Table 3 Indirect and direct energy band gaps, Urbach's energy values for GAFCHROMIC EBT2-M films exposed to DC Oxygen plasma for different exposure time.
From: Response of the modified GAFCHROMIC EBT2 radiochromic film to DC glow discharge plasma
Texp (min) | Indirect Eg (eV) | Direct Eg (eV) | \({\text{U}}\) (eV) | \(\Delta {\text{U}}\) (eV) |
|---|---|---|---|---|
0 | 1.82 ± 0.01 | 1.90 ± 0.01 | 0.079 | 0.004 |
0.5 | 1.82 ± 0.01 | 1.90 ± 0.01 | 0.083 | 0.005 |
1 | 1.82 ± 0.01 | 1.90 ± 0.01 | 0.065 | 0.003 |
2 | 1.76 ± 0.01 | 1.88 ± 0.01 | 0.076 | 0.001 |
3 | 1.75 ± 0.01 | 1.88 ± 0.01 | 0.082 | 0.001 |
4 | 1.71 ± 0.01 | 1.85 ± 0.01 | 0.110 | 0.004 |
7 | 1.68 ± 0.01 | 1.84 ± 0.01 | 0.141 | 0.006 |
10 | 1.61 ± 0.01 | 1.81 ± 0.01 | 0.227 | 0.012 |
