This Day In History
Wednesday, June 3, 2020
On This Day

February 4, 1936

Radium becomes the first radioactive element to be made synthetically. On 4 February 1936, radium E (bismuth-210) became the first radioactive element to be made synthetically in the United States. Dr. John Jacob Livingood, at the radiation lab at University of California, Berkeley, was bombarding several elements with 5-MEV deuterons. He noted that irradiated bismuth emits fast electrons with a 5-day half-life, which matched the behavior of radium E.
Radium,radioactive
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