[ntp:questions] Re: Use of "Atomic Clock" Nomenclature
Richard B. Gilbert
rgilbert88 at comcast.net
Fri Jan 20 17:33:45 UTC 2006
fm at nowhere.invalid wrote:
>Ulrich Windl <Ulrich.Windl at rz.uni-regensburg.de> wrote:
>
>
>>"Max Power" <mikehack at u.washington.edu> writes:
>>
>>
>
>
>
>>>Use of "Atomic Clock" Nomenclature
>>>
>>>
><snip>
>
>It seems that Cs clocks are now forbidden to fly
>because cs133 is highly flamable (or even does it
>burn spontaneously ?) in the ambiant air.
>
>
>
Cesium belongs to the same chemical family as Sodium and Potassium. It
will burn spontaneously when exposed to air and/or water! I would be
surprised, however, if the amount of cesium in a cesium beam tube were
sufficient to be serious problem. And if I were shipping a cesium beam
tube or an entire cesium clock by air, I would take extreme care in
packing it. I'm told that the cheapest cesium clocks cost about $40,000 US.
More information about the questions
mailing list