epithermal neutron activation analysis

简明释义

超热中子活化分析

英英释义

例句

1.The laboratory offers epithermal neutron activation analysis services for geological samples.

该实验室提供针对地质样本的热中子激活分析服务。

2.The researchers utilized epithermal neutron activation analysis to identify trace elements in the ancient artifacts.

研究人员利用热中子激活分析来识别古代文物中的微量元素。

3.Using epithermal neutron activation analysis, scientists can detect minute quantities of gold in ores.

利用热中子激活分析，科学家可以检测矿石中微量金的存在。

4.The accuracy of epithermal neutron activation analysis makes it a preferred method in nuclear research.

由于其准确性，热中子激活分析成为核研究中的首选方法。

5.In environmental studies, epithermal neutron activation analysis is essential for assessing soil contamination.

在环境研究中，热中子激活分析对于评估土壤污染至关重要。

作文

In the realm of analytical chemistry, various techniques are employed to determine the composition of materials. One such technique is epithermal neutron activation analysis, a powerful method used for the quantitative and qualitative analysis of elements within a sample. This technique relies on the interaction of neutrons with atomic nuclei, leading to the formation of radioactive isotopes. These isotopes can then be measured, allowing scientists to gain insights into the elemental makeup of the sample. epithermal neutron activation analysis is particularly advantageous because it can detect trace elements that are present in very low concentrations, making it invaluable in fields such as environmental science, geology, and archaeology.The process begins with the irradiation of the sample with neutrons. In epithermal neutron activation analysis, neutrons of intermediate energy levels are used, which enhances the likelihood of interactions with certain elements while minimizing the activation of others. This specificity is crucial for obtaining accurate results, especially when dealing with complex samples that may contain a wide variety of elements.After the sample has been irradiated, it undergoes a decay process where the radioactive isotopes formed emit gamma rays. These gamma rays are then detected using sophisticated instruments, allowing researchers to identify and quantify the elements present in the sample. The ability to analyze multiple elements simultaneously is one of the key strengths of epithermal neutron activation analysis, making it a time-efficient method for comprehensive analysis.Another significant advantage of this technique is its non-destructive nature. Unlike some other methods that may alter or destroy the sample during analysis, epithermal neutron activation analysis preserves the integrity of the material being tested. This is particularly important in fields like archaeology, where the preservation of artifacts is paramount. Researchers can analyze ancient pottery, bones, or metals without compromising their historical value.Moreover, epithermal neutron activation analysis is highly sensitive and can detect elements at parts per billion levels. This sensitivity is essential for applications in environmental monitoring, where detecting pollutants in soil or water can have significant implications for public health and safety. For instance, scientists can use this technique to identify heavy metals in contaminated sites, providing critical data for remediation efforts.Despite its many advantages, epithermal neutron activation analysis does have some limitations. The requirement for a neutron source means that access to this technique can be restricted to specialized laboratories equipped with nuclear reactors or particle accelerators. Additionally, the interpretation of data can be complex, requiring a thorough understanding of nuclear physics and analytical chemistry.In conclusion, epithermal neutron activation analysis is a versatile and powerful analytical technique that plays a vital role in many scientific disciplines. Its ability to detect trace elements with high sensitivity and specificity makes it an essential tool for researchers working in various fields. As technology continues to advance, the applications and accessibility of epithermal neutron activation analysis are likely to expand, further enhancing our understanding of the world around us.

在分析化学领域，各种技术被用于确定材料的成分。其中一种技术是中子活化分析，这是一种强大的方法，用于定量和定性分析样品中的元素。这种技术依赖于中子与原子核的相互作用，导致放射性同位素的形成。然后可以测量这些同位素，使科学家能够深入了解样品的元素组成。中子活化分析特别具有优势，因为它可以检测到非常低浓度的微量元素，这使其在环境科学、地质学和考古学等领域中不可或缺。该过程始于对样品进行中子辐照。在中子活化分析中，使用的是中等能量水平的中子，这增强了与某些元素相互作用的可能性，同时最小化其他元素的激活。这种特异性对于获得准确结果至关重要，尤其是在处理可能包含各种元素的复杂样品时。样品辐照后，它会经历一个衰变过程，形成的放射性同位素发射伽马射线。然后使用精密仪器检测这些伽马射线，使研究人员能够识别和量化样品中存在的元素。能够同时分析多个元素是中子活化分析的一大关键优势，使其成为全面分析的高效方法。这种技术的另一个显著优势是其非破坏性。与一些可能在分析过程中改变或破坏样品的方法不同，中子活化分析保留了被测试材料的完整性。这在考古学等领域尤为重要，因为文物的保护至关重要。研究人员可以分析古代陶器、骨骼或金属，而不会损害其历史价值。此外，中子活化分析的灵敏度极高，可以在十亿分之一的水平上检测元素。这种灵敏度对于环境监测中的应用至关重要，在这些应用中，检测土壤或水中的污染物可能对公众健康和安全产生重大影响。例如，科学家可以使用这种技术来识别受污染地点的重金属，为修复工作提供关键数据。尽管有许多优点，中子活化分析确实存在一些局限性。对中子源的需求意味着这种技术的获取可能仅限于配备核反应堆或粒子加速器的专业实验室。此外，数据的解释可能很复杂，需要对核物理和分析化学有深入的理解。总之，中子活化分析是一种多功能且强大的分析技术，在许多科学学科中发挥着重要作用。其以高灵敏度和特异性检测微量元素的能力使其成为各个领域研究人员的重要工具。随着技术的不断进步，中子活化分析的应用和可及性可能会进一步扩大，从而增强我们对周围世界的理解。