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Multi-gas barometric height formula in isotope separation devices?

"Gas Centrifuge Theory and Development: A Review of US Programs." Science and Global Security 17 (2009): 1-19. … The cited source gives the following equations for a two-isotope gas: $$ p_A(r) = p_A(0)\exp(M_A\omega^2r^2/(2RT))$$ $$ p_B(r) = p_B(0)\exp(M_B\omega^2r^2/(2RT))$$ A separation factor can be calculated …
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