Sammenlign metoder
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| Radiokarbondatering× | Massespektrometri med isotopforhold (IRMS)× | |
|---|---|---|
| Fagområde | Geofysik | Geofysik |
| Familie | Process / pipeline | Process / pipeline |
| Oprindelsesår≠ | 1949 | 1994 |
| Ophavsperson≠ | Willard Libby | Thomas Coplen and others |
| Type≠ | Chronometric method based on ¹⁴C decay | Measurement of stable and radiogenic isotope ratios |
| Oprindelig kilde≠ | Libby, W. F. (1949). Radiocarbon dating. University of Chicago Press. link ↗ | Coplen, T. B. (1994). Reporting of stable hydrogen, carbon, and oxygen isotopic abundances. Pure and Applied Chemistry, 66(2), 273-276. DOI ↗ |
| Aliasser≠ | ¹⁴C dating, Carbon-14 dating | IRMS |
| Relaterede | 3 | 3 |
| Resumé≠ | Radiocarbon dating is a radiometric technique that determines the age of organic materials by measuring the radioactive decay of ¹⁴C (carbon-14), a rare isotope produced in the atmosphere by cosmic ray interactions. Developed by Willard Libby in 1949, radiocarbon dating became a foundational method in archaeology, paleoclimate studies, and geology, enabling dating of organic materials from the past ~50,000 years with typical precision of ±50–100 years. | Isotope Ratio Mass Spectrometry (IRMS) is an analytical technique that measures the relative abundance of stable isotopes (H, C, N, O, S) and some radiogenic isotopes (e.g., ⁸⁷Sr/⁸⁶Sr) in samples with high precision. Standardized by Coplen and colleagues, IRMS enables paleoclimate reconstruction, source tracing (diet, water origin), geochemical fingerprinting, and age dating through radiogenic isotopes. |
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