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Table 1 Decay properties of 161Tb and 177Lu [3]

From: Contribution of Auger/conversion electrons to renal side effects after radionuclide therapy: preclinical comparison of 161Tb-folate and 177Lu-folate

Radionuclide 161Tb 177Lu
Half-life 6.9 d 6.7 d
av (intensity) 154 keV (1.00) 134 keV (1.00)
Eγ (intensity) 25.7 keV (0.23) 112.9 keV (0.062)
  45 (0.18)* 208.4 keV (0.104)
48.9 keV (0.17)
74.6 keV (0.10)
E of Auger and conversion electrons (intensity) 0–0.1 keV (0.72) 0–0.1 keV (0.27)
0.1–1 keV (7.38) 0.1–1 keV (0.55)
1–10 keV (3.03) 1–10 keV (0.30)
10–20 keV (0.42)  
20–30 keV (0.18)  
30–40 keV (0.39)  
30–40 keV (0.72)  
40–50 keV (0.23) 40–50 keV (0.05)
0–50 keV (12.4) 0–50 keV (1.11)
  1. *x-ray