a which are states that contain some triplet character due to spin–orbit coupling with nearby X rovibrational states. The perturbed a and perturbing X levels and relevant interaction matrix elements were identified from the available spectroscopic data. Rate coefficients for rotational relaxation processes were obtained from collision broadening measurements of CH2 (X) far‐infrared laser magnetic resonance (FIR‐LMR) transitions. Tak...