Electron impact ionization of O2 and the interference effect from forward-backward asymmetry

被引：10

作者：

Chowdhury, Madhusree Roy ^{[1
]}

Tribedi, Lokesh C. ^{[1
]}

机构：

[1] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2017年 / 50卷 / 15期

关键词：

ionization; di-atomic molecule; Young type interference; electron emission; angular asymmetry; DOUBLE-SLIT; 2-CENTER INTERFERENCE; PHOTOIONIZATION; EMISSION; N-2; MOLECULES; IONS; H-2;

D O I：

10.1088/1361-6455/aa7a31

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Absolute double differential cross sections (DDCSs) of secondary electrons emitted from O-2 under the impact of 7 keV electrons were measured for different emission angles between 30 degrees and 145 degrees having energies from 1-600 eV. The forward-backward angular asymmetry was observed from angular distribution of the DDCS of secondary electrons. The asymmetry parameter, thus obtained from the DDCS of two complementary angles, showed a clear signature of interference oscillation. The Cohen-Fanomodel of Young type electron interference at a molecular double slit is found to provide a good fit to the observed oscillatory structures. The present observation is in qualitative agreement with the recent results obtained from photoionization.

引用

页数：6

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