Path: ...!news.mixmin.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Bill Sloman <bill.sloman@ieee.org>
Newsgroups: sci.electronics.design
Subject: Re: OT: Atomic nucleus excited with laser: a breakthrough after
 decades
Date: Wed, 8 May 2024 15:36:32 +1000
Organization: A noiseless patient Spider
Lines: 42
Message-ID: <v1f318$3pn6g$1@dont-email.me>
References: <v1ccs5$3vg2$1@solani.org> <v1damh$39abm$1@dont-email.me>
 <v1ddj1$3a290$1@dont-email.me> <iokk3jt0njsobhf2v21i4b33cl28ee8706@4ax.com>
 <ljel3jdeon58rbh2vv60ae6v12qndhvj4i@4ax.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
Injection-Date: Wed, 08 May 2024 07:36:41 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="71f0ac8989164a455eb3ab27fc664d9e";
	logging-data="3988688"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX18wJULwVCyY+CsuhnFMgRvaPFbnMtXK/9o="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:1d0K19HRWdODUsnY+4cEHZE6rjw=
In-Reply-To: <ljel3jdeon58rbh2vv60ae6v12qndhvj4i@4ax.com>
Content-Language: en-US
Bytes: 3103

On 8/05/2024 9:36 am, John Larkin wrote:
> On Tue, 07 May 2024 12:17:24 -0400, Joe Gwinn <joegwinn@comcast.net> wrote: 
>> On Tue, 7 May 2024 16:26:27 +0200, Jeroen Belleman <jeroen@nospam.please> 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
>>>>>    <https://www.sciencedaily.com/releases/2024/04/240429103045.htm>
>>>>>     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.

Probably not. The technique to used to generate very precise laser 
wavelengths does seem to be difficult and demanding to work with.

The few people who can do it will have a field day, but they will only 
generate a few papers - it takes time to do the work and more time to 
write it up.
> They aren't tuning to a resonance, but to the difference between two
> close resonances.

Nuclear energy levels aren't "resonances" but quantum states, and the 
transition between them isn't a "resonance" either, though one can talk 
about the kind of resonance that would behave in a similar way.

-- 
Bill Sloman, Sydney