Table 3.
Various correction factors as a function of energy and chamber
| Energy | NACP Plane parallel chamber | FC65-G Farmer chamber | ||||||
|---|---|---|---|---|---|---|---|---|
| kQ,Q0 | Ion recombination (ks) | Polarity effect (kpol) | Stopping power ratio (sw,air) | kQ,Q0 | Ion recombination (ks) | Polarity effect (kpol) | Stopping power ratio (sw,air) | |
| 6 MeV | 0.926 | 1.008 | 0.998 | 1.079 | — | — | — | — |
| 9 MeV | 0.911 | 1.009 | 0.999 | 1.050 | — | — | — | – |
| 12 MeV | 0.899 | 1.009 | 1.000 | 1.037 | 0.916 | 1.013 | 1.001 | 1.037 |
| 16 MeV | 0.888 | 1.001 | 1.003 | 1.010 | 0.911 | 1.012 | 1.000 | 1.010 |
| 20 MeV | 0.879 | 1.010 | 1.000 | 0.977 | 0.906 | 1.013 | 1.000 | 0.977 |