Data are tabulated to identify all major and minor gamma-ray interferences which may effect the area determinations of analytical
photopeaks for all principle isotopes (of half life greater than about one day) encountered during the routine instrumental
neutron activation analysis of silicate rocks. These photopeaks cover the energy range 60–1700 keV and are based on data abstracted
from ERDTMANN and SOYKA.8 Interferences are listed down to relative intensities of 0.001% and include principle sum peaks. Photopeaks which are considered
to be most reliable for routine quantitative analysis are identified.