Core to valence transitions in methane

被引：1

作者：

Frigo, SP ^{[1
]}

Menzel, A ^{[1
]}

Caldwell, CD ^{[1
]}

机构：

[1] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 288卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0009-2614(98)00244-9

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 have identified and characterized 1a(1) core electron transitions to states involving the anti-bonding 2t(2) sigma* virtual orbital in methane. The 1t(2) autoionization branching ratio indicates that the excitations lie at the same energies as the Rydberg resonances observed in total absorption. The corresponding 1t(2) angular distribution parameter reflects coupling of electron and nuclear coordinates. Changes in the 1t(2) kinetic energy distribution are explained by nuclear motion during the core-hole lifetime due to repulsive potential energy surfaces. The data indicate that 1a(1) core-excited states involving the valence 2t(2) sigma* molecular orbital are split by the Jahn-Teller effect into bands which are much broader than any Rydberg features. These results illustrate the value of valence emission as a probe of resonant molecular core-excited states. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

页码：98 / 104

页数：7

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