A Novel and High-Precision Method for Calculating the γ-Ray Build-Up Factor for Multilayer Shields

Table 4

The results of MCNP, DNN, and Py-MLBUF, and the deviation at 3 MeV.

Media of shield	MCNP	DNN		Py-MLBUF
		DNN	Deviation:	L&J	Deviation: (%)
2Al + 1Fe	3.09	2.87	7.12	2.98	3.56
2Al + 2Fe	3.82	3.65	4.45	3.66	4.19
2Al + 3Fe	4.60	4.48	2.61	4.41	4.13
2Al + 4Fe	5.29	5.27	0.38	5.21	1.51
2Al + 5Fe	6.14	6.03	1.79	6.05	1.47
2Al + 6Fe	7.06	6.72	4.82	6.94	1.70
2Al + 1Pb	2.63	2.25	14.45	3.06	16.35
2Al + 2Pb	3.14	2.93	6.69	3.67	16.88
2Al + 3Pb	3.71	3.63	2.16	4.40	18.60
2Al + 4Pb	4.51	4.36	3.33	5.20	15.30
2Al + 5Pb	5.22	4.86	6.90	6.04	15.71
2Al + 6Pb	5.98	5.56	7.02	6.93	15.89
2Fe + 1Al	3.18	2.90	8.81	3.22	1.26
2Fe + 2Al	4.03	3.89	3.47	4.06	0.74
2Fe + 3Al	4.85	4.59	5.36	4.89	0.82
2Fe + 4Al	5.68	5.19	8.63	5.73	0.88
2Fe + 5Al	6.57	6.06	7.76	6.58	0.15
2Fe + 6Al	7.41	7.50	1.21	7.44	0.40
2Fe + 1Pb	2.61	2.13	18.39	3.02	15.71
2Fe + 2Pb	3.14	2.77	11.78	3.65	16.24
2Fe + 3Pb	3.73	3.50	6.17	4.39	17.69
2Fe + 4Pb	4.57	4.29	6.13	5.19	13.57
2Fe + 5Pb	5.32	5.09	4.32	6.03	13.35
2Fe + 6Pb	6.12	5.99	2.12	6.92	13.07
2Pb + 1Al	2.91	2.93	0.69	3.14	7.90
2Pb + 2Al	3.80	3.87	1.84	3.90	2.63
2Pb + 3Al	4.69	4.80	2.35	4.68	0.21
2Pb + 4Al	5.55	5.34	3.78	5.48	1.26
2Pb + 5Al	6.43	6.22	3.27	6.31	1.87
2Pb + 6Al	7.34	7.44	1.36	7.16	2.45
2Pb + 1Fe	2.81	2.58	8.19	3.12	11.03
2Pb + 2Fe	3.61	3.54	1.94	3.87	7.20
2Pb + 3Fe	4.47	4.49	0.45	4.65	4.03
2Pb + 4Fe	5.36	5.36	0.00	5.46	1.87
2Pb + 5Fe	6.32	6.24	1.27	6.31	0.16
2Pb + 6Fe	7.27	7.47	2.75	7.20	0.96