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Ytterbium Isotopes

Stable Ytterbium Isotopes - Yb Isotopes
Nominal mass Accurate
mass
% Natural abundance Chemical
form
Enrichment available %

168 Yb     oxide 22 - 42+

170 Yb     oxide 72 - 83+

171 Yb 170.936323 (3) 14.3 (57) oxide 91 - 95+

172 Yb 171.936378 (3) 21.83 (67) oxide 95 - 97+

173 Yb 172.938208 (3) 16.13 (27) oxide, metal 85 - 92+

174 Yb 173.938859 (3) 31.8 (92) oxide 86 - 99+

176 Yb 175.942564 (4) 12.7 (41) oxide 96 - 99+
 
Ytterbium has seven stable isotopes and two of them are used for medical and industrial purposes. Yb-168 is used for the production of Yb-169 and this radioisotope is used as a radiation source in gamma cameras. Yb-169 is also used in the medical field where it has been proposed as an alternative for I-125 and Pd-103 in the treatment of prostate cancer while it is also used for diagnostics in the gastrointestinal tract. Yb-176 can be used as a target for the production of carrier-free Lu-177 with a high specific activity. Yb-171 in an excited state has been proposed as an optical frequency standard, while the other Yb isotopes are used in various physics experiments.