NEGATIVE, NO, HELL NO.
--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.
Solve the differential equations.
The opinions expressed are strictly mine.
It's not about dose, it's about trust.
Curies forever.
Bill Lipton
liptonw@dteenergy.com