| 单词 |
carbon-14 |
| 释义 |
carbon-14
car·bon-14 C0100000 (kär′bən-fôr-tēn′)n. A naturally occurring, radioactive carbon isotope with an atomic mass of 14 and a half-life of 5,730 years, used in determining the age of ancient organic, geologic, or archaeological specimens.carbon-14
carbon-14[′kär·bən ′fȯr‚tēn] (nuclear physics) A naturally occurring radioisotope of carbon having a mass number of 14 and half-life of 5780 years; used in radiocarbon dating and in the elucidation of the metabolic path of carbon in photosynthesis. Also known as radiocarbon. carbon-14
carbon-14 A natural beta-emitting radioisotope of carbon that has a T1/2 of 5720 years, which decays to 14N. It has been used as a biotracer and in anthropology for dating carbon-rich materials, especially newer fossils, and can determine the age of carbon-based materials up to 60,000 years old.carbon-1414C A radioactive isotope of carbon with a half-life of 5600 years; mass number 14; atomic mass (weight) 14. It is used as a tracer in metabolic studies and in archaeology to date materials containing carbon. carbon-14 see CARBON DATING.ThesaurusSeecarbon 14 |
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