RE: chains in equillibrium

[BERNARD L COHEN <blc+@PITT.EDU>]

On Thu, 31 Oct 2002, Baratta, Edmond J wrote:



> There is an 'old' article in ANALYTICAL CHEMISTRY BY H. R. Kirby, Volume 26,

> No. 6, June, 1954 pp 1065-1071 that has all the equations for Uranium-238,

> Uranium-235 and Thorium-232.



	--There is nothing complicated about this. Equilibrium means that

each member of the chain decays at the same rate as it is formed. Since

this applies to each member of the chain, they all must decay at the same

rate. You need complicated equations only before equilibrium is reached.



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