Design and fabrication of a Nano-based neutron shield for fast neutrons from medical linear accelerators in radiation therapy

Table 3 Transmission factor comparison for experimental nanoshields with Am-Be source

Nano Material Concentration	Samples thickness (cm)	Net silicone (I/I₀)
Net silicone	0.5	0.96 ± 0.002
	1	0.90 ± 0.003
	1.5	0.84 ± 0.005
	2	0.76 ± 0.009
	Samples thickness (cm)	Fe₃O₄(I/I₀)	B₄C (I/I₀)
10% Wt. nano material, 90%Wt. silicone	0.5	0.95 ± 0.002	0.95 ± 0.003
	1	0.89 ± 0.002	0.86 ± 0.01
	1.5	0.82 ± 0.006	0.79 ± 0.01
	2	0.75 ± 0.007	0.71 ± 0.007
20% Wt. nano material, 80%Wt. silicone	0.5	0.95 ± 0.002	0.92 ± 0.007
	1	0.87 ± 0.007	0.83 ± 0.005
	1.5	0.80 ± 0.009	0.75 ± 0.001
	2	0.74 ± 0.003	0.70 ± 0.01
30% Wt. nano material, 70%Wt. silicone	0.5	0.92 ± 0.006	0.89 ± 0.006
	1	0.85 ± 0.01	0.79 ± 0.005
	1.5	0.78 ± 0.003	0.70 ± 0.004
	2	0.71 ± 0.01	0.66 ± 0.02
Double layer (Fe₃O₄and B₄C)	2	I/I₀ = 0.62 ± 0.01

ISSN: 1748-717X