nuclear reaction

简明释义

核反应

英英释义

例句

1.The energy produced by a nuclear reaction can be harnessed for electricity generation.

通过核反应产生的能量可以用于发电。

2.The nuclear reaction in a reactor produces heat that is used to generate steam.

反应堆中的核反应产生的热量用于产生蒸汽。

3.Scientists study nuclear reactions to better understand the forces that hold the atomic nucleus together.

科学家研究核反应以更好地理解维持原子核结合的力量。

4.A fusion nuclear reaction powers the sun, combining hydrogen atoms to form helium.

融合核反应为太阳提供能量，将氢原子结合形成氦。

5.In a nuclear reaction, the nucleus of an atom is altered, releasing energy.

在核反应中，原子的核被改变，从而释放出能量。

作文

Nuclear reactions are fundamental processes that occur in the universe, playing a crucial role in the production of energy and the formation of elements. A nuclear reaction is defined as a process in which two atomic nuclei collide, resulting in the transformation of the nuclei and the release or absorption of energy. These reactions can be classified into two main types: fusion and fission. In nuclear fusion, lighter nuclei combine to form a heavier nucleus, releasing a significant amount of energy in the process. This is the same reaction that powers the sun and other stars, where hydrogen nuclei fuse to create helium. On the other hand, nuclear fission involves the splitting of a heavy nucleus into smaller nuclei, accompanied by the release of energy. This process is utilized in nuclear power plants, where uranium or plutonium isotopes are split to generate electricity.The significance of nuclear reactions extends beyond energy production. They are also responsible for the creation of many elements in the universe. For instance, during supernova explosions, intense heat and pressure lead to various nuclear reactions that synthesize heavier elements from lighter ones. This stellar nucleosynthesis is essential for the formation of elements like carbon, oxygen, and iron, which are vital for life on Earth. Without these nuclear reactions, the universe would be a very different place, lacking the diversity of elements we observe today.Moreover, nuclear reactions have important applications in medicine. Nuclear medicine utilizes radioactive isotopes to diagnose and treat diseases. For example, positron emission tomography (PET) scans rely on nuclear reactions to produce images of metabolic processes in the body, helping doctors detect cancer and other conditions early. Additionally, certain nuclear reactions are employed in targeted radiation therapy, where high-energy radiation is used to destroy cancer cells while minimizing damage to surrounding healthy tissue.Despite their benefits, nuclear reactions also pose significant risks. The potential for catastrophic accidents, as seen in Chernobyl and Fukushima, raises concerns about the safety of nuclear energy. Moreover, the long-term storage of radioactive waste generated by nuclear reactions remains a critical challenge. Ensuring that this waste does not harm the environment or human health is paramount.In conclusion, nuclear reactions are powerful processes that shape the universe, contribute to energy production, and have numerous applications in science and medicine. Understanding these reactions is essential for harnessing their benefits while mitigating their risks. As we continue to explore the potential of nuclear reactions, it is vital to approach them with caution and responsibility, ensuring a safe and sustainable future for generations to come.

核反应是宇宙中发生的基本过程，在能量的产生和元素的形成中发挥着至关重要的作用。核反应定义为两个原子核碰撞的过程，导致核的转变以及能量的释放或吸收。这些反应可以分为两种主要类型：聚变和裂变。在核聚变中，较轻的核结合形成一个较重的核，并在此过程中释放出大量能量。这就是太阳和其他恒星的能量来源，其中氢核聚合形成氦核。另一方面，核裂变涉及将重核分裂成较小的核，并伴随能量的释放。这个过程被用于核电站，其中铀或钚同位素被分裂以产生电力。核反应的重要性不仅限于能源生产。它们也是宇宙中许多元素形成的原因。例如，在超新星爆炸期间，强烈的热和压力导致各种核反应，将较轻的元素合成更重的元素。这种恒星核合成对于碳、氧和铁等元素的形成至关重要，这些元素对地球上的生命至关重要。如果没有这些核反应，宇宙将是一个非常不同的地方，缺乏我们今天观察到的元素多样性。此外，核反应在医学上也有重要应用。核医学利用放射性同位素来诊断和治疗疾病。例如，正电子发射断层扫描（PET）依赖于核反应来产生身体代谢过程的图像，帮助医生及早发现癌症和其他疾病。此外，某些核反应被用于靶向放射治疗，其中高能辐射用于摧毁癌细胞，同时尽量减少对周围健康组织的损害。尽管有其好处，核反应也带来了重大风险。事故的潜在风险，如切尔诺贝利和福岛，令人担忧核能的安全性。此外，由于核反应产生的放射性废物的长期储存仍然是一个关键挑战。确保这些废物不会对环境或人类健康造成危害至关重要。总之，核反应是塑造宇宙、促进能源生产并在科学和医学中具有众多应用的强大过程。理解这些反应对于利用其优势而减轻其风险至关重要。随着我们继续探索核反应的潜力，以谨慎和负责任的态度对待它们至关重要，以确保为后代创造一个安全和可持续的未来。