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arXiv 1504.00765hep-phnucl-thphysics.atom-ph
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原子场中高能电子的双韧致辐射

Double bremsstrahlung from high-energy electron in the atomic field

P. A. Krachkov, R. N. Lee, A. I. Milstein

摘要:

导出了高能电子在重原子电场中双韧致辐射的微分截面。这些结果是在原子场的精确描述下,通过对外场中的波函数和格林函数的准经典近似得到的。结果表明,对微分截面的库仑修正(精确结果与领先的玻恩近似结果之间的差异)对应于小的动量转移。对双韧致辐射微分截面的库仑修正累积在该因子中,该因子与单韧致辐射微分截面中的相应因子相一致。在动量转移较小的情况下,该因子对屏蔽参数非常敏感,而对谱的库仑修正具有普遍的形式。

英文摘要:

The differential cross section of double bremsstrahlung from high-energy electron in the electric field of heavy atoms is derived. The results are obtained with the exact account of the atomic field by means of the quasiclassical approximation to the wave functions and the Green's function in the external field. It is shown that the Coulomb corrections to the differential cross section (the difference between the exact result and the result obtained in the leading Born approximation) correspond to small momentum transfers. The Coulomb corrections to the differential cross section of double bremsstrahlung are accumulated in the factor, which coincides with the corresponding factor in the differential cross section of single bremsstrahlung. At small momentum transfer, this factor is very sensitive to the parameters of screening while the Coulomb corrections to the spectrum have the universal form.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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