Table 1.
Constant coefficients related to Eq.1 for 5×5, 8×8, 10×10, 15×15, 20×20, 30×30 and 35×35 cm2 fields.
| L×L (cm2) | 6 MV | 18 MV | ||||||
|---|---|---|---|---|---|---|---|---|
| a | b | c | d | a | b | c | d | |
| 5×5 | 117.3 | -0.06 | -80.8 | -1.43 | 125.8 | -0.05 | -110.9 | -0.81 |
| 8×8 | 115.6 | -0.05 | -75.88 | -1.46 | 122 | -0.05 | -102.6 | -0.87 |
| 10×10 | 114.7 | -0.05 | -71.34 | -1.53 | 120.2 | -0.05 | -96.2 | -0.92 |
| 15×15 | 113.8 | -0.05 | -68.35 | -1.51 | 118.2 | -0.04 | -89.18 | -0.96 |
| 20×20 | 112.4 | -0.05 | -62.41 | -1.54 | 116.2 | -0.04 | -79.90 | -1.033 |
| 30×30 | 111.2 | -0.04 | -53.91 | -1.60 | 114.5 | -0.04 | -69.70 | -1.07 |
| 35×35 | 111.1 | -0.04 | -51.37 | -1.58 | 114.4 | -0.04 | -67.44 | -1.07 |