Europium radionuclides in samarium-153-Ethylene Diamine Tetramethylene phosphonic acid (Sm-EDTMP) radiopharmaceutical waste.

Sm-EDTMP is widely used as a palliative radiopharmaceutical for treatment of metastatic bone pain. It is produced by neutron activation of enriched Sm targets in a nuclear reactor. The long-lived europium radionuclides are co-produced along with production of Sm and it give rise to radioactive waste in Sm-EDTMP production.