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Isotopes
212202219
Isotopes and Centrifugation
(p. 2)
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EXPERIMENTING WITH THE MODEL
In the simulator below we will try to duplicate the forces inside a centrifuge test tube. The green spheres will represent molecules of uranium hexafluoride (UF6) containing uranium-235 and the blue spheres molecules of UF6 containing uranium-238 (in practice, the uranium being enriched is part of the compound UF6 and not elemental uranium).
References:
http://www.epa.gov/radiation/radionuclides/uranium.htm
http://www.nrc.gov/materials/fuel-cycle-fac/ur-enrichment.html
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<head>
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<body>
<ol>
<li>
<font face="Verdana" size="3">Click Run and observe the motion of the
atoms for 5-10 seconds. At this point the centrifuge has <b>not</b>
been turned on. </font>
</li>
<li>
<font size="3" face="Verdana">Now move the "Speed of Centrifuge"
slider to the right to apply a force caused by the spinning
centrifuge. Observe what occurs once you have moved the slider all the
way to the right (full speed). Observe for at least 20 seconds and
then click Stop. </font>
</li>
<li>
<font size="3" face="Verdana">Take a snapshot of the model (to take a
snapshot, right-click inside the simulator and select Take a Snapshot).</font>
</li>
</ol>
</body>
</html>
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<head>
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<body>
Which isotope was pulled closer to the wall of the test tube once the
centrifuge was turned on?
</body>
</html>
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uranium-235
uranium-238
neither was closer to the wall then the other
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