Selenium-75 Radioactive Sources

Overview

The successful use of gamma radiography depends on the ability to provide sufficient radiation to penetrate the weld and produce an image of acceptable resolution and contrast on the processed radiographic film. Isotopes with low gamma energies don’t give a good quality due to the inability to penetrate the object being imaged but well Se-75 which Gamma Spectrum is from 66 keV to 401 keV, with two lines of high intensity at 136 keV and 265 keV.