Table 2
Results of ion irradiation experiments obtained with the recombination model fits.
| Sample | Ion | E | S e | σ d | Af/Ai | V |
| (MeV) | (MeV/(mg/cm2)) | (cm2) | (Å3) | |||
|
|
||||||
| a-C:H 1 | H+ | 10 | 4.580 × 10-2 | <3.5 × 10-16 | – | – |
| a-C:H 1 | H+ | 10 | 4.580 × 10-2 | (0.3)1.9(5.6) × 10-17 | (0.02)0.66(0.82) | >22 |
| a-C:H 1 | He2+ | 20 | 3.207 × 10-1 | <5.3 × 10-15 | – | – |
| a-C:H 1 | H+ | 0.2 | 7.092 × 10-1 | (0.3)1.2(3.6) × 10-16 | (0.01)0.50(0.62) | >29 |
| a-C:H 1 | C6+ | 91 | 2.07 | (0.7)3.2(7.8) × 10-16 | (0.17)0.35(0.45) | (40)51(104) |
| a-C:H 1 | C5+ | 50 | 3.274 | (0.3)1.7(3.9) × 10-15 | (0.23)0.47(0.55) | (32)38(78) |
| a-C:H 1 | Si7+ | 85 | 15.91 | (0.6)1.0(1.5) × 10-14 | (0.21)0.23(0.25) | (73)79(83) |
| a-C:H 1 | Ni9+ | 100 | 46.98 | (1.2)6.8(15) × 10-14 | <0.37 | >49 |
| a-C:H 1 | I12+ | 160 | 89.33 | (0.3)4.1(12) × 10-14 | (0.01)0.10(0.18) | (98)184(1470) |
| a-C:H 2 | He2+ | 20 | 3.207 × 10-1 | <1.0 × 10-17 | – | – |
| a-C:H 2 | C6+ | 91 | 2.07 | (4.0)8.8(16) × 10-16 | (0.46)0.55(0.61) | (29)33(38) |
| a-C:H 2 | I12+ | 160 | 89.33 | (0.02)1.8(12) × 10-13 | (0.01)0.38(0.68) | (26)47(1220) |
| Soot | H+ | 10 | 4.109 × 10-2 | (0.001)2.2(6.1) × 10-16 | (0.00)0.65(0.67) | >27 |
| Soot | C5+ | 50 | 2.864 | (0.008)5.5(14) × 10-15 | (0.00)0.62(0.68) | >26 |
| Soot | Si7+ | 85 | 13.7 | (5.9)7.8(30) × 10-15 | (0.00)0.18(0.32) | >55 |
| Soot | Ni9+ | 100 | 39.35 | (0.02)8.3(23) × 10-14 | (0.00)0.35(0.40) | >45 |
Notes. The aliphatic C-H destruction cross section σd, the relative asymptotic optical depth Af/Ai, and the recombination volume V are given (see text for explanation). These values are determined from the C-H stretching modes at 3.4 μm. The extreme values of each parameters are given between parenthesis.
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