Table 4. Calculated IMFP Values versus Energy Relative to the Bottom of the Conduction Band^a.

	IMFP (nm)
energy (eV)	liquid water	LiF	CaF2	Al2O3
10.0	10.2			19.7
11.0	7.64			11.1
12.2	5.95		17.0	7.49
13.5	4.78		10.2	5.47
14.9	3.94	8.61	7.08	4.20
16.4	3.31	5.83	5.32	3.36
18.2	2.83	4.33	4.14	2.76
20.1	2.45	3.41	3.33	2.30
22.2	2.14	2.78	2.76	1.95
24.5	1.89	2.31	2.34	1.68
27.1	1.69	1.91	2.01	1.46
30.0	1.53	1.62	1.74	1.29
33.1	1.39	1.40	1.53	1.15
36.6	1.28	1.24	1.35	1.04
40.4	1.20	1.12	1.22	0.942
44.7	1.13	1.02	1.12	0.858
49.4	1.08	0.941	1.05	0.777
54.6	1.04	0.837	0.990	0.705
60.3	1.01	0.759	0.941	0.651
66.7	0.996	0.713	0.901	0.618
73.7	0.989	0.690	0.870	0.599
81.5	0.990	0.678	0.848	0.588
90.0	0.998	0.674	0.828	0.583
99.5	1.01	0.676	0.810	0.585
109.9	1.04	0.684	0.797	0.591
121.5	1.07	0.697	0.793	0.602
134.3	1.10	0.714	0.799	0.618
148.4	1.15	0.736	0.814	0.637
164.0	1.20	0.760	0.836	0.661
181.3	1.26	0.788	0.865	0.689
200.3	1.32	0.821	0.900	0.720
221.4	1.40	0.858	0.941	0.755
244.7	1.48	0.900	0.987	0.794
270.4	1.57	0.947	1.04	0.837
298.9	1.67	1.00	1.10	0.884
330.3	1.78	1.06	1.16	0.935
365.0	1.90	1.12	1.24	0.992
403.4	2.04	1.20	1.32	1.05
445.9	2.18	1.28	1.40	1.12
492.7	2.34	1.36	1.50	1.20
544.6	2.52	1.46	1.61	1.28
601.8	2.70	1.57	1.72	1.37
665.1	2.91	1.68	1.85	1.46
735.1	3.14	1.81	1.99	1.57
812.4	3.38	1.94	2.14	1.69
897.8	3.65	2.09	2.30	1.81
992.3	3.94	2.26	2.48	1.95
1096.6	4.26	2.44	2.67	2.10
1212.0	4.61	2.63	2.88	2.27
1339.4	4.99	2.84	3.11	2.44
1480.3	5.40	3.07	3.36	2.64
1636.0	5.85	3.32	3.63	2.85
1808.0	6.34	3.60	3.93	3.09
1998.2	6.87	3.90	4.25	3.34
2208.3	7.45	4.22	4.60	3.61
2440.6	8.08	4.57	4.98	3.91
2697.3	8.77	4.96	5.40	4.24
2981.0	9.52	5.38	5.85	4.59
3294.5	10.3	5.83	6.34	4.98
3641.0	11.2	6.33	6.88	5.40
4023.9	12.2	6.87	7.46	5.86
4447.1	13.2	7.46	8.10	6.36
4914.8	14.4	8.10	8.79	6.90
5431.7	15.6	8.80	9.54	7.49
6002.9	17.0	9.55	10.4	8.13
6634.2	18.5	10.4	11.3	8.83
7332.0	20.1	11.3	12.2	9.59
8103.1	21.8	12.3	13.3	10.4
8955.3	23.7	13.3	14.4	11.3
9897.1	25.8	14.5	15.7	12.3
10938.0	28.1	15.7	17.0	13.4
12088.4	30.5	17.1	18.5	14.5
13359.7	33.2	18.6	20.1	15.8
14764.8	36.1	20.2	21.8	17.1
16317.6	39.2	21.9	23.7	18.6
18033.7	42.6	23.8	25.7	20.2
19930.4	46.2	25.8	27.9	21.9
22026.5	50.2	28.0	30.3	23.7
24343.0	54.5	30.4	32.8	25.8
26903.2	59.1	33.0	35.6	27.9
29732.6	64.1	35.7	38.6	30.3
32859.6	69.5	38.7	41.8	32.8
36315.5	75.2	41.9	45.2	35.5
40134.8	81.5	45.3	48.9	38.4
44355.9	88.1	49.0	52.9	41.5
49020.8	95.2	52.9	57.1	44.8
54176.4	103	57.1	61.7	48.4
59874.1	111	61.6	66.5	52.2
66171.2	119	66.4	71.6	56.2
73130.4	129	71.4	77.0	60.4
80821.6	138	76.7	82.7	64.9
89321.7	148	82.3	88.7	69.6
98715.8	159	88.1	95.0	74.6
109097.8	170	94.3	102	79.7
120571.7	181	101	108	85.1
133252.4	193	107	116	90.7
147266.6	206	114	123	96.5
162754.8	218	121	130	102
179871.9	231	128	138	108
198789.2	245	135	146	115
219696.0	258	143	154	121
242801.6	271	150	162	127
268337.3	285	158	170	133
296558.6	298	165	178	139
327747.9	311	172	185	145
362217.4	324	179	193	151
400312.2	336	186	200	157
432945.1	345	191	206	162

^aNote that, if desired, the scattering cross sections (σ) can be computed from the IMFP values (λ) using the formula λ^–1 = Nσ and the following values of N: (3.34,6.12,2.45,2.34) × 10²²/cm³ for liquid H₂O, LiF, CaF₂, and Al₂O₃ respectively.