开发和评估PU@PbO/B4C复合物用于玛和中子辐射屏蔽
Mahdieh Mokhtari Dorostkar1, Akbar Abdi Saray2
1Department of Physics, Facility of Science, Urmia University, Urmia, Iran.
Scientific reports
|December 8, 2025
概括
一种新的聚氨复合物与碳化物 (B4C) 和氧化 (PbO) 显示出出色的双辐射屏蔽. 这种材料有效地减弱了马射线和中子,为各种应用提供了增强的保护.
科学领域:
- 材料科学 材料科学 材料科学
- 核工程 核工程是指核工程.
- 聚合物科学 聚合物科学
背景情况:
- 开发有效的辐射屏蔽材料对于核安全和医疗应用至关重要.
- 聚氨 (PU) 是一种多用途的聚合物,但其固有的辐射屏蔽性能有限.
- 将PU与高密度填充剂相结合,可以增强其衰减能力.
研究的目的:
- 调查用碳化物 (B4C) 和氧化物 (PbO) 装载的聚氨泡的双重辐射屏蔽性能.
- 评估复合材料对玛射线和中子的有效性,包括二次玛辐射.
- 用蒙特卡洛模拟来验证实验发现.
主要方法:
- 制造具有不同度B4C和PbO的聚氨复合材料.
- 使用137Cs马源和定制中子设置 (Am-Be源) 的实验评估.
- 蒙特卡洛模拟使用MCNP6和GEANT4进行验证和详细分析.
主要成果:
- 将5%的B4C/PbO填充剂添加到聚氨中,将线性玛衰减增加了80%以上,并将半值层减少了60%.
- 中子屏蔽显示线性衰减系数增加了20%,而5%填充剂的中子平均自由路径下降了17%.
- 使用5%的填充剂,二次马衰减提高了30%,证明了有效的双重功能.
结论:
- PbO/B4C-PU复合物表现出显著的玛和中子衰减特性.
- 实验和模拟结果证实了该材料作为双重用途辐射屏蔽的潜力.
- 这种复合材料在各种应用中为辐射保护提供了有前途的解决方案.
更多相关视频
相关概念视频
Nuclear Power
9.3K
Controlled nuclear fission reactions are used to generate electricity. Any nuclear reactor that produces power via the fission of uranium or plutonium by bombardment with neutrons has six components: nuclear fuel consisting of fissionable material, a nuclear moderator, a neutron source, control rods, reactor coolant, and a shield and containment system.
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
Nuclear Fuels
Nuclear fuel consists of a fissile isotope, such as uranium-235, which must be present in sufficient quantity to provide a...
9.3K
Radiation: Applications
1.7K
The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
The average...
1.7K
Biological Effects of Radiation
17.6K
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
17.6K
Radiation Pressure: Problem Solving
771
The radiation pressure applied by an electromagnetic wave on a perfectly absorbing surface equals the energy density of the wave. The wave's momentum also gets transferred to the surface when an electromagnetic wave is entirely absorbed by it. The rate at which momentum is transmitted to an absorbing surface perpendicular to the propagation direction equals the force on the surface.
The average value of the rate of momentum transfer divided by the absorbing area represents the average force...
The average value of the rate of momentum transfer divided by the absorbing area represents the average force...
771
Diamagnetic Shielding of Nuclei: Local Diamagnetic Current
1.4K
An applied magnetic field causes the electrons present in the molecule to circulate, setting up a local diamagnetic current within the molecule. The local diamagnetic current arising from circulating sigma-bonding electrons induces a magnetic field, Blocal that opposes the applied magnetic field, B0. The effective magnetic field experienced by these nuclei is given by the difference between the applied and local magnetic fields in a phenomenon called local diamagnetic shielding. Essentially,...
1.4K
Nuclear Transmutation
20.4K
Nuclear transmutation is the conversion of one nuclide into another. It can occur by the radioactive decay of a nucleus, or the reaction of a nucleus with another particle. The first manmade nucleus was produced in Ernest Rutherford’s laboratory in 1919 by a transmutation reaction, the bombardment of one type of nuclei with other nuclei or with neutrons. Rutherford bombarded nitrogen-14 atoms with high-speed α particles from a natural radioactive isotope of radium and observed...
20.4K


