電子線(xiàn)に対するタングステンシートの電離量の調(diào)査結(jié)果
電子線(xiàn)に対するタングステンシートの電離量の調(diào)査結(jié)果
| 測(cè)定場(chǎng)所 |
放射線(xiàn)治療室 |
| 試験條件 |
「外部放射線(xiàn)治療における吸収線(xiàn)量の標(biāo)準(zhǔn)測(cè)定法」（標(biāo)準(zhǔn)測(cè)定法01） |
| 使用機(jī)器 |
バリアン社製線(xiàn)形加速器 |
| 線(xiàn)量計(jì) |
東洋メディック製 RAMTEC1000Plus S/N287 |
| 検出器 |
電離箱 NACP S/N DFA0011205（平行平板型 H18/4/19 校正） |
| 電子線(xiàn) |
6MeV, 9MeV, 12MeV，15MeV, 18MeV（印加電圧-200V） |
| 照射條件 |
100MU DoseRate 300 正照射野100mm×100mm |
| ファントム |
水 |
| 遮蔽材サンプル |
タングステンシート（比重11.6, 厚さ＝1mm, 2mm, 3mm） |
| 比較材 |
鉛板1mm |
測(cè)定結(jié)果まとめ（遮蔽材が無(wú)い場(chǎng)合の電離量（nC）を100とする）
| 6MeV |
| 厚さmm |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
| Wシート |
100 |
6.538 |
0.863 |
0.724 |
0.671 |
0.631 |
0.592 |
0.542 |
0.547 |
0.496 |
0.421 |
| 鉛 |
100 |
9.324 |
0.854 |
0.658 |
0.648 |
0.594 |
0.579 |
0.53 |
0.51 |
0.461 |
0.417 |
| 9MeV |
| 厚さmm |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
| Wシート |
100 |
19.466 |
3.895 |
1.497 |
1.366 |
1.279 |
1.177 |
1.134 |
1.105 |
1.01 |
0.938 |
| 鉛 |
100 |
22.676 |
4.238 |
1.443 |
1.318 |
1.227 |
1.188 |
1.106 |
1.058 |
0.981 |
0.938 |
| 12MeV |
| MeV |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
| Wシート |
100 |
31.778 |
11.478 |
3.867 |
2.491 |
2.324 |
2.2 |
2.058 |
1.977 |
1.858 |
1.779 |
| 鉛 |
100 |
34.814 |
11.804 |
3.696 |
2.459 |
2.294 |
2.166 |
2.044 |
1.964 |
1.836 |
1.737 |
| 15MeV |
| 厚さmm |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
| Wシート |
100 |
41.275 |
18.979 |
8.258 |
4.327 |
3.803 |
3.569 |
3.345 |
3.226 |
3.04 |
2.835 |
| 鉛 |
100 |
44.402 |
19.007 |
7.693 |
4.442 |
3.696 |
3.535 |
3.322 |
3.162 |
2.996 |
2.854 |
| 18MeV |
| 厚さmm |
0 |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
| Wシート |
100 |
48.894 |
25.575 |
13.418 |
7.24 |
5.946 |
5.439 |
5.105 |
4.888 |
4.589 |
4.347 |
| 鉛 |
100 |
51.852 |
25.314 |
12.559 |
7.509 |
5.858 |
5.36 |
5.078 |
4.81 |
4.609 |
4.365 |
Collected By Hanns from www.tungsten-alloy.com
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