添付一覧
この数値はNCRP Report No.147(2004)に基づく。
なお、ガラスの密度は2.56g/cm3である。
該当する値がない場合には、安全側に設定するか又は補間法により求めることができる。
表7 木材におけるエックス線の空気カーマ透過率
しゃへい厚(mm) |
使用管電圧(kV) |
|||||||
25 |
30 |
35 |
50 |
55 |
60 |
65 |
70 |
|
0 |
1.00E+00 |
1.00E+00 |
1.00E+00 |
1.00E+00 |
1.00E+00 |
1.00E+00 |
1.00E+00 |
1.00E+00 |
10 |
5.32E-01 |
5.59E-01 |
5.83E-01 |
8.83E-01 |
8.92E-01 |
9.01E-01 |
9.08E-01 |
9.13E-01 |
20 |
2.96E-01 |
3.30E-01 |
3.61E-01 |
7.81E-01 |
7.97E-01 |
8.13E-01 |
8.26E-01 |
8.35E-01 |
30 |
1.71E-01 |
2.03E-01 |
2.34E-01 |
6.92E-01 |
7.13E-01 |
7.34E-01 |
7.51E-01 |
7.63E-01 |
40 |
1.02E-01 |
1.29E-01 |
1.57E-01 |
6.14E-01 |
6.39E-01 |
6.63E-01 |
6.84E-01 |
6.98E-01 |
50 |
6.26E-02 |
8.42E-02 |
1.08E-01 |
5.46E-01 |
5.73E-01 |
6.00E-01 |
6.23E-01 |
6.39E-01 |
60 |
3.93E-02 |
5.63E-02 |
7.64E-02 |
4.86E-01 |
5.15E-01 |
5.43E-01 |
5.68E-01 |
5.85E-01 |
70 |
2.52E-02 |
3.84E-02 |
5.49E-02 |
4.34E-01 |
4.63E-01 |
4.92E-01 |
5.17E-01 |
5.35E-01 |
80 |
1.64E-02 |
2.67E-02 |
4.01E-02 |
3.87E-01 |
4.16E-01 |
4.46E-01 |
4.72E-01 |
4.90E-01 |
90 |
1.09E-02 |
1.88E-02 |
2.97E-02 |
3.45E-01 |
3.74E-01 |
4.04E-01 |
4.30E-01 |
4.49E-01 |
100 |
7.33E-03 |
1.34E-02 |
2.23E-02 |
3.09E-01 |
3.37E-01 |
3.66E-01 |
3.92E-01 |
4.11E-01 |
110 |
4.99E-03 |
9.64E-03 |
1.68E-02 |
2.76E-01 |
3.04E-01 |
3.32E-01 |
3.58E-01 |
3.77E-01 |
120 |
3.44E-03 |
7.01E-03 |
1.29E-02 |
2.47E-01 |
2.74E-01 |
3.02E-01 |
3.27E-01 |
3.46E-01 |
130 |
2.39E-03 |
5.15E-03 |
9.88E-03 |
2.21E-01 |
2.47E-01 |
2.74E-01 |
2.98E-01 |
3.17E-01 |
140 |
1.68E-03 |
3.81E-03 |
7.65E-03 |
1.98E-01 |
2.22E-01 |
2.48E-01 |
2.72E-01 |
2.90E-01 |
150 |
1.19E-03 |
2.84E-03 |
5.96E-03 |
1.77E-01 |
2.01E-01 |
2.26E-01 |
2.49E-01 |
2.66E-01 |
160 |
8.49E-04 |
2.13E-03 |
4.66E-03 |
1.59E-01 |
1.81E-01 |
2.05E-01 |
2.27E-01 |
2.44E-01 |
170 |
6.11E-04 |
1.60E-03 |
3.67E-03 |
1.42E-01 |
1.63E-01 |
1.86E-01 |
2.07E-01 |
2.24E-01 |
180 |
4.42E-04 |
1.21E-03 |
2.90E-03 |
1.27E-01 |
1.47E-01 |
1.69E-01 |
1.89E-01 |
2.06E-01 |
190 |
3.22E-04 |
9.23E-04 |
2.30E-03 |
1.14E-01 |
1.33E-01 |
1.54E-01 |
1.73E-01 |
1.89E-01 |
200 |
2.36E-04 |
7.06E-04 |
1.83E-03 |
1.02E-01 |
1.20E-01 |
1.40E-01 |
1.58E-01 |
