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