Comment by fsh
12 hours ago
The nuclear clock uses 229Th though which has an 8000 year half life and does not occur in nature at all.
12 hours ago
The nuclear clock uses 229Th though which has an 8000 year half life and does not occur in nature at all.
Yes, it is produced artificially in nuclear reactors, thus it is much more expensive than any natural isotope.
The amount used in a nuclear clock would be very small, but even so, its availability would be a problem.