Measurement of the intensity ratio of Auger and conversion electrons for the electron capture decay of $^{125}$I

• Main Authors: Alotiby, M, Greguric, I, Kibédi, T, Lee, B. Q, Roberts, M, Stuchbery, A. E, Tee, Pi, Tornyi, T, Vos, M
• Format: Journal Article
• Language: English
• Published: 04-03-2018
• Subjects: Physics - Medical Physics; Physics - Nuclear Experiment
• DOI: 10.48550/arxiv.1802.03899

Auger electrons emitted after nuclear decay have potential application in
targeted cancer therapy. For this purpose it is important to know the Auger
electron yield per nuclear decay. In this work we describe a measurement of the
ratio of the number of conversion electrons (emitted as part of the nuclear
decay process) to the number of Auger electrons (emitted as part of the atomic
relaxation process after the nuclear decay) for the case of $^{125}$I. Results
are compared with Monte-Carlo type simulations of the relaxation cascade using
the BrIccEmis code. Our results indicate that for $^{125}$I the calculations
based on rates from the Evaluated Atomic Data Library (EADL) underestimate the
K Auger yields by 20\%.