Where Can I Find a Reliable Source for Electron Energy Values?

[kel]

Hi

I'm in the middle of writing up the Frank-Hertz experiment as part of my lab module this year, but I'm having trouble finding a 'reliable' website that I can use to quote the electron energy value (ie 4.9eV).

I'm afraid my lecturer refuses to acknowledge wikipedia as a good source.

So, even though I have the value that I need, could anyone suggest a website that I can use as a source for this info - and therefore for future work.

Cheers
Kel

 

[ZapperZ]

http://hyperphysics.phy-astr.gsu.edu/hbase/FrHz.html#disc

Zz.