Energy Spectra and Charge States of H, He, and Heavy Ions Observed in the Earth's Magnetosheath and Magnetotail

H, He, and heavy ions of energies ≥ 0.12 MeV/charge were detected in the magnetotail and in the magnetosheath. It was found that their relative abundances were ∼9:1:4×${10}^{-2\mathrm{}}$, their differential energy spectra were $\sim \frac{1}{E^4}$, and their atomic electrons were almost completely stripped. These results led us to suggest that they were the low-energy "quiet-time" cosmic rays accelerated within the magnetotail and the magnetosheath to the observed energies.