Erik Max Francis wrote: > A couple of problems here. 1 eV = 1.602 x 10^-19 J. Also, the > atto-prefix is 10^-18, not 10^-15. So 511 keV = 81.9 fJ > (femtojoules). Miscount on my side; thanks for pointing that out. Regards, Björn -- BOFH excuse #330: quantum decoherence