Antiomony(Sb)

Tellurium(Te) to Antimony(Sb)

\gamma + Te-120 -> Sb-119 + p

Sb-119 is an Auger electron emitter

Sb-117 is a PET analog => in 2 hrs Sb-117 decays emitting a positron that will annihilate and produce two 511 keV photons for a PET imager to detect.

References

Accelerator based Production of Auger-Electron-emitting Isotopes for Radionuclide Therapy Helge ThisgaardR, PhD-theis, pg 22; Thesis may have led to this publication Thisgaard H.; Jensen M. Production of the Auger emitter 119Sb for targeted radionuclide therapy using a small PET-cyclotron. Appl. Radiat. Isot. 2009, 67, 34–38.

The Paradox of Using Radionuclides To Treat Disease, Thomas E. Albrecht-Schmitt, ACS Cent Sci. 2019 Mar 27; 5(3): 383–385