1.73E-01 |
210 |
1.73E-04 |
5.41E-04 |
1.46E-03 |
9.19E-02 |
1.08E-01 |
1.27E-01 |
1.44E-01 |
1.59E-01 |
220 |
1.28E-04 |
4.17E-04 |
1.17E-03 |
8.24E-02 |
9.80E-02 |
1.15E-01 |
1.32E-01 |
1.46E-01 |
230 |
9.52E-05 |
3.22E-04 |
9.37E-04 |
7.40E-02 |
8.85E-02 |
1.05E-01 |
1.21E-01 |
1.34E-01 |
240 |
7.10E-05 |
2.49E-04 |
7.54E-04 |
6.64E-02 |
7.99E-02 |
9.52E-02 |
1.10E-01 |
1.23E-01 |
250 |
5.32E-05 |
1.94E-04 |
6.08E-04 |
5.95E-02 |
7.22E-02 |
8.65E-02 |
1.01E-01 |
1.12E-01 |
260 |
4.00E-05 |
1.51E-04 |
4.91E-04 |
5.34E-02 |
6.52E-02 |
7.86E-02 |
9.19E-02 |
1.03E-01 |
270 |
3.01E-05 |
1.18E-04 |
3.97E-04 |
4.80E-02 |
5.89E-02 |
7.15E-02 |
8.40E-02 |
9.47E-02 |
280 |
2.28E-05 |
9.20E-05 |
3.22E-04 |
4.30E-02 |
5.32E-02 |
6.50E-02 |
7.68E-02 |
8.70E-02 |
290 |
1.73E-05 |
7.21E-05 |
2.61E-04 |
3.86E-02 |
4.81E-02 |
5.90E-02 |
7.02E-02 |
7.98E-02 |
300 |
1.32E-05 |
5.66E-05 |
2.12E-04 |
3.47E-02 |
4.34E-02 |
5.37E-02 |
6.41E-02 |
7.33E-02 |
350 |
3.47E-06 |
1.73E-05 |
7.67E-05 |
2.02E-02 |
2.62E-02 |
3.33E-02 |
4.09E-02 |
4.77E-02 |
400 |
9.62E-07 |
5.42E-06 |
2.83E-05 |
1.18E-02 |
1.58E-02 |
2.07E-02 |
2.61E-02 |
3.11E-02 |
しゃへい厚(mm) |
使用管電圧(kV) |
|||||||
75 |
80 |
85 |
90 |
95 |
100 |
105 |
110 |
|
0 |
1.00E+00 |
1.00E+00 |
1.00E+00 |
1.00E+00 |
1.00E+00 |
1.00E+00 |
1.00E+00 |
1.00E+00 |
10 |
9.16E+01 |
9.16E+01 |
9.17E+01 |
9.17E+01 |
9.19E+01 |
9.22E+01 |
9.26E+01 |
9.31E+01 |
20 |
8.39E+01 |
8.40E+01 |
8.41E+01 |
8.43E+01 |
8.46E+01 |
8.51E+01 |
8.59E+01 |
8.68E+01 |
30 |
7.69E+01 |
7.71E+01 |
7.72E+01 |
7.74E+01 |
7.79E+01 |
7.86E+01 |
7.97E+01 |
8.09E+01 |
40 |
7.05E+01 |
7.08E+01 |
7.10E+01 |
7.12E+01 |
7.18E+01 |
7.26E+01 |
7.39E+01 |
7.54E+01 |
50 |
6.47E+01 |
6.50E+01 |
6.52E+01 |
6.56E+01 |
6.62E+01 |
6.72E+01 |
6.86E+01 |
7.03E+01 |
60 |
5.94E+01 |
5.98E+01 |
6.00E+01 |
6.04E+01 |
6.11E+01 |
6.22E+01 |
6.37E+01 |
6.56E+01 |
70 |
5.45E+01 |
5.49E+01 |
5.52E+01 |
5.57E+01 |
5.64E+01 |
5.76E+01 |
5.92E+01 |
6.12E+01 |
80 |
5.00E+01 |
5.05E+01 |
5.09E+01 |
5.13E+01 |
5.21E+01 |
5.33E+01 |
5.50E+01 |
5.71E+01 |
90 |
4.60E+01 |
4.65E+01 |
4.69E+01 |
4.74E+01 |
4.82E+01 |
4.94E+01 |
5.11E+01 |
5.32E+01 |
100 |
