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arXiv astro-ph/0409727astro-ph
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大范围空气簇射在空气中产生的荧光光子

Fluorescence photons produced in air by extensive air showers

Vitor de Souza, Gustavo Medina-Tanco, Jeferson A. Ortiz

摘要:

空气荧光技术长期以来一直被用来探测大范围的空气簇射,并重建其几何形状和能量。在重建过程中,电子在空气中的荧光光子产额是最重要的。历史上,在簇射的重建中使用的荧光产额在所有能量下都近似于具有80 MeV的动能的电子的荧光产额,因为这些在簇射中是最丰富的。在本文中,我们计算的荧光产额考虑到电子的能谱的簇射引发的质子和铁核作为高度的函数。我们比较了我们的结果与以前的计算基础上的单能电子(80 MeV)和超过8%的差异被发现。最后,一个更现实的荧光产额在簇射能量重建的影响进行了讨论。

英文摘要:

The air fluorescence technique has long been used to detect extensive air showers and to reconstruct its geometry and energy. The fluorescence photon yield of an electron in air is of main importance in the reconstruction procedure. Historically, the fluorescence yield used in the reconstruction of the showers is approximated at all energies by that of an electron with kinetic energy of 80 MeV, because these are the most abundant in a shower. In this paper, we calculate the fluorescence yield taking into account the energy spectrum of electrons in showers initiated by proton and iron nuclei as a function of height. We compare our results with previous calculations based on mono energetic electrons (80 MeV) and a difference in excess of 8% is found. Finally, the influence of a more realistic fluorescence yield in the shower energy reconstruction is also discussed.

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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