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Table 1
Parameters for target and projectile materials.
| Projectile parameters | ||||
| Material | M1 | χ | ||
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| H | 1.0 | 1.0 | ||
| He | 4.0 | 0.1 | ||
| C | 12.0 | 10-4 | ||
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| Target parameters | ||||
| Material | U0 | K | ρ | XH |
|
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| a-C | 4 | 0.65 | 2.2 | 0 |
| a-C:H | 4 | –0.04 | 1.4 | 0.4 |
Notes. M1 is the mean atomic mass of the projectile (amu), χ the abundance, U0 the surface cohesion energy (eV), K a free parameter, ρ the density (g cm-3) and XH the atomic fraction of hydrogen in the particle.
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