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Tellurium Isotopes

Stable Tellurium Isotopes - Te Isotopes
Nominal
mass
Accurate
mass
% Natural
abundance
Chemical
form
Enrichment
available %

120 Te 119.904048 (21) 0.09 (1) metal 11 - 40

122 Te 121.903050 (3) 2.55 (12) metal, oxide 83 - 93+

123 Te 122.9042710 (22) 0.89 (3) metal, oxide 68 - 99+

124 Te 123.9028180 (18) 4.74 (8) metal, oxide 90 - 92+

125 Te 124.9044285 (25) 7.07 (15) metal 69 - 92+

126 Te 125.9033095 (25) 18.84 (25) metal, oxide 96 - 98+

128 Te 127.904463 31.74 metal, oxide 74 - 99+

130 Te 129.906229 (5) 34.08 (62) metal, oxide, fluoride 99+
 
Tellurium has eight stable isotopes (Te-120 and Te-123 are usually considered stable because of their long half lives) and many of them have a medical application. Te-120 is used for the production of I-120g which has an application as a PET and Beta emitting isotope. Te-122 is used in the production of the radioisotope I-122 which is used in gamma imaging. Te-123 is used for the production of radioactive I-123 which is used in thyroid imaging. Te-124 is used for the production of both I-123 and the PET isotope I-124. Finally, Te-130 is used in the research into double Beta decay.