>If you need Beta shielding, I found a small business that makes ... >Their prices are pretty good ($65.00) for a 12" wide x 16" tall x 7.5" >deep traditional sheild. ... >Doug Weems >dweems@ehso.emory.edu You sure that's not 0.75" deep? Not many folks need over 7" of acrylic to stop betas! Accelerated electrons, maybe... Albert