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Correspondence
Nature 406, 455 (3 August 2000) | doi:10.1038/35020248
How neptunium led to the birth of plutonium
C. R. Richmond1
- Associate Director Emeritus, Oak Ridge National Laboratory , PO Box 2008, Oak Ridge, Tennessee 37830, USA
I read with interest the material from the 13 May 1950 issue of Nature reported in "50 Years Ago"1. However, the statement "In 1940 the first isotopes of the elements 93 (neptunium) and 94 (plutonium) were produced..." is not quite correct.
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