4.22E+01 |
4.28E+01 |
4.32E+01 |
4.37E+01 |
4.45E+01 |
4.58E+01 |
4.75E+01 |
4.97E+01 |
110 |
3.88E+01 |
3.94E+01 |
3.98E+01 |
4.04E+01 |
4.12E+01 |
4.25E+01 |
4.42E+01 |
4.63E+01 |
120 |
3.57E+01 |
3.63E+01 |
3.67E+01 |
3.73E+01 |
3.81E+01 |
3.94E+01 |
4.11E+01 |
4.32E+01 |
130 |
3.28E+01 |
3.34E+01 |
3.39E+01 |
3.45E+01 |
3.53E+01 |
3.65E+01 |
3.82E+01 |
4.03E+01 |
140 |
3.02E+01 |
3.08E+01 |
3.13E+01 |
3.19E+01 |
3.27E+01 |
3.39E+01 |
3.56E+01 |
3.76E+01 |
150 |
2.77E+01 |
2.84E+01 |
2.89E+01 |
2.95E+01 |
3.03E+01 |
3.15E+01 |
3.31E+01 |
3.51E+01 |
160 |
2.55E+01 |
2.62E+01 |
2.67E+01 |
2.72E+01 |
2.81E+01 |
2.92E+01 |
3.08E+01 |
3.28E+01 |
170 |
2.35E+01 |
2.41E+01 |
2.46E+01 |
2.52E+01 |
2.60E+01 |
2.71E+01 |
2.87E+01 |
3.06E+01 |
180 |
2.16E+01 |
2.22E+01 |
2.27E+01 |
2.33E+01 |
2.41E+01 |
2.52E+01 |
2.67E+01 |
2.85E+01 |
190 |
1.99E+01 |
2.05E+01 |
2.10E+01 |
2.16E+01 |
2.23E+01 |
2.34E+01 |
2.49E+01 |
2.66E+01 |
200 |
1.83E+01 |
1.89E+01 |
1.94E+01 |
2.00E+01 |
2.07E+01 |
2.17E+01 |
2.32E+01 |
2.48E+01 |
210 |
1.68E+01 |
1.74E+01 |
1.80E+01 |
1.85E+01 |
1.92E+01 |
2.02E+01 |
2.16E+01 |
2.32E+01 |
220 |
1.55E+01 |
1.61E+01 |
1.66E+01 |
1.71E+01 |
1.78E+01 |
1.88E+01 |
2.01E+01 |
2.16E+01 |
230 |
1.43E+01 |
1.49E+01 |
1.53E+01 |
1.59E+01 |
1.65E+01 |
1.75E+01 |
1.87E+01 |
2.02E+01 |
240 |
1.31E+01 |
1.37E+01 |
1.42E+01 |
1.47E+01 |
1.53E+01 |
1.62E+01 |
1.74E+01 |
1.88E+01 |
250 |
1.21E+01 |
1.26E+01 |
1.31E+01 |
1.36E+01 |
1.42E+01 |
1.51E+01 |
1.62E+01 |
1.76E+01 |
260 |
1.11E+01 |
1.17E+01 |
1.21E+01 |
1.26E+01 |
1.32E+01 |
1.40E+01 |
1.51E+01 |
1.64E+01 |
270 |
1.02E+01 |
1.08E+01 |
1.12E+01 |
1.17E+01 |
1.23E+01 |
1.30E+01 |
1.41E+01 |
1.53E+01 |
280 |
9.42E+02 |
9.95E+02 |
1.04E+01 |
1.08E+01 |
1.14E+01 |
1.21E+01 |
1.31E+01 |
1.43E+01 |
290 |
8.68E+02 |
9.18E+02 |
9.60E+02 |
1.00E+01 |
1.06E+01 |
1.13E+01 |
1.22E+01 |
1.33E+01 |
300 |
7.99E+02 |
8.48E+02 |
8.88E+02 |
9.30E+02 |
9.81E+02 |
1.05E+01 |
1.14E+01 |
1.24E+01 |
350 |
5.29E+02 |
5.69E+02 |
6.03E+02 |
6.36E+02 |
6.77E+02 |
7.28E+02 |
7.99E+02 |
8.80E+02 |
400 |
3.51E+02 |
3.83E+02 |
4.09E+02 |
4.36E+02 |
4.68E+02 |
5.06E+02 |
5.61E+02 |
6.22E+02 |