threshold energy

简明释义

阈能

英英释义

例句

1.Understanding the threshold energy can help in designing more efficient solar cells.

理解阈值能量可以帮助设计更高效的太阳能电池。

2.The reaction only occurs when the input energy exceeds the threshold energy.

反应仅在输入能量超过阈值能量时发生。

3.In this experiment, we found that the threshold energy for electron emission was lower than expected.

在这个实验中，我们发现电子发射的阈值能量低于预期。

4.Scientists measured the threshold energy required to initiate the nuclear fusion process.

科学家测量了启动核聚变过程所需的阈值能量。

5.The threshold energy determines the minimum energy needed for a chemical reaction to occur.

该阈值能量决定了化学反应发生所需的最低能量。

作文

In the realm of physics and chemistry, the term threshold energy refers to the minimum amount of energy required to initiate a particular reaction or process. This concept is crucial in understanding various phenomena, from chemical reactions to nuclear processes. When particles collide, they must possess sufficient energy to overcome the barriers that prevent them from reacting. If the energy is below this critical level, known as threshold energy (阈能), the reaction will not occur. For instance, consider a simple chemical reaction such as the combustion of gasoline. For the gasoline molecules to react with oxygen and produce carbon dioxide and water, they need to be provided with enough energy, typically in the form of heat. The threshold energy (阈能) for this reaction is the energy necessary to break the bonds in the reactants, allowing the formation of new bonds in the products. If the heat supplied is insufficient, the molecules will not collide with enough energy to break these bonds, and the reaction will fail to proceed. Similarly, in nuclear physics, the concept of threshold energy (阈能) is vital when discussing reactions such as nuclear fission or fusion. For instance, in fusion reactions where atomic nuclei combine to form a heavier nucleus, the nuclei must overcome the electrostatic repulsion between them. This requires a significant amount of energy, which is termed the threshold energy (阈能). Without reaching this energy level, the nuclei will not collide with enough force to fuse, thus preventing the reaction from occurring. Understanding the threshold energy (阈能) is not only important in theoretical studies but also has practical implications in various fields. In the development of new materials, for example, researchers must consider the threshold energy (阈能) when designing catalysts that can lower the energy barrier for a reaction. By finding ways to reduce the threshold energy (阈能), scientists can create more efficient reactions that require less energy input, leading to more sustainable processes. Moreover, in the field of medicine, understanding the threshold energy (阈能) can help in the design of targeted therapies that rely on specific reactions at the cellular level. For instance, in cancer treatment, certain drugs may be designed to activate only when they reach a specific energy threshold within the body, minimizing side effects while maximizing therapeutic effects. In conclusion, the concept of threshold energy (阈能) is fundamental across various scientific disciplines. It represents the critical energy level needed for reactions to occur, whether in chemistry, nuclear physics, or practical applications in material science and medicine. By grasping the importance of threshold energy (阈能), we can better understand and manipulate the processes that govern our physical world, paving the way for advancements in technology and health.

在物理和化学领域，术语阈能指的是启动特定反应或过程所需的最小能量。这一概念对于理解各种现象至关重要，从化学反应到核过程。当粒子碰撞时，它们必须具备足够的能量来克服阻止它们反应的障碍。如果能量低于这一临界水平，即阈能，反应将不会发生。 例如，考虑一个简单的化学反应，如汽油的燃烧。为了使汽油分子与氧气反应并产生二氧化碳和水，它们需要提供足够的能量，通常以热的形式。该反应的阈能是打破反应物中键所需的能量，从而允许在产品中形成新键。如果提供的热量不足，分子将无法以足够的能量碰撞以打破这些键，反应将无法进行。 类似地，在核物理中，讨论核裂变或聚变等反应时，阈能的概念至关重要。例如，在原子核结合形成更重核的聚变反应中，核必须克服它们之间的静电排斥。这需要大量的能量，这被称为阈能。如果没有达到这个能量水平，核将无法以足够的力量碰撞以聚变，从而阻止反应的发生。 理解阈能不仅在理论研究中重要，而且在各个领域都有实际意义。在新材料的开发中，例如，研究人员必须考虑阈能，以设计能够降低反应能量障碍的催化剂。通过寻找降低阈能的方法，科学家可以创造出更高效的反应，减少能量输入，从而导致更可持续的过程。 此外，在医学领域，理解阈能有助于设计依赖于细胞水平特定反应的靶向疗法。例如，在癌症治疗中，某些药物可能被设计为仅在达到体内特定能量阈值时激活，从而最小化副作用，同时最大化治疗效果。 总之，阈能的概念在各个科学学科中都是基础。它代表了反应发生所需的关键能量水平，无论是在化学、核物理还是在材料科学和医学的实际应用中。通过掌握阈能的重要性，我们可以更好地理解和操控支配我们物理世界的过程，为技术和健康的进步铺平道路。