An apparatus for studying momentum-resolved electron-impact dissociative and non-dissociative ionisation

被引：26

作者：

Sharma, V ^{[1
]}

Bapat, B ^{[1
]}

机构：

[1] Phys Res Lab, Ahmadabad 380009, Gujarat, India

来源：

EUROPEAN PHYSICAL JOURNAL D | 2006年 / 37卷 / 02期

关键词：

D O I：

10.1140/epjd/e2005-00267-5

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A spectrometer for recoil ion momentum measurements has been built for studying electron impact ionisation and dissociation of molecules. The apparatus is described in detail, highlighting its capabilities, as well as differences in design from the ones already in use elsewhere. Momentum spectra of ions resulting from 1300 eV electron impact on CO2 are presented. We observe a broad momentum distribution for the dissociative ionisation reaction leading to the formation of C+, and two momentum groups in the CO+ and O+ channel. By recording multiple ions arising from the same dissociative ionisation event, we also demonstrate the formation of fragment pairs O+:CO+, C+:O+, and O+:O+.

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页码：223 / 229

页数：7

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