Analysis of the fluorescence emission from atmospheric nitrogen by electron excitation, and its application to fluorescence telescopes

被引：34

作者：

Arqueros, F. ^{[1
]}

Blanco, F. ^{[1
]}

Rosado, J. ^{[1
]}

机构：

[1] Univ Complutense Madrid, Dept Fis Atom Mol & Nucl, Fac Ciencias Fis, E-28040 Madrid, Spain

来源：

NEW JOURNAL OF PHYSICS | 2009年 / 11卷

关键词：

DIFFERENTIAL CROSS-SECTIONS; LOW-ENERGY ELECTRONS; 2ND POSITIVE BAND; AIR FLUORESCENCE; IMPACT EXCITATION; SECONDARY ELECTRONS; IONIZATION; YIELD; DEPENDENCE; GASES;

D O I：

10.1088/1367-2630/11/6/065011

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A microscopic analysis of the processes involved in the fluorescence emission of nitrogen molecules induced by electronic collisions is carried out for a large range of incident energies (eV to GeV) and pressures (Pa to atmospheric conditions). The contribution of secondary electrons to that fluorescence is calculated by means of detailed Monte Carlo simulations. For this purpose, a novel analytical approximation of the energy spectrum of secondary electrons is used. The results of the simulations are shown to be useful for the interpretation of available experimental data. For instance, they account for the pressure dependence of the fluorescence observed in laboratory experiments. The conditions under which emitted fluorescence is proportional to deposited energy are also studied. Finally, these calculations provide an absolute value of the fluorescence yield consistent with available experimental data.

引用

页数：29

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