Auger electrons for cancer therapy – a review

EJNMMI Radiopharmacy and Chemistry

Table 1 Properties of Auger electron-emitting radionuclides ^a

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
¹⁶¹Tb^b	6.9 d	0.9^c	5.1^c	5.7	1.4	36.7	26.2

^a The number of AEs and IC electrons were obtained from MIRD Radionuclide and Decay Schemes (Eckerman and Endo 2008)
^b The number of AEs and IC electrons were obtained from the National Nuclear Data Center for ¹⁶¹Tb (65-Terbium-161 2011)
^c Calculation based on K and L shell Auger electrons only