Fig. 4
Boron-to-carbon ratio. Solid line: our present result for maximum reacceleration. Dashed line: best-fit result for pure diffusion model (Thoudam & Hörandel 2013). Model parameters used: η = 1.02, D0 = 9 × 1028 cm2 s-1, ρ0 = 3 GV, a = 0.33, qC = 2.24, qO = 2.26, s = 4.5, pc = 1 PeV/c, fC = 0.024%, fO = 0.025%, 
SNe Myr-1 kpc-2 and φ = 450 MV. Data: HEAO (Engelmann et al. 1990), CRN (Swordy et al. 1990), CREAM (Ahn et al. 2008), AMS-01 (Aguilar et al. 2010), ATIC (Panov et al. 2008; Orth et al. 1978; Simon et al. 1980; Webber et al. 1985), and TRACER (Obermeier et al. 2011).
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