主 讲 人 ：牛家树 副教授
The mostsignificant feature in the cosmic-ray (CR) nuclei spectra is the spectralhardening at a few hundred GeV. It is important to know whether the hardening of different nuclei species is the same or not for constructing CR sources and propagation models. In this talk, I will present that the CR nuclei spectral hardening at a few hundred GeV has hybrid origins. In detail, the dominating factors of the spectral hardening for primary and secondary CR nuclei speciesare different: the former comes from the superposition of different kinds of CR sources, while the latter comes from the propagation process. Both factors influence all kinds of CR nuclei spectra, just with different weights.