activation energy for fission

简明释义

裂变临界能量裂变的激发能量

英英释义

例句

1.Scientists are studying the activation energy for fission to improve the efficiency of nuclear reactors.

科学家们正在研究裂变的活化能以提高核反应堆的效率。

2.The process of nuclear fission requires a certain amount of energy to initiate, known as activation energy for fission.

核裂变的过程需要一定的能量来启动，这被称为裂变的活化能。

3.In experiments, researchers measured the activation energy for fission under various conditions.

在实验中，研究人员在不同条件下测量了裂变的活化能。

4.Reducing the activation energy for fission could lead to safer and more sustainable energy production.

降低裂变的活化能可能会导致更安全和更可持续的能源生产。

5.The activation energy for fission is a critical parameter in understanding nuclear reactions.

在理解核反应中，裂变的活化能是一个关键参数。

作文

The concept of activation energy for fission is crucial in the field of nuclear physics and chemistry. Fission refers to the process where a heavy nucleus splits into two or more lighter nuclei, along with the release of energy. This process is not spontaneous; rather, it requires a certain amount of energy to initiate it. This required energy is known as the activation energy for fission (裂变的活化能). Understanding this concept is essential for both theoretical studies and practical applications, such as in nuclear reactors and atomic bombs.In nuclear reactors, the activation energy for fission plays a significant role in controlling the chain reaction that occurs when fissile materials, like uranium-235 or plutonium-239, are used. When these materials are bombarded with neutrons, they may absorb a neutron and become unstable. However, for fission to occur, the nucleus must overcome the activation energy for fission (裂变的活化能), which is the energy barrier that must be surpassed for the nucleus to split. If the energy provided by the incoming neutron is sufficient, the nucleus will undergo fission, releasing a large amount of energy in the process.The activation energy for fission is influenced by several factors, including the type of fissile material, the energy of the incoming neutrons, and the temperature of the environment. For instance, thermal neutrons, which are slow-moving neutrons, are more likely to induce fission in certain materials compared to fast neutrons. This is why many nuclear reactors use moderators, such as water or graphite, to slow down the neutrons, thereby increasing the likelihood of fission occurring. By carefully managing the activation energy for fission (裂变的活化能), reactor operators can maintain a stable and controlled nuclear reaction, ensuring safety and efficiency.On the other hand, in the context of nuclear weapons, the activation energy for fission is a critical factor in achieving a rapid and uncontrolled fission reaction. In a nuclear bomb, a conventional explosive is used to compress a sub-critical mass of fissile material into a supercritical state. This sudden compression increases the density of the material and raises the chances of fission occurring, as it effectively lowers the activation energy for fission (裂变的活化能). The result is a massive release of energy in the form of an explosion.In conclusion, the activation energy for fission (裂变的活化能) is a fundamental concept that underpins the processes of nuclear fission. Its understanding is vital for harnessing nuclear energy safely and effectively, whether in power generation or military applications. As research in nuclear science continues to evolve, so too will our understanding of the factors influencing the activation energy for fission (裂变的活化能), paving the way for advancements in both energy production and nuclear technology.

裂变的活化能这一概念在核物理和化学领域至关重要。裂变是指重核分裂成两个或多个较轻的核，并伴随释放能量的过程。这个过程并不是自发的，而是需要一定量的能量来启动。这种所需的能量被称为裂变的活化能。理解这一概念对于理论研究和实际应用（如核反应堆和原子弹）都是必不可少的。在核反应堆中，裂变的活化能在控制链式反应中发挥着重要作用，当可裂变材料（如铀-235或钚-239）被使用时。当这些材料被中子轰击时，它们可能会吸收一个中子而变得不稳定。然而，为了使裂变发生，原子核必须克服裂变的活化能，这是一种能量障碍，必须超越才能使原子核分裂。如果入射中子提供的能量足够，原子核将经历裂变，释放出大量能量。裂变的活化能受到多种因素的影响，包括可裂变材料的类型、入射中子的能量以及环境的温度。例如，热中子，即慢速中子，相较于快速中子更容易在某些材料中引发裂变。这就是为什么许多核反应堆使用减速剂，如水或石墨，来减缓中子的速度，从而增加裂变发生的可能性。通过精心管理裂变的活化能，反应堆操作员可以维持稳定和可控的核反应，确保安全和效率。另一方面，在核武器的背景下，裂变的活化能是实现快速和不受控制的裂变反应的关键因素。在核弹中，常规爆炸物用于压缩一个次临界质量的可裂变材料，形成超临界状态。这种突然而强烈的压缩增加了材料的密度，提高了裂变发生的机会，因为它有效地降低了裂变的活化能。结果是以爆炸的形式释放出巨大的能量。总之，裂变的活化能是支撑核裂变过程的基础概念。理解这一点对于安全有效地利用核能至关重要，无论是在发电还是军事应用中。随着核科学研究的不断发展，我们对影响裂变的活化能的因素的理解也将不断深化，为能源生产和核技术的进步铺平道路。