Using uranium 238 in radiometric dating
In the same way, one U atom is unpredictable, but a sample containing many millions of U atoms will be very predictable.What happens statistically is that half of the available atoms will have decayed in a given period, specific to each radioactive species, called the half-life.It turns out that this rate of diffusion of helium is compatible with the crystals being about 5, years old, not 1.Although assumptions 2 and 3 are not provable, they actually seem very likely in this particular example.If the assumptions cannot be trusted, then the calculations based on them are unsound.It is for this reason that creationists question radiometric dating methods and do not accept their results.
It needs to be remembered that observational science can only measure things in the here-and-now, in a manner which can be repeated.
Remember that the half-life is a statistical measure. In order to calculate the age of the rock, we need three other pieces of information: We need to know how fast the U turns into Pb The half-life gives us this value, provided the half-life has never altered during the lifetime of the zircon crystal.
We need to know how much Pb there was in the original rock. It is usually assumed, without justification, that the original quantity of Pb in the rock was zero.
By Eric Hovind on September 19, in Articles , Intermediate Radiometric dating is a much misunderstood phenomenon.
Evolutionists often misunderstand the method, assuming it gives a definite age for tested samples.
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So what do the observational scientists in the radiometric dating lab do?