Carbon-14, C-14, 14C or radiocarbon, is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons. Its presence in organic matter is the basis of the radiocarbon dating method pioneered by Willard Libby and colleagues (1949) to date archaeological, geological and hydrogeological samples.

碳-14的 原子核 由6个 质子 和8个 中子 构成，其 半衰期 約為5,730±40年，衰變方式為 β衰變，衰變过程中，碳-14原子轉變為 氮-14 原子。 在地球上有99%的碳以碳-12的形式存在，其次约1%的碳以碳-13的形式存在，而只有萬億分之一（0.0000000001%）的碳-14存在于大气中。 1940年代， 威拉得·利比 在美国 芝加哥大学 利用碳-14的特性发明了 放射性碳定年法，并于1960年获得 诺贝尔化学奖 [3][4][5] 。 由于有机材料中含有碳-14，因此根据它可以确定考古学、地质学和水 …

碳-14，核素符号 14 C，半衰期为5.70E+03a，是碳元素的一种具有放射性的同位素。 可用于标记化合物示踪，测定年代等。 碳-14作为示踪剂，广泛应用于农业、化学、医学、生物学等领域，具有极高的医用价值和科研价值，主要应用包括幽门螺杆菌检测、药代动力学研究等。 [6] 2024年4月20日，碳14靶件从秦山核电重水堆机组中成功抽出，这是中国首次利用核电商用堆批量生产碳14同位素，中国也从此彻底破解了国内碳14同位素依赖进口的难题，实现碳14供应全面国产化。 …

2025年2月20日 · carbon-14, the longest-lived radioactive isotope of carbon, whose decay allows the accurate dating of archaeological artifacts. The carbon-14 nucleus has six protons and eight neutrons, for an atomic mass of 14. The isotope also is used as a tracer in following the course of particular carbon atoms through chemical or biological transformations.

2025年3月13日 · carbon-14 dating, method of age determination that depends upon the decay to nitrogen of radiocarbon (carbon-14). Carbon-14 is continually formed in nature by the interaction of neutrons with nitrogen-14 in the Earth’s atmosphere; the neutrons required for this reaction are produced by cosmic rays interacting with the atmosphere.

2023年10月20日 · Carbon-14 dating works by comparing the ratio of carbon-12 to carbon-14 in a sample to that in a living organism, allowing for the determination of the age of formerly living things fairly precisely. The half-life of carbon-14 is 5,700 years, making it reliable for dating organic matter up to about 60,000 years old, with a formula provided to ...

• Suitable traps may be necessary to collect carbon dioxide if gas or vapor releases are anticipated. This reduces environment releases. • Monitor surfaces routinely and keep records of the results.

2021年10月14日 · Carbon C-14 is an unstable isotope of carbon created when a neutron collides with a nitrogen atom, causing capture of the neutron and release of the proton converting nitrogen to a carbon with fourteen nucleons (6 protons and 8 neutrons). Carbon-14 emits beta particles as it decays and reverts back to nitrogen.

Carbon-14 is a radioisotope of the chemical element carbon, which has 8 neutrons in its atomic nucleus in addition to the element-specific 6 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 14.

2024年11月3日 · Summary: Carbon-14 (C-14) is a radioactive isotope of carbon that plays a pivotal role in various scientific fields, particularly in archaeology and environmental science. This article explores the formation, properties, applications, and significance of carbon-14 and how it is used for radiocarbon dating, the natural processes that sustain it ...