Before revision: The measured transition can be used in an atomic clock measurement to high precision.How the NIST-F1 Caesium Fountain Clock Works The primary motivation behind the development of the atomic fountain derives from the Ramsey method of measuring the frequency of atomic transitions .
After revision: The measured transition can be used in an atomic clock measurement to high precision.How the NIST-F1 Caesium Fountain Clock Works The measurement of the atomic transition in an atomic fountain uses the Ramsey method .