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Radiation spectra for Auger‐electron emitting radionuclides: Report No. 2 of AAPM Nuclear Medicine Task Group No. 6
Author(s) -
Howell Roger W.
Publication year - 1992
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.596927
Subject(s) - radionuclide , monte carlo method , dosimetry , spectral line , electron , auger effect , radiation , absorbed dose , task group , nuclear medicine , physics , radiation protection , auger electron spectroscopy , nuclear physics , medicine , mathematics , statistics , engineering management , astronomy , engineering
Radiation spectra for radionuclides currently provided by the MIRD Committee and ICRP do not include the very low‐energy N‐ and O‐shell Auger electrons. These electrons, emitted in large numbers by radionuclides decaying by electron capture and/or internal conversion, are important for determining the absorbed dose in microscopic volumes. Accordingly, the present AAPM Report employs Monte Carlo computational methods to obtain a self‐consistent set of complete radiation spectra for a variety of radionuclides including 55 Fe, 67 Ga, 99 m Tc, 111 In, 113 m In, 115 m In, 123 I, 125 I, 193 m Pt, 195 m Pt, 201 Tl, and 203 Pb. Although the conventional spectra provided by MIRD and ICRP are adequate for most dosimetry calculations, the Auger electron spectra provided in this report are recommended for calculating the dose to target volumes <1 μm in diameter.