View source for Libby Develops Radiocarbon Dating ← Libby Develops Radiocarbon Dating You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in the group: Users. You can view and copy the source of this page. '''This article is a stub. Please help expand the article by using the edit tab.''' In 1948, Willard Frank Libby developed the theory of an atomic clock and [[Charles Townes|Charles Hard Townes]] took the research further by using an ammonia molecule. In 1955, Louis Essen built the first accurate atomic clock when he used cesium, which is the current timekeeping standard. '''See also:''' [[Oral-History:Charles Townes (1991)|Charles Townes' 1991 Oral History]], [[Oral-History:Charles H. Townes (1992)|Charles Townes' 1992 Oral History]] [[Category:Measurement]] [[Category:Time_measurement]] [[Category:Engineered_materials_&_dielectrics|Category:Engineered_materials_&_dielectrics]] Return to Libby Develops Radiocarbon Dating. Retrieved from "https://ethw.org/Libby_Develops_Radiocarbon_Dating"