radio active isotope

简明释义

放射性同位素

英英释义

例句

1.The radio active isotope 放射性同位素 used in the experiment had a half-life of only a few hours.

实验中使用的放射性同位素半衰期仅为几个小时。

2.Researchers are studying the effects of radio active isotopes 放射性同位素 on environmental pollution.

研究人员正在研究放射性同位素对环境污染的影响。

3.In nuclear medicine, radio active isotopes 放射性同位素 are often used for imaging and treatment.

在核医学中，放射性同位素通常用于成像和治疗。

4.The doctor used a radio active isotope 放射性同位素 to trace the flow of blood in the patient's body.

医生使用了一个放射性同位素来追踪病人体内的血流。

5.Geologists use radio active isotopes 放射性同位素 to date rocks and understand Earth's history.

地质学家使用放射性同位素来测定岩石的年龄并了解地球的历史。

作文

Radioactive isotopes play a significant role in various fields, including medicine, archaeology, and energy production. A radio active isotope is an isotope of an element that has an unstable nucleus and emits radiation as it decays into a more stable form. This process of decay can release different types of radiation, including alpha particles, beta particles, and gamma rays, which have various applications in science and technology.In medicine, radio active isotopes are widely used for diagnostic imaging and treatment. For example, iodine-131 is commonly utilized in the diagnosis and treatment of thyroid disorders. When administered to patients, this isotope accumulates in the thyroid gland and emits radiation, which can be detected through imaging techniques. This allows doctors to assess the function of the thyroid and identify any abnormalities. Additionally, radio active isotopes can be employed in targeted radiation therapy for cancer treatment. By using isotopes that emit high-energy radiation, medical professionals can precisely target and destroy cancerous cells while minimizing damage to surrounding healthy tissue.In archaeology, radio active isotopes are essential for dating ancient artifacts and fossils. Carbon-14 dating, for instance, relies on the presence of the radio active isotope carbon-14 in organic materials. Living organisms continuously absorb carbon from the atmosphere, including a small amount of carbon-14. Upon death, the carbon-14 begins to decay at a known rate, allowing scientists to calculate the age of the specimen based on the remaining amount of this isotope. This technique has revolutionized our understanding of human history and prehistory by providing accurate timelines for archaeological findings.Furthermore, radio active isotopes are crucial in the field of energy production. Nuclear power plants utilize the fission of heavy radio active isotopes, such as uranium-235 and plutonium-239, to generate electricity. During fission, the nucleus of an atom splits into smaller parts, releasing a significant amount of energy in the process. This energy is then harnessed to produce steam, which drives turbines to generate electricity. While nuclear energy presents a low-carbon alternative to fossil fuels, it also raises concerns about safety and the management of radioactive waste produced during the process.Despite their benefits, the use of radio active isotopes also poses risks. Exposure to high levels of radiation can lead to serious health issues, including cancer and genetic mutations. Therefore, strict regulations and safety protocols are essential when handling these materials. Researchers and medical professionals must ensure that they take appropriate precautions to minimize exposure and protect both themselves and the public.In conclusion, radio active isotopes are invaluable tools across various disciplines, from medicine to archaeology and energy production. Their unique properties allow us to explore and understand the world around us in ways that would be impossible without them. However, with these advantages come responsibilities to manage the associated risks effectively. As technology advances, the applications of radio active isotopes will likely continue to expand, leading to new discoveries and innovations that can benefit society as a whole.

放射性同位素在医学、考古学和能源生产等多个领域发挥着重要作用。放射性同位素是元素的一种同位素，其原子核不稳定，并在衰变为更稳定形式时释放辐射。这种衰变过程可以释放不同类型的辐射，包括阿尔法粒子、贝塔粒子和伽马射线，这些辐射在科学和技术中具有各种应用。在医学中，放射性同位素广泛用于诊断成像和治疗。例如，碘-131通常用于诊断和治疗甲状腺疾病。当它被施用到患者身上时，这种同位素会积聚在甲状腺中并释放辐射，可以通过成像技术检测到。这使得医生能够评估甲状腺的功能并识别任何异常。此外，放射性同位素还可以用于癌症治疗的靶向放射治疗。通过使用发射高能辐射的同位素，医疗专业人员可以精确地针对并摧毁癌细胞，同时尽量减少对周围健康组织的损害。在考古学中，放射性同位素对于给古代文物和化石定年至关重要。碳-14测年法依赖于有机材料中存在的放射性同位素碳-14。生物体持续从大气中吸收碳，包括少量的碳-14。在死亡后，碳-14开始以已知速率衰变，使科学家能够根据剩余的这种同位素的数量计算标本的年龄。这项技术彻底改变了我们对人类历史和史前时期的理解，通过为考古发现提供准确的时间线。此外，放射性同位素在能源生产领域也至关重要。核电站利用重的放射性同位素（如铀-235和钚-239）的裂变来发电。在裂变过程中，原子的原子核分裂成较小的部分，在此过程中释放出大量能量。这种能量随后被利用来产生蒸汽，驱动涡轮发电。虽然核能提供了低碳的替代化石燃料的选择，但它也引发了关于安全性和管理在此过程中产生的放射性废物的担忧。尽管有其好处，使用放射性同位素也带来了风险。暴露于高水平的辐射可能导致严重的健康问题，包括癌症和基因突变。因此，在处理这些材料时，严格的法规和安全协议是必不可少的。研究人员和医疗专业人员必须确保采取适当的预防措施，以尽量减少暴露并保护自己和公众。总之，放射性同位素是各个学科中不可或缺的工具，从医学到考古学和能源生产。它们独特的性质使我们能够以不可能的方式探索和理解周围的世界。然而，随着这些优势而来的是有效管理相关风险的责任。随着技术的进步，放射性同位素的应用可能会继续扩展，带来新的发现和创新，从而造福整个社会。