کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1771549 | 1523391 | 2006 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The yield of air fluorescence induced by electrons
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
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چکیده انگلیسی
The fluorescence yield for dry air and pure nitrogen excited by electrons is calculated using a combination of well-established molecular properties and experimental data of the involved cross-sections. Particular attention has been paid to the role of secondary electrons from ionization processes. At high pressure and high energy, observed fluorescence turns out to be proportional to the ionization cross-section which follows the Born-Bethe law. Predictions on fluorescence yields in a very wide interval of electron energies (eV-GeV) and pressures (1 and 1013 h Pa) as expected from laboratory measurements are presented. Experimental results at energies over 1 MeV are in very good agreement with our calculations for pure nitrogen while discrepancies of about 20% are found for dry air, very likely associated to uncertainties in the available data on quenching cross-sections. The relationship between fluorescence emission, stopping power and deposited energy is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Astroparticle Physics - Volume 26, Issues 4â5, NovemberâDecember 2006, Pages 231-242
Journal: Astroparticle Physics - Volume 26, Issues 4â5, NovemberâDecember 2006, Pages 231-242
نویسندگان
F. Arqueros, F. Blanco, A. Castellanos, M. Ortiz, J. Rosado,