Spectra of Abundant Nuclei in Sources, According to the ATIC Experimentстатья
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Дата последнего поиска статьи во внешних источниках: 19 сентября 2015 г.
Аннотация: One of the most important results from the ATIC experiment is its collection of the energy spectra of abundant cosmicray nuclei: protons, He, C, O, Ne, Mg, Si, and Fe, measured in terms of energy per particle in the energy range of 50 GeV to tens of TeV. Starting with the spectra measured in the ATIC experiment, abundant nuclei spectra in sources are calculated using a number of propagation models. The results from comparing the spectra in sources of different nuclei are shown to depend only weakly on the propagation model. The spectrum of helium in sources is found to be harder than that of protons; this result is of high statistical significance and is virtually model independent. From helium up to iron nuclei, the steepness of the spectra in sources is seen to grow notably as the charge of nuclei rises.