[time-nuts] Hyperfine splittings

Magnus Danielson cfmd at bredband.net
Wed Nov 8 03:35:09 EST 2006


From: "Tom Van Baak" <tvb at leapsecond.com>
Subject: Re: [time-nuts] Hyperfine splittings
Date: Tue, 7 Nov 2006 18:43:52 -0800
Message-ID: <001401c702df$c8f1c980$f5988843 at computer>

> > Hi!
> >
> > I have collected some hyperfine splittings into a table with references.
> > I was reminded of this when asked offlist for the Rubidium splitting
> frequency.
> > Naturally, I would welcome feedback and contributions of both better
> resolution
> > measures as well as more isotopes.
> >
> > http://rubidium.dyndns.org/~magnus/physics/hyperfine/
> 
> Magnus,
> 
> Nice page.

Thanks. I put it up since I could not find anything like it. It has been
unlisted since I wanted to build it up first. Ah well.

> I have 1 420 405 751.768 ± 0.002 Hz for
> hydrogen at my "hyperfine" page:
> 
> http://www.leapsecond.com/pages/unix/

Yes, but do you have a reference for that one? Preferably an open source.

> Also, for a a fresh Hg199+ reference see:
> 
> Laser-Cooled Mercury Ion Frequency Standard
> D.J. Berkeland, J.D. Miller, J.C. Bergquist, W.M. Itano, and D.J. Wineland
> Phys. Rev. Lett. 80, 2089-2092 (1998)
> http://prola.aps.org/abstract/PRL/v80/i10/p2089_1
> http://www.tf.nist.gov/timefreq/general/pdf/1225.pdf

Ah, thanks!

Cheers,
Magnus



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