Re: "A diagram of C23 basic types"

On 19/04/2025 22:15, Michael S wrote:

On Sat, 19 Apr 2025 17:15:42 +0200
David Brown <david.brown@hesbynett.no> wrote:
 

On 19/04/2025 09:46, Janis Papanagnou wrote:

On 17.04.2025 17:56, David Brown wrote:

But anyway, the newest breakthrough is thorium
nuclear clocks, which IIRC are 5 orders of magnitude more stable
than cesium clocks.  (And probably 5 orders of magnitude more
expensive...)

>
I've not heard of Thorium based clocks. But I've heard of
"optical clocks" that are developed to get more precise and
more stable versions of atomic clock times.
  

>
It was only last year that a good measurement of the resonant
frequencies of the Thorium 229 nucleus was achieved - the science bit
is done, now the engineering bit needs to be finished to get a
practical nuclear clock.
>
>

  Record my prediction: it's not going to happen.
 

I don't know enough about Thorium 229 nuclear resonances to be able to predict one way or the other.  Do you have a good reason or reference for your thoughts here?