chain fissions

简明释义

裂变链式反应

英英释义

例句

1.Scientists are studying the efficiency of chain fissions in different materials.

科学家正在研究不同材料中链式裂变的效率。

2.The concept of chain fissions was first proposed in the early 20th century.

链式裂变的概念最早是在20世纪初提出的。

3.In a controlled environment, chain fissions can produce significant energy.

在受控环境中，链式裂变可以产生显著的能量。

4.Understanding chain fissions is crucial for advancements in nuclear energy.

理解链式裂变对于核能的进步至关重要。

5.The nuclear reactor operates on the principle of chain fissions.

核反应堆的运行原理是基于链式裂变。

作文

In the realm of nuclear physics, the concept of chain fissions plays a crucial role in understanding how nuclear reactions can lead to immense energy production. To comprehend this phenomenon, we must first explore what fission is. Fission is the process by which a heavy atomic nucleus splits into two or more smaller nuclei, along with the release of a significant amount of energy. This energy release is not just a one-time event; it can trigger further reactions, leading to a series of additional fissions. This series of reactions is referred to as chain fissions (链式裂变). The most notorious example of chain fissions occurs in nuclear reactors and atomic bombs. In a nuclear reactor, the fuel, typically uranium-235 or plutonium-239, undergoes fission when it absorbs a neutron. The resultant smaller nuclei are unstable and often release more neutrons during their decay. If these newly released neutrons collide with other fissile nuclei, they can induce further fissions, creating a self-sustaining reaction. This is the essence of chain fissions (链式裂变) — a domino effect of nuclear reactions that can produce a tremendous amount of energy. The control of chain fissions (链式裂变) is paramount in nuclear power generation. Engineers use control rods made of materials that absorb neutrons to manage the rate of fission. By inserting or withdrawing these rods from the reactor core, operators can increase or decrease the number of neutrons available to sustain the reaction. This careful balance ensures that the energy produced is consistent and safe, preventing the reactor from overheating or experiencing a meltdown. On the other hand, in the context of nuclear weapons, the objective is to achieve an uncontrolled chain fissions (链式裂变) reaction. The design of an atomic bomb is such that it allows for a rapid release of energy through a runaway chain reaction. When the critical mass of fissile material is reached, the fission process accelerates uncontrollably, resulting in a massive explosion. This destructive potential highlights the dual nature of chain fissions (链式裂变) — while it can be harnessed for peaceful purposes, it also poses significant risks if mismanaged or weaponized. Furthermore, the implications of chain fissions (链式裂变) extend beyond energy production. Understanding this process is vital for advancements in nuclear medicine, where isotopes produced from fission reactions are used for diagnostic imaging and cancer treatment. The medical field benefits from the principles of chain fissions (链式裂变), showcasing the versatility of nuclear science in various applications. In conclusion, chain fissions (链式裂变) represent a fundamental concept in nuclear physics with far-reaching consequences. From powering cities to the catastrophic potential of nuclear weapons, the ability to control and understand this process is essential. As we continue to explore the frontiers of nuclear technology, it is imperative to approach chain fissions (链式裂变) with both respect and caution, ensuring that its benefits are maximized while minimizing the associated risks.