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Updated: Jun 3, 2025

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北美考古同位素存储库北美考古同位素存储库

Traci N Billings1,2,3, Erin Scott4, Carlo Cocozza4,5,6

  • 1Department of Archaeology, Max Planck Institute of Geoanthropology, Jena, 07745, Germany. billings@gea.mpg.de.

Scientific data
|January 11, 2025
PubMed
概括

北美考古同位素存储库 (NARIA) 是一个新的,大型的,开放访问的数据库,包含来自北美考古样本的28,000多个同位素测量,跨越12,000年. 这个资源有助于研究古代人类的行为,环境和饮食.

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Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay simultaneously. The number of disintegrations per unit time is called the activity (A), which is directly proportional to the number of nuclei in the sample. The decay constant (λ) is an average probability of decay per nucleus in unit time.
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In the early 1900s, English chemist Frederick Soddy realized that an element could have atoms with different masses that were chemically indistinguishable. These different types are called isotopes — atoms of the same element that differ in mass. Isotopes differ in mass because they have different numbers of neutrons but are chemically identical because they have the same number of protons. Soddy was awarded the Nobel Prize in Chemistry in 1921 for this discovery.
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