Path: Xl.tags.giganews.com!local-1.nntp.ord.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail NNTP-Posting-Date: Tue, 07 May 2024 23:37:49 +0000 From: John Larkin Newsgroups: sci.electronics.design Subject: Re: OT: Atomic nucleus excited with laser: a breakthrough after decades Date: Tue, 07 May 2024 16:36:04 -0700 Organization: Highland Tech Reply-To: xx@yy.com Message-ID: References: X-Newsreader: Forte Agent 3.1/32.783 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Lines: 35 X-Trace: sv3-1NJJqvJqZ4WXAaCcNMXWVmhFXH0mWWL4GD6eOrNkqBwp9HuCE/I/3o1ltmF25E6eo/HBvtH8UfofTl4!Gr/7uT/L/ZvTaI0pTMyIV2tjXNsNpYOdnFOWPd0Fx8zjDAJ/7L+2KSQD+Wv69Lyqu3y5yno0QD6T!KntnLA== X-Complaints-To: www.supernews.com/docs/abuse.html X-DMCA-Complaints-To: www.supernews.com/docs/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 2526 On Tue, 07 May 2024 12:17:24 -0400, Joe Gwinn wrote: >On Tue, 7 May 2024 16:26:27 +0200, Jeroen Belleman > wrote: > >>On 5/7/24 15:35, Martin Brown wrote: >>> On 07/05/2024 06:06, Jan Panteltje wrote: >>>> Atomic nucleus excited with laser: a breakthrough after decades >>>>   >>>>    The 'thorium transition', which has been sought after for decades, >>>>    has now been excited for the first time with lasers. >>>>    This paves the way for revolutionary high precision technologies, >>>> including nuclear clocks >>> >>> I wonder what the Q value for stimulated nuclear emission is? >>> >> >>They state a centre frequency of roughly 2 PHz and a decay time >>of 630s, which would put the Q in the 1e19 ballpark. Prodigious. >>No wonder it was hard to find. > >The Time guys have been looking for this forever, so to speak. > >It's the only atomic kernel transition with any degree of coupling to >electromagnetic radiation. This will be orders of magnitude better >than such as lattice clocks. > >There will be a flood of papers. > >Joe Gwinn They aren't tuning to a resonance, but to the difference between two close resonances.