Reevaluation of the use of photoelectron angular distributions as a probe of dynamical processes: strong dependence of such distributions from s1 paradifluorobenzene on photoelectron kinetic energy.
Reevaluation of the use of photoelectron angular distributions as a probe of dynamical processes: strong dependence of such distributions from s1 paradifluorobenzene on photoelectron kinetic energy.
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DOI：
10.1103/physrevlett.91.263002
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发表时间：
2003-12
影响因子：
8.6
通讯作者：
S. Bellm;K. L. Reid
中科院分区：
文献类型：
--
作者：
S. Bellm;K. L. Reid
光电子角分布（PAD）已被测量以下的S1起源带在对二氟苯使用范围内的电离波长和解析的离子振动状态的激发。的PAD显示出显着的灵敏度的光电子动能超过至少1 eV的能量范围内从阈值，几乎没有任何准备的中间状态对齐的敏感性。这对使用PAD的分子内动力学研究具有重要意义。我们认为，所观察到的行为是由连续体中的形状共振引起的。
Photoelectron angular distributions (PADs) have been measured following the excitation of the S1 origin band in paradifluorobenzene using a range of ionizing wavelengths and for resolved ion vibrational states. The PADs show a dramatic sensitivity to the photoelectron kinetic energy over an energy range of at least 1 eV from threshold, and almost no sensitivity to any prepared intermediate state alignment. This has important consequences for those studies of intramolecular dynamics that use PADs. We suggest that the observed behavior is caused by a shape resonance in the continuum.