| 何星星,刘颖,潘喆,王亚淼,杨毅.金属材料对放射性核素的屏蔽性能研究[J].装备环境工程,2016,13(6):10-14. 何星星,刘颖,潘喆,王亚淼,杨毅.The Study on Shielding Properties of Metal Materials to the Radionuclides[J].Equipment Environmental Engineering,2016,13(6):10-14. |
| 金属材料对放射性核素的屏蔽性能研究 |
| The Study on Shielding Properties of Metal Materials to the Radionuclides |
| 投稿时间：2016-09-18 修订日期：2016-10-29 |
| DOI：10.7643/ issn.1672-9242.2016.06.003 |
| 中文关键词: 核反恐 屏蔽体 放射性核素 |
| 英文关键词:Nuclear terrorism Shield Radionuclides |
| 基金项目:国家自然基金(11205089)；中央高校基本科研业务费专项资金资助项目(30915011309) |
|
|
|
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 核与辐射恐怖袭击由于其成本相对较低,易投放等特点,越来越成为恐怖分子实施袭击的主要手段,核反恐和核应急已经成为全人类面临的一个重要的课题。为应对在核反恐以及核应急中屏蔽体对放射性核素的监测和识别干扰,对金属材料屏蔽体的放射性核素屏蔽性能进行了研究。方法 选用三种不同尺寸和材质的金属作为屏蔽体,探测它们对同一放射源的屏蔽作用。结果 发现屏蔽体对200keV以下的gamma谱具有较强的屏蔽作用,尤其对于几十keV的弱峰,经屏蔽体后几乎测不到。同一材质金属,其屏蔽性能与壁厚成正比,但是4mm铝筒的屏蔽效果比3mm钢筒的屏蔽效果有时候还差。结论 因此,在实际场景放射性核素探测识别中应充分考虑到不同材质和不同尺寸的屏蔽体对射线的吸收影响,从而快速检测和识别放射性核素。这对核反恐和核应急过程中的监测有特别的现实意义。 |
| 英文摘要: |
| Objective Nuclear and radiological terrorism has increasingly become a major means of terrorist attack because of its relatively low cost, easy to put on and so on, nuclear terrorism and nuclear emergency has become an important issue facing humanity. In order to deal with the interference of shield which impact on monitoring and identification of radionuclides during the nuclear terrorism and nuclear emergency, the shielding properties of the metal materials were studied. Methods Three different sizes and materials of metal are used as shield to detect the shielding effect of them on the same radioactive source. Results It is found that the shield body have strong shielding effects on the gamma spectrum below 200keV, especially for several tens of keV weak peaks and the shielding performance of the same kind of metal is proportional to the thickness. But sometimes the shielding effect of 4mm aluminum cylinder is worse than that of 3mm steel tube. Conclusion Therefore, we should fully consider the effects of different materials and different sizes of shield on the absorption of radiation in the actual scene of the radioactive nuclear detection and identification, thus detect and identify radionuclides rapidly. It is of special significance for the monitoring of nuclear terrorism and nuclear emergency. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
