Table 3.

Specifications of multi-layer radiation shields and aluminum.

Shield types	Total ionizing dose (a.u.)		Secondary particles (a.u.)	Total thickness (mm)
	Value	Percentage
Three-layer	$0.5130\times {10}^{-6}\pm 0.03\%$	32	$0.6129\times {10}^{-5}\pm 0.02\%$	1.983
Five-layer	$0.5986\times {10}^{-6}\pm 0.05\%$	38	$0.4071\times {10}^{-5}\pm 0.04\%$	1.985
Seven-layer	$0.4524\times {10}^{-6}\pm 0.06\%$	28	$0.4721\times {10}^{-5}\pm 0.03\%$	1.973
Aluminium	$1.55713\times {10}^{-6}\pm 0.03\%$	100	$0.4013\times {10}^{-5}\pm 0.02\%$	2