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1 ounce silver buffalo rounds....
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<p>[QUOTE="Oldhoopster, post: 4689341, member: 84179"]XRF only penetrates slightly below the surface. The depth depends on the metal and energy of the beam. I generally figure 100 microns +/- (0.1 mm) for handheld units based on stuff I've read in the past, but that's just a gut feel number. I hope the scientists will correct me if I'm way off base. </p><p><br /></p><p>Thick plating can fool XRF. I think that's how the gold plated tungsten bars fooled people.[/QUOTE]</p><p><br /></p>
[QUOTE="Oldhoopster, post: 4689341, member: 84179"]XRF only penetrates slightly below the surface. The depth depends on the metal and energy of the beam. I generally figure 100 microns +/- (0.1 mm) for handheld units based on stuff I've read in the past, but that's just a gut feel number. I hope the scientists will correct me if I'm way off base. Thick plating can fool XRF. I think that's how the gold plated tungsten bars fooled people.[/QUOTE]
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1 ounce silver buffalo rounds....
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