Ratio of element to O as a function of the kinetic energy per nucleon. Top panel: C/O, Si/O and Fe/O without (IS, solid lines) or with (TOA, dashed lines) solar modulation. The destruction cross-section is indicated for each element. Bottom panel: comparison of the simple toy-model formula (thick solid lines) with the data (symbols): CREAM I and II (Ahn et al. 2008, 2009, 2010a,b), CRN (Swordy et al. 1990; Mueller et al. 1991), HEAO-3 (Engelmann et al. 1990), TRACER (Ave et al. 2008, 2009), and low-energy ACE data (George et al. 2009).
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