Fig. 4
Red solid line: ratio between the number of sputtered atoms in the 3D case (obtained by our simple model of collisional cascade for T = 107 K) and the single atoms ejected in the PAH case (considering only the nuclear interaction above threshold). Black dashed line: ratio between the geometrical cross-section of a planar PAH and that of a 3D a-C:H grain. The x axis shows the number of carbon atoms in the particle.
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