Do radiometric dating problems
Researchers will need to evaluate samples individually, then apply the relevant physics accordingly."It's a pain in the neck, but it will make our estimates significantly more accurate," Hayes says.An oversight in a radioisotope dating technique used to date everything from meteorites to geologic samples means that scientists have likely overestimated the age of many samples, according to new research from North Carolina State University.To conduct radioisotope dating, scientists evaluate the concentration of isotopes in a material.When it comes to determining the age of stuff scientists dig out of the ground, whether fossil or artifact, “there are good dates and bad dates and ugly dates,” says paleoanthropologist John Shea of Stony Brook University.
The ratios of strontium-86 to rubidium and strontium-87 are thought to only be influenced by the radioactive decay of the rubidium-87 into strontium-87."If we don't account for differential mass diffusion, we really have no idea how accurate a radioisotope date actually is.It's worth noting that the issues raised here do not apply to carbon dating, which does not utilize isotopic ratios." North Carolina State University.The current model of radioisotope dating is based on that idea.But that model doesn't account for differential mass diffusion -- the tendency of different atoms to diffuse though a material at different rates.