An official website of the European Union How do you know?      
European Commission logo
JRC Publications Repository Menu

Analytical Chemistry of Plutonium

cover
In 1940, shortly after the discovery of fission, McMillan and Abelson studied the recoil range of fission products induced by neutrons incident on a thin uranium foil (McMillan, 1939; McMillan and Abelson, 1940). While fission products were mostly ejected from the foil, two activities were significantly retained, one with a half-life of 23 min and the other with a half-life of 2.3 days. The shorter activity was known (Meitner et al., 1937) to belong to 239U, produced by neutron capture in 238U; the longer-lived activity was demonstrated to be the beta-decay daughter of 239U, an isotope of the new element neptunium, which had an atomic number of 93. By analogy, just as the beta decay of 239U produces 239Np, the subsequent beta decay of 239Np must also produce an isotope of a new element with atomic number 94 (plutonium), which was not observable in earlier experiments because of a lack of sensitivity for the detection of radioactive species with long half-lives.
2010-12-15
Springer
JRC62368
978-90-481-3146-4,   
Language Citation
NameCountryCityType
Datasets
IDTitlePublic URL
Dataset collections
IDAcronymTitlePublic URL
Scripts / source codes
DescriptionPublic URL
Additional supporting files
File nameDescriptionFile type 
Show metadata record  Copy citation url to clipboard  Download BibTeX
Items published in the JRC Publications Repository are protected by copyright, with all rights reserved, unless otherwise indicated. Additional information: https://ec.europa.eu/info/legal-notice_en#copyright-notice