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Table 1 Properties of Auger electron-emitting radionuclides a

From: Auger electrons for cancer therapy – a review

Auger electrons (AEs) Internal conversion (IC) electrons
Radionuclide Half-life AEs/decay Average AE energy per decay (keV) Average energy per AE (keV) IC electrons/decay Average IC electron energy released per decay (keV) Average energy per IC electron (keV)
125I 57 d 23.0 12.0 0.5 0.9 7.3 7.7
123I 13 h 13.7 7.2 0.5 0.2 21.0 222.6
67Ga 78 h 5.0 6.6 1.3 0.3 29.7 14.1
99mTc 6 h 4.4 0.9 0.2 1.1 15.2 13.8
111In 67 h 7.4 6.9 0.9 0.2 27.9 176.1
201Tl 73 h 20.9 14.8 0.7 0.9 29.9 32.9
191Pt 2.8 d 14 17.8 1.3 304 57.1 0.2
193mPt 4.3 d 27.4 10.9 0.4 3.0 126.8 42.4
195mPt 4.0 d 36.6 23.1 0.6 2.8 161.4 58.1
197Hg 64.1 h 23.2 16.1 0.7 0.8 54.1 67.0
197mHg 23.8 h 19.4 13.5 0.7 1.6 203.5 127.0
119Sb 38.2 h 23.7 8.9 0.4 0.8 17.0 20.2
161Tbb 6.9 d 0.9c 5.1c 5.7 1.4 36.7 26.2
  1. a The number of AEs and IC electrons were obtained from MIRD Radionuclide and Decay Schemes (Eckerman and Endo 2008)
  2. b The number of AEs and IC electrons were obtained from the National Nuclear Data Center for 161Tb (65-Terbium-161 2011)
  3. c Calculation based on K and L shell Auger electrons only