DISSOCIATIVE IONIZATION OF CO BY 22.5-48.5 EV PHOTONS - KINETIC-ENERGY MEASUREMENTS OF FRAGMENT IONS BY COINCIDENCE TIME-OF-FLIGHT MASS-SPECTROMETRY

被引：22

作者：

MATHUR, D ^{[1
]}

ELAND, JHD ^{[1
]}

机构：

[1] UNIV OXFORD,PHYS CHEM LAB,OXFORD OX1 3QZ,ENGLAND

来源：

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES | 1992年 / 114卷 / 1-2期

关键词：

CO; DISSOCIATIVE IONIZATION; KINETIC ENERGY RELEASE; TIME OF FLIGHT; FRAGMENT IONS;

D O I：

10.1016/0168-1176(92)85026-V

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Coincidence time-of-flight mass spectra of C+ and O+ produced by dissociative ionisation of CO by monochromatised photons have been measured in the energy range 22.5-48.5 eV. Fragment ion peak shapes have been analysed to yield kinetic energy release (KER) distributions as a function of photon energy. In the energy region up to 29 eV, good agreement is obtained between the measured values of KER associated with C+ formation and those expected from recent ab initio calculations of the potential energy curves of excited states of CO+. Paucity of theoretical information on CO+ states which dissociate to C + O+ precludes detailed analysis of O+ peak shapes. C+ + O+ pair formation is observed in a photoion-photoion coincidence spectrum measured at a photon energy (40.8 eV) which lies below the energy of the lowest metastable state of CO2+.

引用

页码：123 / 136

页数：14

共 18 条

[1] PHOTOELECTRON-SPECTRUM AND RYDBERG TRANSITIONS OF CO [J].