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Table 1

Physical conditions to produce HAC samples in a gas pressure equal to 4.5 Torr.

Before UV irradiation After UV irradiation


S#1 ρa Atmosphere Fl kCH H/C sp3/sp2 Eg UV dose H/C sp3/sp2 Eg
(10-7g cm-2) (He: H2) (W cm-2) (cm2 g-1) (eV) (eV cm-2) (eV)

S1 116.25 50:30 2 × 108 45 0.60 0.40 1.1 .... .... .... ....
S2 41.85 50:15 2 × 108 .... .... .... 1.2 .... .... .... ....
S3 48.05 50:30 2 × 108 .... .... .... 1.27 5.2 × 1022 .... .... ....
S3(grid) .... 50:30 2 × 108 .... .... .... .... 3.0 × 1022 .... .... ....
1.0 × 1023 .... .... ....
S4 58.9 50:30 2 × 108 49 0.62 0.43 1.21 2.9 × 1022 .... .... ....
6.3 × 1022 .... .... ....
1.0 × 1023 0.43 0.19 1.37
S5 51.15 50:15 2 × 108 .... .... .... 1.32 .... .... .... ....
S6 38.75 50:15 2 × 108 .... .... .... 1.42 .... .... .... ....
S7 38.75 50:30 2 × 108 .... .... .... 1.45 1.0 × 1023 .... .... ....
S8 34.1 50:30 2 × 108 .... .... .... 1.33 6.3 × 1022 .... .... 1.67
S9 57.35 50:15 2 × 108 .... .... .... 1.5 .... .... .... ....
S10 46.5 50:30 2 × 108 .... .... .... 1.5 .... .... .... ....
S11 89.9 50:30 2 × 108 47 0.61 0.41 1.55 .... .... .... ....

S14 100.75 90:20 2.8 × 1010 66 0.70 0.55 1.65 .... .... .... ....
S15 124.0 150:12 2.0 × 1010 92 0.78 0.70 1.7 .... .... .... ....
S16 62.0 80:20 2.1 × 1010 99 0.79 0.74 1.7 .... .... .... ....
S17 62.0 100:30 2.1 × 1010 47 0.61 0.42 1.72 .... .... .... ....
S18 100.75 90:20 2.8 × 1010 85 0.76 0.67 1.8 .... .... .... ....
S19 100.75 90:20 2.8 × 1010 .... .... .... 1.8 .... .... .... ....
S20 93.0 80:20 1.4 × 1010 65 0.69 0.55 1.8 .... .... .... ....
S21 62.0 90:10 2.0 × 1010 .... .... .... 1.75 6.3 × 1022 .... .... 1.68
S22 116.25 90:20 2.8 × 1010 89 0.77 0.69 1.82 .... .... .... ....
S23 38.75 50:20 3.0 × 1010 .... .... .... 2.15 1.0 × 1023 .... .... 1.6
S24 186.0 90:20 2.8 × 1010 113 0.82 0.80 .... 2.1 × 1022 0.70 0.56 ....
S26 141.05 50:20 3.1 × 1010 81 0.75 0.65 .... 1.0 × 1023 0.37 0.14 ....

Notes.

(1)

S8, S23, and S24 are deposited on a CaF2 substrate, while S26 is deposited on a KBr substrate. Other samples except S3(grid) are deposited on a SiO2 substrate. S1, S2, S3, S3(grid), S7, S22, S24 and S26 are used for HRTEM images, and for UV irradiation S1, S3(grid), S4, S7, S8, S21, S23, S24, and S26 are used. In order to follow the evolution of the small rise which appears mostly in the FUV band, S1-S11 and S14-S23 are used.

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