Photoionization of metal clusters

被引：20

作者：

Koskinen, M ^{[1
]}

Manninen, M ^{[1
]}

机构：

[1] UNIV JYVASKYLA,DEPT PHYS,FIN-40351 JYVASKYLA,FINLAND

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 20期

关键词：

D O I：

10.1103/PhysRevB.54.14796

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The photoionization cross section of metal clusters is studied using simple theoretical models. In the case of small clusters, the plasmon is well below the photoionization threshold and the photoionization is dominated by simple independent-particle processes: One electron absorbs all the energy of the photon and immediately leaves the cluster. For large sodium clusters the photoionization efficiency curve is a result of a two-step process: First, the photon excites a plasmon and then the plasmon decays, either by emitting a photoelectron or by heating the cluster. A simple expression for the photoionization cross section near the threshold is derived.

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页码：14796 / 14806

页数：11

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