Table 4.

Mathematical constants from Figure 9, recommended filler contents at photon energy of 0.1–5 MeV (%change < 5%), and percentage of difference between NR (wood/NR) composites containing Bi₂O₃, Bi₂S₃, and Pb.

Composite	Photon Energy (MeV)	Coefficient		Recommended Content (phr)	µ at Recommended Content (cm−1)	Percentage Difference from Composites with Pb (%) *
		A	B
Pb/NR	0.1	1.652 × 104	−1.269	593	17.8	n/a **
	0.5	1.664 × 103	−0.941	478	0.52	n/a
	1	760.3	−0.839	398	0.23	n/a
	5	1.312 × 103	−0.909	458	0.14	n/a
Bi2O3/NR	0.1	1.894 × 104	−1.303	557	14.9	16.3
	0.5	1.839 × 103	−0.972	436	0.46	11.5
	1	869.4	−0.877	358	0.21	8.7
	5	1.439 × 103	−0.940	413	0.12	14.3
Bi2S3/NR	0.1	2.271 × 104	−1.346	521	12.8	28.4
	0.5	2.011 × 103	−1.007	386	0.39	24.6
	1	985.0	−0.918	316	0.18	20.1
	5	1.623 × 103	−0.980	365	0.11	24.8
Pb/wood/NR	0.1	1.389 × 104	−1.232	624	15.3	n/a
	0.5	1.199 × 103	−0.881	502	0.44	n/a
	1	535.9	−0.776	413	0.20	n/a
	5	0.937 × 103	−0.848	476	0.12	n/a
Bi2O3/wood/NR	0.1	1.553 × 104	−1.259	594	12.8	16.3
	0.5	1.303 × 103	−0.907	461	0.40	9.1
	1	600.5	−0.808	375	0.18	10.0
	5	1.008 × 103	−0.874	434	0.11	8.3
Bi2S3/wood/NR	0.1	1.812 × 104	−1.297	557	11.2	26.6
	0.5	1.402 × 103	−0.937	410	0.35	21.5
	1	670.5	−0.844	332	0.16	19.6
	5	1.121 × 103	−0.908	388	0.09	22.1

* Determined with respect to Pb/NR or Pb/wood/NR composites at the same photon energy. ** n/a: not applicable.