> Le 15 déc. 2017 à 14:06, Attila Kinali <[email protected]> a écrit : > > On Fri, 8 Dec 2017 09:40:29 -0800 > Tom McDermott <[email protected]> wrote: > >> Researchers at Oxford U. have fabricated an atomic reference based on >> a single nitrogen molecule inside a 60-atom carbon sphere ("Fullerene"). >> The cage of carbon isolates the nitrogen from external electric fields, >> and they've developed a method to also isolate it from external magnetic >> fields. > > The original paper in question is [1]. As with the nitrogen vacancy > clocks, which also trap nitrogen within a Carbon lattice, these have the > drawback of quite high temperature coefficients, Harding et al measured > 89ppm/K.
I wonder if Cs-133 can be inserted into C-60 fullerene? If it could, then a primary reference on a chip might be possible. > > Attila Kinali > > > [1] "Spin Resonance Clock Transition of the Endohedral Fullerene 15N@C60", > by Harding, Zhou, Zhou, Myers, Ardavan, Briggs, Porfyrakis, Laird, 2017 > https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.140801 > -- > It is upon moral qualities that a society is ultimately founded. All > the prosperity and technological sophistication in the world is of no > use without that foundation. > -- Miss Matheson, The Diamond Age, Neil Stephenson > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. "The power of accurate observation is commonly called cynicism by those who have not got it. » George Bernard Shaw _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
