Supplier for Gamma Shield Material

["Crowley, George M." <gmcrowley@tva.gov>]

We have managed to contaminate one of our gamma detector shields.  We
believe we can just replace the copper liner and we'll be back in business.
There is a piece of cadmium on the back of the copper that we should replace
with tin to get around the toxicity issues.  Does anyone know of a supplier
that could provide me with a sheet of copper and tin that we could then fab
to fit our shield?


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