The Technological Enhancement of Normally Occurring Radioactive Materials in Red Mud due to the Production of Alumina

Figure 4

Comparison in the gamma energy range 640 to 1120 keV showing the photopeaks for Bi-212 (727.33 keV), Bi-214 (768.36), Ac-228 (794.79 keV), Tl-208 (860.56 keV), Ac-228 (911.16 keV), Ac-228 (964.64 kev and 968.97 keV), and Bi-214 (1120.27 keV) in red mud (red spectrum) and alumina (blue spectrum).