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Europium Isotopes

Stable Europium Isotopes - Eu Isotopes
Nominal mass Accurate
mass
% Natural abundance Chemical form Enrichment available %

151 Eu 150.919702 (8) 47.8 (3) oxide 97 - 99+

153 Eu 152.921225 (4) 52.2 (3) oxide 99+
 
Both Europium Isotopes are stable and used for the production of radioisotopes. Eu-151 is used for the production of Eu-152 which is used as a reference source in gamma spectroscopy. Eu-153 can be used for the production of high specific activity Sm-153 via fast neutron irradiation.
 
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