Table 5 Simulated neutron fluence and Gd neutron capture reactions per Gy of absolute dose for the various charged particles investigated in this study. The last column is the Gd neutron capture rate relative to protons.
From: Neutron activation of gadolinium for ion therapy: a Monte Carlo study of charged particle beams
Particle 5 to 10 cm (SOBP) | Thermal neutron fluence (cm-2/Gy) | Total neutron fluence (cm-2 /Gy) | Gd neutron capture reactions (captures/Gy) | Normalized Gd neutron capture reactions (captures/Gy) |
|---|---|---|---|---|
Argon | 1.7 × 105 | 1.2 × 107 | 5.0 × 105 | 0.24 |
Silicon | 1.7 × 105 | 9.5 × 106 | 5.0 × 105 | 0.24 |
Neon | 2.2 × 105 | 1.1 × 107 | 6.5 × 105 | 0.30 |
Oxygen | 2.6 × 105 | 1.2 × 107 | 7.4 × 105 | 0.34 |
Nitrogen | 3.1 × 105 | 1.4 × 107 | 8.9 × 105 | 0.42 |
Carbon | 3.7 × 105 | 1.5 × 107 | 1.1 × 106 | 0.49 |
Helium | 1.3 × 106 | 3.3 × 107 | 3.7 × 106 | 1.7 |
Proton | 7.4 × 105 | 1.1 × 107 | 2.1 × 106 | 1.0 |
Antiproton | 1.4 × 107 | 2.8 × 108 | 3.7 × 107 | 18 |
Negative Pion | 2.9 × 107 | 6.9 × 108 | 8.3 × 107 | 39 |
10 to 15 cm (SOBP) | ||||
Carbon | 7.1 × 105 | 2.4 × 107 | 4.5 × 106 | 0.56 |
Helium | 2.1 × 106 | 4.7 × 107 | 1.1 × 107 | 1.7 |
Proton | 1.3 × 106 | 1.4 × 107 | 5.8 × 106 | 1.0 |
