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一、测化石年龄例1古生物学家常用碳14测定古生物死亡的年代。已知碳的放射性同位素碳14(14C)的半衰期是5730年。大气中的碳14在碳元素中的含量保持不变,是因为宇宙射线中的中子与氮14碰撞而不断生成新的碳14,产生新的碳14的速率与衰变过程中碳14减少的速率
I. Measurement of Fossil Age Example 1 Paleontologists used carbon-14 to determine the age of paleontology. The half-life of known carbon isotope carbon 14 (14C) is 5730 years. The content of carbon 14 in the atmosphere in the carbon remains unchanged because neutrons in cosmic rays collide with nitrogen 14 and continuously generate new carbon 14, resulting in a new rate of carbon 14 and a decrease in carbon 14 during decay. rate