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Lutetium Isotopes

Stable Lutetium Isotopes - Lu Isotopes
Nominal mass Accurate
mass
% Natural abundance Chemical form Enrichment available %

175 Lu 174.940770 (3) 97.41 (2) oxide 98 - 99+

176 Lu 175.942679 (3) 2.59 (2) oxide 52 - 88+
 
Both Lutetium Isotopes are generally considered to be stable, although strictly speaking Lu-176 is not entirely stable with a half-life of 3.78 x 1010 years. Lu-175 can be used as a yield tracer in the ICP-MS based determination of Pu in urine. Lu-176 is used for the production of radioactive Lu-177 which is a very promising radio-immunotherapy isotope for the treatment of small, soft tumors.
 
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