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Berkeley Group Reports Discovery of Element 104

JUL 01, 1969

DOI: 10.1063/1.3035681

Physics Today

A Berkeley group says it has positively identified two isotopes of element 104, X 257 104 and X 259 104 . Speaking at the American Chemical Society’s Mendeleev Centennial Symposium, Albert Ghiorso said that they also think they have found X 258 104 , but are not yet sure. The group was unable to observe X 260 104 , which Georgi N. Flerov and his collaborators at the Joint Institute for Nuclear Research, Dubna had reported in 1964 (and named kurchatovium).

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© 1969 American Institute of Physics
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This Content Appeared In
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Volume 22, Number 7

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