delayed fission neutron

简明释义

缓发中子

英英释义

例句

1.During the neutron multiplication factor calculations, we include the contribution of delayed fission neutrons (延迟裂变中子).

在中子倍增因子的计算中，我们包括了delayed fission neutrons (延迟裂变中子)的贡献。

2.In a thermal reactor, the presence of delayed fission neutrons (延迟裂变中子) enhances the likelihood of sustaining a chain reaction.

在热反应堆中，delayed fission neutrons (延迟裂变中子)的存在增强了维持链式反应的可能性。

3.The timing of delayed fission neutrons (延迟裂变中子) emission is crucial for the control of the nuclear reaction rate.

delayed fission neutrons (延迟裂变中子)释放的时机对于核反应速率的控制至关重要。

4.The reactor design must account for the behavior of delayed fission neutrons (延迟裂变中子) to ensure efficient power generation.

反应堆设计必须考虑n>delayed fission neutrons (延迟裂变中子)的行为，以确保高效的发电。

5.The safety analysis of the nuclear reactor relies heavily on understanding delayed fission neutrons (延迟裂变中子) and their impact on reactivity.

核反应堆的安全分析在很大程度上依赖于对delayed fission neutrons (延迟裂变中子)及其对反应性的影响的理解。

作文

In the realm of nuclear physics, understanding the processes that govern fission is crucial for both scientific research and practical applications. One of the key concepts in this field is the term delayed fission neutron, which refers to neutrons emitted by a fissioning nucleus after a brief delay following the initial fission event. This phenomenon plays a significant role in the behavior of nuclear reactors and the dynamics of nuclear explosions. When a heavy nucleus, such as uranium-235 or plutonium-239, undergoes fission, it splits into two smaller nuclei, releasing a considerable amount of energy in the process. The immediate reaction typically produces a number of fast neutrons, which can further induce fission in nearby fissile material. However, not all neutrons are released instantaneously. Some neutrons are emitted after a brief period, which is where the term delayed fission neutron comes into play. These delayed neutrons are crucial because they significantly enhance the controllability of nuclear reactions. The existence of delayed fission neutrons allows for a more manageable chain reaction in nuclear reactors. When operators adjust the control rods or the concentration of fuel, they rely on the presence of these delayed neutrons to maintain a stable reaction. Without them, the reactor would be much harder to control, as the fast neutrons would cause rapid fluctuations in the fission rate, leading to potential safety hazards. In terms of numbers, delayed neutrons constitute only a small fraction of the total neutrons produced during fission—typically around 0.5% to 1%. However, their impact on reactor dynamics is profound. The delayed neutrons have a longer half-life compared to prompt neutrons, which means that they can be used effectively to regulate the reaction over time. This property is essential for achieving a steady state in power generation, allowing for efficient energy production without risking runaway reactions. Moreover, the study of delayed fission neutrons extends beyond civilian nuclear power. In the context of nuclear weapons, the timing and release of these neutrons can influence the yield and efficiency of an explosion. Understanding how these neutrons behave helps scientists design more effective nuclear arsenals while also informing disarmament efforts. In conclusion, the concept of delayed fission neutrons is integral to our understanding of nuclear fission processes. Their role in both nuclear reactors and weapons underscores the importance of mastering this knowledge for safe and effective use of nuclear technology. As we continue to explore the complexities of nuclear physics, the significance of delayed neutrons will only grow, emphasizing the need for ongoing research and education in this vital area of science.

在核物理学领域，理解支配裂变的过程对于科学研究和实际应用至关重要。这个领域中的一个关键概念是术语延迟裂变中子，它指的是在初始裂变事件后，裂变核发射的中子，这些中子会在短暂的延迟后释放。这一现象在核反应堆的行为和核爆炸的动态中发挥着重要作用。当重核，如铀-235或钚-239，发生裂变时，它会分裂成两个较小的核，并在此过程中释放出大量的能量。即时反应通常会产生大量的快中子，这些中子可以进一步诱导附近裂变材料的裂变。然而，并非所有中子都是瞬间释放的。一些中子在短暂的时间后被释放，这就是术语延迟裂变中子的来源。这些延迟中子至关重要，因为它们显著增强了核反应的可控性。延迟裂变中子的存在使得核反应堆中的链式反应更易于管理。当操作员调整控制棒或燃料浓度时，他们依赖这些延迟中子的存在来维持稳定的反应。如果没有它们，反应堆将更加难以控制，因为快中子会导致裂变速率的快速波动，从而导致潜在的安全隐患。在数量上，延迟中子仅占裂变过程中产生的总中子的一个小部分——通常约为0.5%到1%。然而，它们对反应堆动态的影响是深远的。与快速中子相比，延迟中子的半衰期较长，这意味着它们可以有效地用于随时间调节反应。这一特性对于实现发电的稳态至关重要，使得能源生产高效而不危及失控反应的风险。此外，延迟裂变中子的研究不仅限于民用核能。在核武器的背景下，这些中子的释放时机和方式可以影响爆炸的产量和效率。理解这些中子的行为有助于科学家设计更有效的核武器，同时也为裁军工作提供信息。总之，延迟裂变中子的概念是我们理解核裂变过程的核心。它们在核反应堆和武器中的作用突显了掌握这一知识以安全有效利用核技术的重要性。随着我们继续探索核物理的复杂性，延迟中子的意义只会增加，这强调了在这一重要科学领域持续研究和教育的必要性。