However, many of their daughter products are strong gamma emitters. Thorium-232 is detectable via a 239 keV peak from lead-212, 511, 583 and 2614 keV from thallium-208, and 911 and 969 keV from actinium-228.
The daughter products of thorium-232 emit gamma radiation with high energy levels, which can be detected through specific peaks in the gamma spectrum: 239 keV from lead-212, 511, 583 and 2614 keV from thallium-208, and 911 and 969 keV from actinium-228.