宇宙射线元素群的能谱：KASCADE展开分析的更新
Energy Spectra of Elemental Groups of Cosmic Rays: Update on the KASCADE Unfolding Analysis
摘要：
KASCADE实验测量了由宇宙射线在所谓的膝盖周围的能量范围内引起的广泛的空气簇射。KASCADE的数据已被用于成分分析，表明在3-5 PeV处的膝关节是由轻元素光谱中的陡峭化引起的。由于应用的展开分析关键取决于模拟的空气淋浴，不同的高能强子相互作用模型（QGSJet和SIBYLL）被使用。结果表明，单个质量群的相对丰度对基础模型有很强的依赖性。在这次更新的分析中，我们在模拟中使用了不同的低能相互作用模型（FLUKA而不是GHEISHA）的展开方法。虽然所得到的单个质量群谱没有显着变化，但通过使用FLUKA模型，测量数据的整体描述得到了改善。此外，还对较大天顶角范围内的资料进行了分析。新的结果是完全一致的，也就是说，没有提示任何严重的问题，在应用展开分析方法的KASCADE数据。
英文摘要：
The KASCADE experiment measures extensive air showers induced by cosmic rays in the energy range around the so-called knee. The data of KASCADE have been used in a composition analysis showing the knee at 3-5 PeV to be caused by a steepening in the light-element spectra. Since the applied unfolding analysis depends crucially on simulations of air showers, different high energy hadronic interaction models (QGSJet and SIBYLL) were used. The results have shown a strong dependence of the relative abundance of the individual mass groups on the underlying model. In this update of the analysis we apply the unfolding method with a different low energy interaction model (FLUKA instead of GHEISHA) in the simulations. While the resulting individual mass group spectra do not change significantly, the overall description of the measured data improves by using the FLUKA model. In addition data in a larger range of zenith angle are analysed. The new results are completely consistent, i.e. there is no hint to any severe problem in applying the unfolding analysis method to KASCADE data.
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