nuclear reaction

简明释义

核反应

英英释义

例句

1.Scientists study nuclear reactions to understand the processes that power the sun.

科学家研究核反应以了解驱动太阳的过程。

2.In a power plant, a controlled nuclear reaction generates electricity for thousands of homes.

在发电厂中，受控的核反应为数千个家庭提供电力。

3.A fusion nuclear reaction combines light nuclei to form heavier ones, releasing energy.

聚变核反应将轻核结合形成较重的核，释放能量。

4.The nuclear reaction that occurs in a reactor can be harnessed for medical purposes.

反应堆中发生的核反应可以用于医疗目的。

5.The energy produced by a nuclear reaction is millions of times greater than that from a chemical reaction.

通过核反应产生的能量是化学反应的数百万倍。

作文

Nuclear reactions are fundamental processes that involve the transformation of atomic nuclei. These reactions can release or absorb significant amounts of energy, making them essential in various applications, from power generation to medical treatments. A nuclear reaction occurs when the nucleus of an atom changes due to interactions with other particles. This can happen in several ways, including fusion and fission. In fusion, two light nuclei combine to form a heavier nucleus, releasing energy in the process. This is the same reaction that powers the sun and other stars. On the other hand, fission involves the splitting of a heavy nucleus into smaller fragments, which also releases energy. Both processes are harnessed for different purposes in today's world.The most common application of nuclear reactions is in nuclear power plants, where controlled fission reactions generate electricity. In these facilities, uranium or plutonium isotopes undergo fission when bombarded with neutrons, leading to a chain reaction that produces heat. This heat is used to convert water into steam, which drives turbines to generate electricity. The efficiency of this process is remarkable, as a small amount of nuclear fuel can produce a large amount of energy compared to fossil fuels. However, the management of nuclear waste and the risk of accidents remain significant challenges associated with nuclear power.In addition to power generation, nuclear reactions play a crucial role in medicine. Radioisotopes produced through nuclear reactions are used in diagnostic imaging and cancer treatment. For instance, positron emission tomography (PET) scans rely on radioactive tracers that emit gamma rays during decay, allowing doctors to visualize metabolic processes in the body. Furthermore, radiation therapy utilizes high-energy particles to target and destroy cancer cells, showcasing the beneficial applications of nuclear reactions in healthcare.Despite their advantages, nuclear reactions also raise ethical and safety concerns. The potential for catastrophic accidents, such as those at Chernobyl and Fukushima, highlights the risks associated with nuclear energy. Additionally, the proliferation of nuclear weapons poses a significant threat to global security. Countries with advanced nuclear technology must navigate complex political landscapes to prevent the misuse of nuclear reactions for destructive purposes.In conclusion, nuclear reactions are powerful processes that have transformed our world in many ways. From providing sustainable energy to advancing medical technologies, their impact is profound. However, it is imperative that we approach the use of nuclear reactions with caution, ensuring that safety measures are in place and that ethical considerations guide our actions. As we continue to harness the power of the atom, we must strive to balance innovation with responsibility, ensuring a safe and sustainable future for generations to come.

核反应是涉及原子核转化的基本过程。这些反应可以释放或吸收大量能量，使其在从发电到医疗治疗的各种应用中至关重要。当原子的核由于与其他粒子的相互作用而发生变化时，就会发生核反应。这可以通过多种方式发生，包括聚变和裂变。在聚变中，两个轻核结合形成一个更重的核，并释放出能量。这与太阳及其他恒星的能量来源相同。另一方面，裂变涉及将一个重核分裂成较小的碎片，这也释放出能量。这两种过程在当今世界被用于不同的目的。核反应最常见的应用是在核电站，在那里控制的裂变反应产生电力。在这些设施中，铀或钚同位素在被中子轰击时发生裂变，导致产生热量的链式反应。该热量被用于将水转化为蒸汽，驱动涡轮机发电。这一过程的效率是显著的，因为少量的核燃料可以产生比化石燃料更多的能量。然而，核废料的管理和事故风险仍然是与核电相关的重要挑战。除了发电，核反应在医学中也发挥着至关重要的作用。通过核反应产生的放射性同位素用于诊断成像和癌症治疗。例如，正电子发射断层扫描（PET）依赖于在衰变过程中发出伽马射线的放射性示踪剂，使医生能够可视化身体内的代谢过程。此外，放射治疗利用高能粒子针对并摧毁癌细胞，展示了核反应在医疗保健中的有益应用。尽管有其优势，核反应也引发了伦理和安全方面的担忧。切尔诺贝利和福岛等灾难性事故的潜在风险突显了核能相关的风险。此外，核武器的扩散对全球安全构成重大威胁。拥有先进核技术的国家必须在复杂的政治环境中导航，以防止核反应被用于破坏性目的。总之，核反应是强大的过程，在许多方面改变了我们的世界。从提供可持续能源到推动医学技术，它们的影响深远。然而，我们必须谨慎地看待核反应的使用，确保安全措施到位，并且道德考量指导我们的行动。随着我们继续利用原子的力量，我们必须努力在创新与责任之间取得平衡，为后代确保一个安全和可持续的未来。