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arXiv 0911.4633astro-ph.HEastro-ph.CO
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踝关节周围宇宙辐射的化学成分及相关谱指数

The chemical composition of the cosmic radiation around the ankle and the related spectral indices

Antonio Codino, Francois Plouin

摘要:

最近对宇宙辐射的化学成分的一些测量表明,在脚踝周围的3 × 10 **18 eV的能量下,轻宇宙离子在膝盖前能量区域占主导地位。利用最近的宇宙辐射理论,它提供了一个定量的解释膝盖,第二膝盖和脚踝,宇宙辐射的化学成分明确计算给出个别离子光谱和离子分数从10 ** 12 eV到5 × 10 ** 19 eV。该计算假设了两个宇宙辐射的组成部分:一个起源于盘体积,另一个称为盘外分量,从盘边界穿过银河系到达太阳系。本文回顾了俄歇、HiRes、Agasa、Akeno、Fly'sEye、雅库茨克、HaverahPark和Volcano Ranch实验在半个世纪的实验中收集的10 ** 17 eV以上的数据,并与理论值进行了比较。计算和测量的<ln(A)>之间的比较显示出良好的整体一致性,除了HiRes实验之外,高达2 × 10 ** 19 eV,并且在10 ** 15 - 10 ** 17 eV的范围内与Kascade,East-top,Tunka和其他实验非常一致。该协议要求在10 ** 19 eV时,盘外分量的通量为1.8 x 10 ** 14粒子/ m ** 2 sr s eV **(1.5),是盘源产生的通量的两倍。

英文摘要:

Some recent measurements of the chemical composition of the cosmic radiation indicate that at the energy of 3 x 10 **18 eV, around the ankle, light cosmic ions dominate the spectrum as it occurs in the preknee energy region. Taking advantage of a recent theory of cosmic radiation which provides a quantitative explanation of the knee, the second knee and the ankle, the chemical composition of cosmic radiation is explicitly calculated giving individual ion spectra and ion fractions from 10 ** 12 eV to 5 x 10 ** 19 eV. The calculation assumes two components of the cosmic radiation feeding the ion flux at Earth: one originated in the disc volume and another one, called extradisc component, which from the disc boundaries traverses the Galaxy reaching the solar system. Data above 10 ** 17 eV collected during half century of experimentation by Auger, HiRes, Agasa, Akeno, Fly' s Eye, Yakutsk, Haverah Park and Volcano Ranch experiments are reviewed, examined and compared with the theoretical <ln(A)>. The comparison between computed and measured <ln(A)> exhibits a good global accord up to 2 x 10 ** 19 eV except with the HiRes experiment and an excellent agreement in the range 10 ** 15 - 10 ** 17 eV with Kascade, Eas-top, Tunka and other experiments. The accord requires a flux of the extradisc component of 1.8 x 10 ** 14 particles / m ** 2 sr s eV **(1.5) at 10 ** 19 eV, twice that generated by disc sources.

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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