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Panel A: Surface plots for frequency mean specific energy zF as a function of segment diameter dCyl and impact parameter b. Panels B and C: Cumulative dose distribution function (CDDF) of δ-ray ED to a given cylinder with (panel B) varying axis lengths dCyl (0.4, 1.2 and 3 μm) (dashed, solid, dot-dashed lines) at b = 100 μm; and (panel C) at varying b (10, 200 and 1,600 μm) (dashed, solid, dot-dashed lines) at dCyl = 1 μm.
