Old steel

[CutlassCollector]

Originally Posted by Teisani

Thanks for this little interesting fact! Unfortunately, I have nothing to add, but at a first glance, it seems like a workable method.

One question would be "are reasonably priced instruments sensitive enough to detect these differences?"

That is interesting but like Teisani I wonder about suitable detectors.

We sometimes forget that radiation is a natural part of the environment.
There is even one known naturally occurring nuclear fission reactor at OKLO in Africa which has been running for millions of years.
Radon gas seeping into homes and the minor scare about radioactive granite kitchen worktops are other examples.

So old blades stored in granite houses may show traces as well from the natural environment as Jim has already suggested.