[time-nuts] Why Cesium and Rubidium only

2007-07-27 Thread Don Collie
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Please excuse my ignorance [I marvel/wonder at some of the essotevric comments on this group], but why are atomic clocks reliant on these two rare elements? - why not mercury, or water vapor, they are a lot easier to find.

Re: [time-nuts] Why Cesium and Rubidium only

2007-07-27 Thread Dr Bruce Griffiths
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Don Collie wrote: Please excuse my ignorance [I marvel/wonder at some of the essotevric comments on this group], but why are atomic clocks reliant on these two rare elements? - why not mercury, or water vapor, they are a lot

Re: [time-nuts] Why Cesium and Rubidium only

2007-07-27 Thread Dr Bruce Griffiths
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Bob Paddock wrote: On Friday 27 July 2007 04:14, Dr Bruce Griffiths wrote: 22GHz, (15GHz) (~40.5 GHz) than either the caesium (9.192GHz) or rubidium (6.8GHz) Anything happening in the THz range, that anyone

Re: [time-nuts] Why Cesium and Rubidium only

2007-07-27 Thread Bob Paddock
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] On Friday 27 July 2007 04:14, Dr Bruce Griffiths wrote: 22GHz, (15GHz) (~40.5 GHz) than either the caesium (9.192GHz) or rubidium (6.8GHz) Anything happening in the THz range, that anyone knows of? --