COLLECTIVE ELECTRONIC EXCITATIONS AND THEIR DAMPING IN SMALL ALKALI CLUSTERS

被引：20

作者：

WANG, Y

LEWENKOPF, C

TOMANEK, D

BERTSCH, G

SAITO, S

机构：

[1] MICHIGAN STATE UNIV, CTR FUNDAMENTAL MAT RES, E LANSING, MI 48824 USA

[2] MICHIGAN STATE UNIV, NATL SUPERCONDUCTING CYCLOTRON LAB, E LANSING, MI 48824 USA

[3] NEC CORP LTD, FUNDAMENTAL RES LABS, TSUKUBA, IBARAKI 305, JAPAN

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 205卷 / 06期

关键词：

D O I：

10.1016/0009-2614(93)80007-C

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We calculate collective electronic excitations and their damping in small Na(n) and Li(n) clusters. The ground state properties of these systems are described using the local density approximation, and the electronic excitations by the random phase approximation. The collective excitations in the first two closed-shell clusters with n = 2, 8 atoms are discussed in detail. We find that the coupling of electronic levels to vibrational degrees of freedom accounts quantitatively for the observed width of the collective electronic excitations in alkali dimers. The origin of the analogous line broadening in Na8 is presently unresolved.

引用

页码：521 / 528

页数：8

共 37 条

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