Angular distributions of photoelectrons and interatomic-Coulombic-decay electrons from helium dimers: Strong dependence on the internuclear distance
Angular distributions of photoelectrons and interatomic-Coulombic-decay electrons from helium dimers: Strong dependence on the internuclear distance
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DOI：
10.1103/physreva.82.063405
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发表时间：
2010-12-10
影响因子：
2.9
通讯作者：
Jahnke, T.
中科院分区：
文献类型：
--
作者：
Havermeier, T.;Kreidi, K.;Jahnke, T.
在本文中，我们证明了单光子的吸收可以使氦二聚体（He-2）的两个原子单电离：一个原子同时激发电离，然后通过原子间库仑衰变去激发，导致二聚体的两个原子中的每一个原子都射出一个电子。利用冷靶反冲离子动量谱技术（COLTRIMS），我们得到了这些电子在实验室框架和分子框架中的角分布。我们观察到这些分布在离子动能释放的不同区域有明显的变化。
In the present paper, we show that the absorption of a single photon can singly ionize both atoms of a helium dimer (He-2): ionization with simultaneous excitation of one atom followed by de-excitation via interatomic Coulombic decay leads to the ejection of an electron from each of the the two atoms of the dimer. Using the Cold Target Recoil Ion Momentum Spectroscopy technique (COLTRIMS), we obtained angular distributions of these electrons in the laboratory frame and the molecular frame. We observe a pronounced variation of these distributions for different regions of kinetic-energy releases of the ions.