Table 5.

Thermal neutron fluences obtained for each target volume and treatment plan, assuming a target volume average proton or heavy ion biological dose of 1 GyE.

Target Depth (mm)	Primary Ion	Thermal neutron fluence per GyE primary dose (n/cm2/GyE)
		Minimum	Mean	Maximum
100–150	Proton 12C	5.96 × 108	7.79 × 108	9.06 ×108
		2.86 × 108	3.34 × 108	3.60 × 108
140–190	Proton 12C	6.26 × 108	8.82 × 108	1.09 × 108
		3.17 × 108	4.08 × 108	4.68 × 108