Einsteinium was discovered by A Ghiorso and co-workers in 1952 in radioactive debris from the first large thermonuclear bomb explosion, which took place in the Pacific at Eniwetok in November 1952. Publication of the discovery was withheld until 1954 for security reasons. In 1961, a sufficient amount of einsteinium was produced to permit separation of a macroscopic amount of 253Es .
Origin of name
Named after Albert Einstein .