Re: [neonixie-l] Re: Green glow in gas

Mon, 13 Jan 2014 10:45:33 -0800

It appears that this glow is actually on the INSIDE SURFACE of the glass envelope of the tube. It is therefore most likely, in my opinion, a fluorescence, occuring on the glass itself from internal electron bombardment. This same exact phenomena occurs on the INSIDE SURFACE of many electron tubes, for the same reason, but is normally a blueish color, NOT to be confused with a gassy tube, where the bluish glow would be between the internal elements rather than on the inside glass surface. That's my two cents worth. Ira. 



On 1/13/2014 10:35 AM, [email protected] wrote:

OK, here's a pic of the mysterious green glow I sometimes see in my 
5092 nixie tube. It's towards the rear of the tube. Krypton has some 
green spectral lines, so maybe this tube has trace-amounts of Kr-86 to 
reduce ionization time. But after 50 years I would expect all of it 
would be gone considering it has a 10-year half-life.


I just wish I could find a way to create a nixie with this color.


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