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地球科学家们已发现另一种以激光为基础的测定地质年代的方法。早先,美国橡树岭国家实验室的一个小组研究出一种方法,它能通过惰性气体的放射性同位素来测定古代水样的年代。目前英国Simon Fraser 大学研究人员则利用放射性同位素来测定沉积物样品的年代。
Earth scientists have discovered another laser-based method of determining geologic age. Earlier, a team at Oak Ridge National Laboratory in the United States developed a method to determine the age of ancient water samples by radioactive isotopes of inert gases. At present, researchers at Simon Fraser University in the UK use radioisotopes to determine the age of sediment samples.