iodine-125

Introduction

radioactive isotope of iodine

Occurrence

• reactor-produced radionuclide
• available in large quantities
• created by the electron capture decay of Xenon-125

Uses

• biological assays
• nuclear medicine imaging
• brachytherapy

Pharmacokinetics

• 1/2 life ~ 59 days
• decays by electron capture to an excited state of with release of gamma-radiation to tellurium-125

More general terms

• iodine [I]
• radioactive isotope