کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5498981 | 1533483 | 2017 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A review of electron-nucleus bremsstrahlung cross sections between 1 and 10Â MeV
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کلمات کلیدی
AFFdDCsNFFsDCsQEDFSMDCstDCSPDEQuantum electrodynamics - الکترودینامیک کوانتومیProbability distribution function - عملکرد توزیع احتمالیPartial differential equation - معادله دیفرانسیل جزئیDouble differential cross section - مقطع دو جداره دیفرانسیلDifferential cross section - مقطع دیفرانسیلیsupplementary material - مواد تکمیلیMultiple scattering - پراکندگی چندگانهPdf - پی دی اف
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
تشعشع
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A review of electron-nucleus bremsstrahlung cross sections between 1 and 10Â MeV A review of electron-nucleus bremsstrahlung cross sections between 1 and 10Â MeV](/preview/png/5498981.png)
چکیده انگلیسی
More than 80 years have passed since the first calculations of electron-nucleus bremsstrahlung cross sections were published by Sommerfeld, for non-relativistic electrons, and, independently, by Sauter, Bethe and Heitler, and Racah, for relativistic electrons. The Bethe-Heitler expression, that is based on the first Born approximation and includes the screening of the Coulomb field of the nucleus by the atomic electrons, has proven to work well at moderately high energies where the Landau-Pomeranchuk-Migdal effect is negligible. We review the current theoretical and experimental status with a highlight on electrons with kinetic energies between 1 and 10Â MeV. The choice is motivated by the peculiar difficulties present in this energy region, where it is necessary to treat simultaneously the interaction with the Coulomb field beyond the first Born approximation and the effect of screening. A fully numerical approach within the S-matrix formalism has proven to be extremely difficult above a few MeV, because the number of partial waves needed for an accurate evaluation is prohibitively large. Here we focus on analytic results, including the more complex ones employing the Furry-Sommerfeld-Maue wave functions and taking into account the next-to-leading order, and discuss the advantages and limitations in light of the best available data. The influence of multiple scattering in the target is investigated under the actual experimental conditions. A comparison with the widely used cross section tabulations by Seltzer and Berger is also presented.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Radiation Physics and Chemistry - Volume 141, December 2017, Pages 312-338
Journal: Radiation Physics and Chemistry - Volume 141, December 2017, Pages 312-338
نویسندگان
A. Mangiarotti, M.N. Martins,