Experimental evidence for interatomic Coulombic decay in Ne clusters -: art. no. 203401
Experimental evidence for interatomic Coulombic decay in Ne clusters -: art. no. 203401
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DOI：
10.1103/physrevlett.90.203401
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发表时间：
2003-05-23
影响因子：
8.6
通讯作者：
Möller, T
中科院分区：
文献类型：
--
作者：
Marburger, S;Kugeler, O;Möller, T
光激发的Ne团簇的电子光谱显示在低动能，既不存在于Ne单体，也不低于内价2s阈值的光子能量的信号。这些发现是原子间库仑衰变（ICD）存在的有力证据，这是一种最近在理论上预测的机制[Phys. Rev. Lett. 79，4778（1997）]。在ICD中，弱键合系统中的内价空穴态可以由于能量转移到相邻原子而经历超快弛豫，然后从该相邻位点发射电子。
Electron spectra of photoexcited Ne clusters are shown to display a signal at low kinetic energies that is neither present in the Ne monomer nor at photon energies below the inner-valence 2s threshold. These findings are strong evidence for the existence of interatomic Coulombic decays (ICD), a mechanism that was recently predicted theoretically [Phys. Rev. Lett. 79, 4778 (1997)]. In ICD, an inner-valence hole state in a weakly bonded system can undergo ultrafast relaxation due to energy transfer to a neighboring atom, followed by electron emission from this neighboring site.