Thickness/mm	X-ray shielding rate of W			X-ray shielding rate of Ag
Thickness/mm	Pb	W	W-Ni-Fe	Pb	W	W-Ni-Fe
0.1	0.7561	0.8124	0.7964	0.9568	0.9733	0.9690
0.2	0.8801	0.9182	0.9073	0.9795	0.9903	0.9877
0.3	0.9289	0.9621	0.9496	0.9885	0.9955	0.9946
0.4	0.9492	0.9760	0.9617	0.9927	0.9982	0.9968
0.5	0.9614	0.9860	0.9798	0.9946	0.9990	0.9983
0.6	0.9756	0.9940	0.9879	0.9965	0.9994	0.9993
0.7	0.9919	0.9940	0.9960	0.9967	0.9995	0.9996
0.8	0.9939	0.9960	0.9980	0.9984	0.9996	0.9996