unstable isotope

简明释义

不稳定同位素

英英释义

例句

1.An unstable isotope (不稳定同位素) can emit radiation as it decays, which can be harmful in large doses.

一个不稳定同位素（unstable isotope）在衰变时可以发出辐射，大剂量时可能有害。

2.Researchers are studying the behavior of an unstable isotope (不稳定同位素) to understand its potential applications in energy production.

研究人员正在研究一个不稳定同位素（unstable isotope）的行为，以了解其在能源生产中的潜在应用。

3.In nuclear medicine, doctors often use an unstable isotope (不稳定同位素) to diagnose diseases through imaging.

在核医学中，医生常常使用一个不稳定同位素（unstable isotope）通过成像来诊断疾病。

4.The unstable isotope (不稳定同位素) of carbon, known as carbon-14, is used in radiocarbon dating.

碳的不稳定同位素（unstable isotope）称为碳-14，被用于放射性碳测年。

5.The radioactive dating technique relies on the decay of an unstable isotope (不稳定同位素) to determine the age of ancient artifacts.

放射性测年技术依赖于一个不稳定同位素（unstable isotope）的衰变来确定古代文物的年龄。

作文

An unstable isotope is a variant of a chemical element that has an unstable nucleus, leading to the emission of radiation as it decays into a more stable form. The study of unstable isotopes is crucial in various fields, including medicine, archaeology, and nuclear physics. Understanding these isotopes provides insight into the fundamental processes of nature and their applications in technology and science.In medicine, unstable isotopes play a vital role in diagnostic imaging and treatment. For instance, radioactive isotopes such as technetium-99m are widely used in nuclear medicine for imaging purposes. When injected into the body, this unstable isotope emits gamma rays, which can be detected by special cameras to produce detailed images of organs and tissues. This non-invasive technique allows doctors to diagnose conditions such as cancer or heart disease effectively.Moreover, unstable isotopes are also employed in cancer treatment through a process called radiotherapy. Certain isotopes emit radiation that can target and destroy cancer cells while minimizing damage to surrounding healthy tissue. This targeted approach has made significant advancements in treating various cancers, improving patient outcomes and survival rates.In archaeology, unstable isotopes are used in radiocarbon dating, a technique that helps determine the age of ancient organic materials. Carbon-14, an unstable isotope of carbon, is produced in the atmosphere and absorbed by living organisms. Upon death, the uptake of carbon-14 ceases, and its concentration decreases over time due to radioactive decay. By measuring the remaining amount of carbon-14 in a sample, scientists can estimate when the organism died, providing valuable insights into historical timelines and human evolution.Furthermore, in the realm of nuclear physics, the study of unstable isotopes contributes to our understanding of nuclear reactions and the behavior of matter under extreme conditions. Research on isotopes like uranium-235 and plutonium-239 has been pivotal in the development of nuclear energy and weapons. These isotopes undergo fission, releasing a tremendous amount of energy that can be harnessed for electricity generation or, unfortunately, for destructive purposes.Despite their benefits, unstable isotopes also pose challenges, particularly concerning safety and environmental impact. The handling and disposal of radioactive materials require strict regulations to protect human health and the environment from potential hazards. Accidents involving unstable isotopes, such as those at nuclear power plants, highlight the importance of rigorous safety measures and public awareness regarding radiation exposure.In conclusion, unstable isotopes are fascinating components of our natural world with significant implications across various fields. Their applications in medicine, archaeology, and nuclear physics demonstrate their versatility and importance in advancing human knowledge and technology. However, the associated risks necessitate careful management and regulation to ensure safety and minimize environmental impact. As research continues, the understanding and utilization of unstable isotopes will undoubtedly evolve, offering new possibilities and challenges for future generations.

不稳定同位素是化学元素的一种变体，其核不稳定，导致其衰变为更稳定形式时释放辐射。研究不稳定同位素在医学、考古学和核物理等多个领域至关重要。理解这些同位素能够深入了解自然的基本过程及其在技术和科学中的应用。在医学中，不稳定同位素发挥着重要作用，尤其是在诊断成像和治疗方面。例如，放射性同位素如锝-99m被广泛用于核医学成像。当注入体内时，这种不稳定同位素会发出伽马射线，可以被特殊摄像机探测，从而产生器官和组织的详细图像。这种非侵入性技术使医生能够有效地诊断癌症或心脏病等疾病。此外，不稳定同位素也被用于癌症治疗，通过一种称为放射治疗的过程。某些同位素发出的辐射可以针对并摧毁癌细胞，同时最小化对周围健康组织的损害。这种靶向方法在治疗各种癌症方面取得了显著进展，提高了患者的治疗效果和生存率。在考古学中，不稳定同位素被用于放射性碳定年，这是一种帮助确定古代有机材料年龄的技术。碳-14是碳的一种不稳定同位素，在大气中产生并被生物吸收。生物死亡后，碳-14的摄取停止，其浓度因放射性衰变而随时间减少。通过测量样本中剩余的碳-14量，科学家可以估计生物死亡的时间，为历史时间线和人类演化提供宝贵的见解。此外，在核物理领域，对不稳定同位素的研究有助于我们理解核反应和物质在极端条件下的行为。对铀-235和钚-239等同位素的研究在核能和武器的发展中起到了关键作用。这些同位素经历裂变，释放出巨大的能量，可用于发电，或者不幸的是，用于破坏目的。尽管不稳定同位素带来了好处，但它们也带来了挑战，特别是关于安全性和环境影响。处理和处置放射性材料需要严格的法规，以保护人类健康和环境免受潜在危害。涉及不稳定同位素的事故，例如核电站的事故，突显了严格安全措施和公众对辐射暴露意识的重要性。总之，不稳定同位素是我们自然世界中引人入胜的组成部分，在多个领域具有重要意义。它们在医学、考古学和核物理中的应用展示了它们的多功能性和推动人类知识与技术进步的重要性。然而，相关的风险需要谨慎管理和规范，以确保安全并最小化环境影响。随着研究的继续，对不稳定同位素的理解和利用无疑将不断发展，为未来几代人提供新的可能性和挑战。