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首页> 外文期刊>The Journal of Chemical Physics >DYNAMICS OF RYDBERG STATES OF MOLECULES IN THE INTERMEDIATE REGIME - THE ROLE OF THE VIBRATIONS
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DYNAMICS OF RYDBERG STATES OF MOLECULES IN THE INTERMEDIATE REGIME - THE ROLE OF THE VIBRATIONS

机译：中间态分子里德伯态的动力学-振动的作用。

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The coupling of a Rydberg electron to the vibrational motion is discussed in the intermediate regime in which the orbital period is long on the scale of the vibrational motion but is still considerably faster than the rotation of the core. Two dimensionless variables characterize the dynamics: the ratio of time scales and the action exchanged between the electron and the core, per one revolution. The classical dynamics are reduced to a map which provides a realistic approximation in the limit when the action exchanged is larger than h. There are two distinguishable time regimes, that of prompt processes where the corresponding spectrum is so broad that individual Rydberg states cannot be resolved and a much slower process, where the electron revolves many times around the core before it ionizes. The overall spectrum is that of a Rydberg series, where the lines are broadened by (the delayed) vibrational autoionization superimposed on a broad background. The semiclassical dynamics is quantitatively more accurate in the typical situation when the action exchanged is comparable or smaller than h. Explicit analytical expressions are obtained for the width for vibrational autoionization including for the case when resonances are possible. The presence of resonances is evident in Rydberg lines which are broader. For low Rydberg states the present approach recovers the Herzberg-Jungen approximation in the weak coupling limit. (C) 1996 American Institute of Physics. [References: 86]
机译：在中间状态下讨论了里德堡电子与振动运动的耦合，在该中间状态下，轨道周期在振动运动的尺度上较长，但仍比铁心的旋转快得多。两个无量纲的变量表征了动力学：每转一圈，时标之比和电子与核之间交换的作用。当交换的动作大于h时，经典动态简化为一个映射，该映射提供了逼真的极限值。有两种可区分的时间机制，即快速过程，相应的光谱是如此之宽，以至于无法分辨各个里德堡状态;而​​速度慢得多的过程，即电子在电离之前围绕核旋转了许多次。总体频谱是Rydberg序列的谱，其中谱线通过叠加在较宽背景上的（延迟的）振动自电离作用而加宽。当交换的动作与h相当或更小时，半古典动力学在典型情况下在定量上更准确。对于振动自电离的宽度（包括可能发生共振的情况），获得了明确的解析表达式。共振的存在在更宽泛的里德伯格谱系中是明显的。对于低里德伯格状态，本方法在弱耦合极限中恢复了Herzberg-Jungen近似。 （C）1996年美国物理研究所。 [参考：86]

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