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We study the propagation and injection models of cosmic rays using the latestmeasurements of the Boron-to-Carbon ratio and fluxes of protons, Helium,Carbon, and Oxygen nuclei by the Alpha Magnetic Spectrometer and the AdvancedComposition Explorer at top of the Earth, and the Voyager spacecraft outsidethe heliosphere. The ACE data during the same time interval of the AMS-02 dataare extracted to minimize the complexity of the solar modulation effect. Wefind that the cosmic ray nucleus data favor a modified version of thediffusion-reacceleration scenario of the propagation. The diffusion coefficientis, however, required to increase moderately with decreasing rigidity at lowenergies, which has interesting implications on the particle and plasmainteraction in the Milky Way. We further find that the low rigidity ($<$ a fewGV) injection spectra are different for different compositions. The injectionspectra are softer for lighter nuclei. These results are expected to be helpfulin understanding the acceleration process of cosmic rays.

Implications on cosmic ray injection and propagation parameters from Voyager/ACE/AMS-02 nucleus data