THE NATURAL ABUNDANCES OF THE URANIUM ISOTOPES

1 March 1956

journal article
Published by Canadian Science Publishing in Canadian Journal of Chemistry

Vol. 34 (3) , 259-264
https://doi.org/10.1139/v56-039

Abstract

Using a surface-ionization mass spectrometer, the natural U²³⁸/U²³⁵ abundance ratio in uranium obtained from Great Bear Lake Pitchblende has been measured to be 137.80 ± 0.14. From a survey of results reported in the literature on U²³⁴ a best value of 17,325 ± 550 was estimated for the natural U²³⁸/U²³⁴ abundance ratio. The corresponding isotopic abundances are 0.7204 ± 0.0007 atom % and 0.00573 ± 0.00018 atom % for U²³⁵ and U²³⁴, respectively.

Keywords

This publication has 3 references indexed in Scilit:

ISOTOPIC CONSTITUTION OF RADIOGENIC LEADS AND THE MEASUREMENT OF GEOLOGICAL TIME
GSA Bulletin, 1954
Isotopic Constitution of Uranium
Nature, 1935
On the Origin of the Actinium Series of Radioactive Elements
Physical Review B, 1932