C-1S PHOTOIONIZATION OF H2CO AND C2H4 - AN ANGLE-RESOLVED PHOTOELECTRON STUDY

被引：11

作者：

KILCOYNE, ALD

SCHMIDBAUER, M

KOCH, A

RANDALL, KJ

FELDHAUS, J

机构：

[1] Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-1000 Berlin 33

[2] Institut für Physikalische und Theoretische Chemie, Universität Bonn, 5300 Bonn

来源：

JOURNAL OF CHEMICAL PHYSICS | 1993年 / 98卷 / 09期

关键词：

D O I：

10.1063/1.464765

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 measured partial photoionization cross sections sigma asymmetry parameters beta of the C Is main line and the pi --> pi* shake-up satellites of 'the isoelectronic molecules formaldehyde and ethylene in the near threshold region. In all channels we observe a strong cross section enhancement and a decrease in the beta parameter due to a shape resonance in the continuum. For each molecule the variation of sigma and beta with photoelectron kinetic energy is nearly identical for main line and satellites indicating only relatively small modifications of the effective molecular potential induced by the additional pi --> pi* excitation. There are no indications of conjugate shake-up processes in either molecule.

引用

页码：6735 / 6741

页数：7

共 40 条

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