美国加州大学伯克利分校的研究团队利用公元79年维苏威火山爆发摧毁庞贝这一历史事件，显著提升了氩氩测年技术的精确度1。通过对小普林尼历史记载的火山爆发日期（8月24日）进行校准，研究人员将测年精度提高到0.7%，准确度达0.4%1。这一改进使氩氩测年技术能够在记录历史范围内的火山事件中达到10年的精度1。
此次研究的关键成果是对钾-40半衰期的重新测定，新值为12.044 ± 0.088亿年，相比之前的测量精度提高了一倍1。伯克利地球年代学中心、加州大学伯克利分校与帕多瓦大学组成的研究团队利用康妮·哈斯勒将庞贝出土硬币与同时期罗马硬币对比的方法，将火山爆发日期确定在两个月内误差范围1。
这一更精准的测年技术对地球历史研究具有广泛意义1。保罗·雷内团队曾在约66百万年前利用氩氩测年法确定陨石撞击、印度火山喷发和恐龙灭绝三个事件都发生在数万年内1。改进后的方法将为火山喷发、陨石撞击、物种灭绝等重大地质事件提供更可靠的年代测定1。
Researchers at the University of California, Berkeley have leveraged the well-documented destruction of Pompeii by Mount Vesuvius in 79 A.D. to refine the accuracy of argon-argon dating, a technique crucial for establishing timelines of major geological and biological events 1. By calibrating their measurements against the eruption date of August 24, recorded by Pliny the Younger, the team achieved a precision of 0.7 percent with an accuracy of 0.4 percent 1. This breakthrough also produced a new value for the half-life of potassium-40 at 1.2044 ± 0.0088 billion years, representing a two-fold improvement in precision compared to previously established values 1.
The enhanced dating method enables scientists to determine the ages of volcanic events within a ten-year margin of error for events within recorded history 1. Researchers from Berkeley's Geochronology Center, UC Berkeley, and the University of Padua contributed to the study 1. Connie Hassler compared coins excavated from Pompeii with contemporary Roman coins to narrow the eruption date to within a two-month window 1. The refined argon-argon technique has already demonstrated its value in addressing longstanding questions about Earth's past: Paul Renne's team previously used the method to determine that the asteroid impact, Indian volcanic activity, and dinosaur extinction approximately 66 million years ago all occurred within a span of tens of thousands of years 1.
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