Creation ministries radiometric dating
Thus it would seem decay rates have been the same for at least the past 169,000 years.This gives considerable confidence that the decay rates, and the physical constants that determine them, have not changed perceptibly.Therefore, support for radiometric dating is virtually universal in the scientific community.
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Radiometric dating requires that the decay rates of the isotopes involved be accurately known, and that there is confidence that these decay rates are constant. The physical constants (nucleon masses, fine structure constant) involved in radioactive decay are well characterized, and the processes are well understood.
Careful astronomical observations show that the constants have not changed significantly in billions of years—spectral lines from distant galaxies would have shifted perceptibly if these constants had changed.
There are a few effects that can alter radioactive half-lives, but they are mostly well understood, and in any case would not materially affect the radiometric dating results.
That is, the analysis of the isotopic and chemical composition of the sample has far greater uncertainty than any uncertainty in the decay rate itself.
There is another effect that takes place in the "electron capture" type of Beta decay.
This is an example of the Weak force, and is fairly rare.
Electron capture requires that there be an electron in the vicinity of the nucleus, so its activity depends strongly on the configuration of the electron cloud, which depends on the chemical state.
In fact, it is possible to shut down electron capture completely—simply ionize the substance so that there are no electrons nearby.
One key assumption is that the initial quantity of the parent element can be determined.Tags: Adult Dating, affair dating, sex dating