排斥势中的阈值光剥离
Threshold photodetachment in a repulsive potential
摘要：
我们报告的第一个实验观察到一个新的阈值行为中观察到的5g部分通道的光剥离K-。它是由分离电子与剩余K（5g）原子之间的排斥极化相互作用产生的，具有很大的负偶极极化率。为了解释在K（5g）通道中的观测，我们已经开发了一个半经典模型，该模型预测了截面的指数能量依赖性。测量是用共线激光离子束和共振电离检测方案。
英文摘要：
We report on the first experimental observation of a new threshold behavior observed in the 5g partial channel in photodetachment of K-. It arises from the repulsive polarization interaction between the detached electron and the residual K(5g) atom, which has a large negative dipole polarizability. In order to account for the observation in the K(5g) channel, we have developed a semiclassical model that predicts an exponential energy dependence for the cross section. The measurements were made with collinear laser-ion beams and a resonance ionization detection scheme.
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