See Decay Rate . Secondly, one has to change the very nature of matter to change the decay rate. Changing on part of the formula changes the other parts. If the decay rate was accelerated at the Fall, then the heat and radiation would have killed all life. If there is a perfect creation, how can one have rapid decay at creation.
Creation is the very opposite of rapid decay.
Chapter Three Distribution of Radioactive Isotopes in the Earth by John R. Baumgardner Baumgardner posits that the enigma of the correlation between surface heat flow and the radioactivity of surfaces rocks is explained by accelerated decay. One does not need accelerated decay to explain this. Accelerated decay presents far more problems than it solves. Steven A. Austin Austin concludes that Grand Canyon rocks indicate significant discordance in ages. There have been many rocks tested showing concordance.