使用各种金属离子进行透明的X射线屏蔽解决方案
Ryoma Tokonami1, Minoru Osanai2, Masahiro Hosoda2,3
1Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Johnan, Yonezawa, Yamagata 992-8510, Japan.
ACS omega
|November 11, 2024
概括
透明,无的X射线屏蔽材料是使用酸盐离子开发的. 这些新型材料提供与传统颗粒分散相匹配或优越的屏蔽,同时保持高透明度.
科学领域:
- 材料科学 材料科学 材料科学
- 医学物理 医学物理
- 化学 化学 化学
背景情况:
- 传统的X射线屏蔽材料通常依赖于粒子分散,这可能会限制透明度.
- 了解与不同材料组成的X射线相互作用 (反射,散射,吸收) 对于开发先进屏蔽至关重要.
- 基于的材料带来了环境和健康问题,推动了无替代品的需求.
研究的目的:
- 开发新的,透明的,无的X射线屏蔽材料.
- 为了比较化金属离子与传统颗粒分散的X射线屏蔽效果.
- 研究材料组成,透明度和屏蔽性能之间的关系.
主要方法:
- 使用极性溶剂中的化离子制造透明的X射线屏蔽材料.
- 对金属离子溶液和含金属颗粒悬浮液之间的X射线屏蔽性能进行比较分析.
- 在特定波长和电压下测量X射线屏蔽性能和UV透射率.
主要成果:
- 溶解金属离子溶液的X射线屏蔽性能与颗粒悬浮相提并论或优于颗粒悬浮.
- 开发的材料具有很高的透明度,特别是在可见光光谱中.
- 化 (BaBr2) 溶液表现出色,达到92%的X射线屏蔽和~90%的紫外线透射率在400nm.
结论:
- 极性溶剂中的溶解金属离子代表了创造有效,透明和无X射线屏蔽材料的有希望的方法.
- 化因其溶解性和性能而成为一种高效的屏蔽剂.
- 这项研究为先进的X射线屏蔽应用铺平了道路,这些应用需要高保护和光学清晰度.
更多相关视频
相关概念视频
Masking and Demasking Agents
2.4K
EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
2.4K
Extraction: Advanced Methods
425
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
425
Nuclear Power
7.7K
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...
7.7K
Diamagnetic Shielding of Nuclei: Local Diamagnetic Current
841
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,...
841
Qualitative Analysis
22.0K
For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
For instance, group IV...
22.0K
Formation of Complex Ions
23.4K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.4K


