Application of Thermo Scientific Portable XRF Analyzers ...
XRF Analyzers for U-Th Exploration An Example from Nopal Project, NE Mexico Application Note Introduction Uranium is a rare element with an average concentration of 2.7 ppm on the earth's crust. In nature, it occurs mainly as U238 (>99%) whereas U235 (fissionable) is only about 0.7%. U234 is less than 0.1%. The large size
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