radiative capture cross section

简明释义

辐射捕获截面

英英释义

例句

1.The radiative capture cross section 辐射俘获截面 is often calculated using theoretical models and experimental data.

通常使用理论模型和实验数据来计算辐射俘获截面 radiative capture cross section。

2.Understanding the radiative capture cross section 辐射俘获截面 can lead to advancements in nuclear medicine.

理解辐射俘获截面 radiative capture cross section 可以推动核医学的发展。

3.Researchers used advanced detectors to analyze the radiative capture cross section 辐射俘获截面 of various isotopes.

研究人员使用先进的探测器分析了各种同位素的辐射俘获截面 radiative capture cross section。

4.In nuclear physics, the radiative capture cross section 辐射俘获截面 helps predict the behavior of neutrons in reactors.

在核物理中，辐射俘获截面 radiative capture cross section 有助于预测反应堆中中子的行为。

5.The measurement of the radiative capture cross section 辐射俘获截面 is crucial for understanding nuclear reactions in stars.

测量辐射俘获截面 radiative capture cross section 对于理解恒星中的核反应至关重要。

作文

In the field of nuclear physics, understanding various interactions between particles is crucial for both theoretical studies and practical applications. One such important concept is the radiative capture cross section, which plays a significant role in nuclear reactions involving photons and nuclei. The radiative capture cross section refers to the probability of a nucleus capturing a photon and subsequently transitioning to an excited state, which can lead to the emission of gamma rays. This process is essential in various astrophysical processes, such as nucleosynthesis in stars, where elements are formed through nuclear reactions under extreme conditions.The radiative capture cross section is typically measured in barns, a unit used to express the likelihood of interaction in nuclear physics. The larger the cross section, the higher the probability that the interaction will occur. This parameter is not only vital for understanding stellar processes but also for applications in nuclear reactors and medical imaging techniques. For instance, in nuclear reactors, knowing the radiative capture cross section of different isotopes helps in predicting how they will behave under neutron bombardment, which is critical for maintaining safety and efficiency.In astrophysics, the radiative capture cross section helps scientists understand how elements such as carbon, oxygen, and heavier elements are formed in the cores of stars. During the life cycle of a star, it undergoes various stages of fusion, and the interactions governed by the radiative capture cross section determine the pathways through which these elements are synthesized. For example, during the helium burning phase in massive stars, the capture of photons by certain isotopes can lead to the formation of heavier elements, contributing to the cosmic abundance of matter in the universe.Moreover, experimental techniques have been developed to measure the radiative capture cross section with high precision. These experiments often involve using particle accelerators to bombard targets with neutrons or protons, followed by detecting the resulting gamma rays emitted during the capture process. The data obtained from these experiments are crucial for refining theoretical models of nuclear reactions and improving our understanding of the fundamental forces at play in the universe.In summary, the radiative capture cross section is a key parameter in nuclear physics that describes the likelihood of a nucleus capturing a photon. Its significance extends beyond theoretical implications, influencing practical applications in nuclear technology and astrophysics. Understanding this concept not only enhances our knowledge of nuclear interactions but also sheds light on the processes that govern the formation of elements in the universe. As research continues to advance, the precise measurement and interpretation of the radiative capture cross section will remain a focal point in the study of nuclear reactions and their applications in modern science.

在核物理领域，理解粒子之间的各种相互作用对理论研究和实际应用至关重要。其中一个重要概念是辐射俘获截面，它在涉及光子和原子核的核反应中发挥着重要作用。辐射俘获截面指的是一个原子核捕获光子并随后跃迁到激发态的概率，这一过程可能导致伽马射线的发射。这一过程在各种天体物理过程中至关重要，例如恒星中的核合成，在极端条件下形成元素。辐射俘获截面通常以barn为单位进行测量，这是一个用于表达核物理中相互作用可能性的单位。截面越大，发生相互作用的概率就越高。这个参数不仅对理解恒星过程至关重要，而且对核反应堆和医学成像技术等应用也至关重要。例如，在核反应堆中，了解不同同位素的辐射俘获截面有助于预测它们在中子轰击下的行为，这对于维持安全性和效率至关重要。在天体物理学中，辐射俘获截面帮助科学家理解碳、氧和更重元素如何在恒星核心形成。在恒星的生命周期中，它经历了各种融合阶段，而由辐射俘获截面主导的相互作用决定了这些元素合成的途径。例如，在大质量恒星的氦燃烧阶段，某些同位素对光子的捕获可以导致更重元素的形成，从而贡献于宇宙物质的丰度。此外，已经开发出实验技术，以高精度测量辐射俘获截面。这些实验通常涉及使用粒子加速器轰击靶材，随后检测在俘获过程中发射的伽马射线。通过这些实验获得的数据对完善核反应的理论模型和提高我们对宇宙中基本力量的理解至关重要。总之，辐射俘获截面是核物理中的一个关键参数，描述了一个原子核捕获光子的可能性。它的重要性超越了理论意义，影响着核技术和天体物理学中的实际应用。理解这一概念不仅增强了我们对核相互作用的知识，还阐明了支配宇宙中元素形成的过程。随着研究的不断发展，精确测量和解释辐射俘获截面将继续成为核反应及其在现代科学中应用研究的焦点。