DIPOLE EXCITATIONS OF CLOSED-SHELL ALKALI-METAL CLUSTERS

被引：98

作者：

GUET, C ^{[1
]}

JOHNSON, WR ^{[1
]}

机构：

[1] UNIV NOTRE DAME,DEPT PHYS,NOTRE DAME,IN 46556

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.45.11283

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Excitation energies and associated oscillator strengths for dipole-excited states of alkali-metal clusters-treated as jellium spheres-are calculated in the random-phase approximation (RPA). Closed-shell systems with 8, 20, 34, 40, 58, and 92 delocalized electrons are considered. The ground state is described in the Hartree-Fock (HF) approximation. The excitation spectrum is determined by solving the RPA equations. Exchange contributions are taken into account completely. The theoretical oscillator-strength distribution is found to be very different for neutral and charged clusters. Static polarizabilities of the clusters are calculated and compared with experimental values and with other calculations.

引用

页码：11283 / 11287

页数：5

共 16 条

[1] SELF-CONSISTENT CALCULATION OF THE COLLECTIVE EXCITATIONS IN NEUTRAL AND CHARGED JELLIUM MICROSPHERES [J].