MOLECULAR EXCITED-STATES VERSUS COLLECTIVE ELECTRONIC OSCILLATIONS - OPTICAL-ABSORPTION PROBES OF NA4 AND NA8

被引：114

作者：

WANG, CRC

POLLACK, S

KAPPES, MM

机构：

[1] Department of Chemistry, Northwestern University, Evanston

来源：

CHEMICAL PHYSICS LETTERS | 1990年 / 166卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0009-2614(90)87044-R

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：

Photodepletion spectra were obtained for Na4 and Na8 over the wavelength range from 435 to 825 nm. For Na4, six band systems were found with cross sections from 0.25 to 3.39 Å2. They are assigned to various electronic transitions from rhombic ground state Na4 predicted in ab initio large-scale configuration interaction calculations. For Na8, we confirm the observation of a strong transition centered at 490 nm which has been interpreted in terms of a classical surface-plasma oscillation. The enhanced signal-to-noise available to us allows the first resolution of fine structure incompatible with this classical picture. © 1990.

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页码：26 / 31

页数：6

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