radioactive isotope

简明释义

放射性同位素

英英释义

例句

1.Geologists often use radioactive isotopes to date rocks and fossils.

地质学家经常使用放射性同位素来测定岩石和化石的年龄。

2.The radioactive isotope used in the experiment has a half-life of just a few minutes.

实验中使用的放射性同位素的半衰期仅为几分钟。

3.In nuclear medicine, radioactive isotopes are essential for diagnostic imaging.

在核医学中，放射性同位素对诊断成像至关重要。

4.Scientists discovered a new radioactive isotope that could help in cancer treatment.

科学家发现了一种新的放射性同位素，可能有助于癌症治疗。

5.The doctor used a radioactive isotope to trace the function of the thyroid gland.

医生使用了一种放射性同位素来追踪甲状腺的功能。

作文

Radioactive isotopes, also known as radioisotopes, are variants of chemical elements that have unstable nuclei and emit radiation during their decay process. This phenomenon occurs because the nucleus of a radioactive isotope contains an imbalance in the number of protons and neutrons, which leads to instability. Over time, these isotopes undergo radioactive decay, transforming into more stable forms while releasing energy in the form of radiation. The study and application of radioactive isotope (放射性同位素) technology have become crucial in various fields, including medicine, archaeology, and energy production.In medicine, radioactive isotopes (放射性同位素) play a vital role in diagnostics and treatment. One of the most common applications is in cancer therapy, where isotopes like iodine-131 are used to target and destroy cancerous cells. Additionally, radioactive isotopes (放射性同位素) are employed in imaging techniques such as positron emission tomography (PET) scans, which allow doctors to visualize metabolic processes in the body. These advancements not only improve patient outcomes but also enhance our understanding of various diseases.In archaeology, radioactive isotopes (放射性同位素) are instrumental in dating ancient artifacts and fossils through a technique known as radiocarbon dating. By measuring the remaining amount of carbon-14, a radioactive isotope (放射性同位素) found in organic materials, scientists can estimate the age of archaeological finds. This method has been pivotal in reconstructing human history and understanding the timeline of civilization.Furthermore, in the field of energy production, radioactive isotopes (放射性同位素) are utilized in nuclear power plants to generate electricity. Uranium-235 and plutonium-239 are examples of isotopes that undergo fission reactions, releasing a significant amount of energy that can be harnessed for power generation. While this method provides a substantial energy output, it also raises concerns regarding safety and radioactive waste management.Despite their numerous benefits, the use of radioactive isotopes (放射性同位素) also poses risks. Exposure to high levels of radiation can lead to serious health issues, including cancer. Therefore, strict regulations and safety protocols are essential when handling these materials. Research continues to explore safer alternatives and improved methods for utilizing radioactive isotopes (放射性同位素) in various applications.In conclusion, radioactive isotopes (放射性同位素) are powerful tools that have transformed multiple disciplines. From advancing medical treatments to uncovering historical mysteries and providing energy solutions, their impact is profound. As we continue to innovate and refine our understanding of radioactive isotopes (放射性同位素), it is crucial to balance their benefits with safety measures to protect both people and the environment.