Message:

<p>[QUOTE=&quot;Conder101, post: 2143800, member: 66&quot;]I would be highly suspect of this claim.&nbsp; X-rays typically don&#039;t penetrate metals too well unless they are low density metals or very powerful X-rays.&nbsp; Normally these X-ray composition tests only test a short distance into the sample.</p><p><br /></p><p><br /></p><p>The sensor is on the opposite side of the coin from the X-ray source?&nbsp; If that is true it could be a high power X-ray source.&nbsp; It would be interesting so see how it reports a 40% silver clad half dollar.</p><p><br /></p><p>Usually these composition detection devices work by re-emission.&nbsp; The initial X-ray exposure excites the atoms.&nbsp; As the atoms return to the lower resting state they re-emit X-rays with each element re-emitting its own characteristic frequency.&nbsp; The frequencies present tell you what elements are present and the relative strengths of each frequency tells you the percentage composition of each element.</p><p><br /></p><p><br /></p><p>&quot;Ring&quot; tests are NOT a very good authenticity testing method.&nbsp; Way too many variables that can affect the results, and interpretation of the results is questionable[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in