After a couple of hours of searching I cant find the absorpion spectrum of nitrogen in UV-Vis range (350-450 nm is what im looking for).

Could anybody be so nice as to help me out?

To specify I'm talking about molecular nitrogen.

-G. Wesseling


I'm sorry for any broken or incorrect english, I'm still learning.

  • $\begingroup$ @CountTo10 I googled for about 2 hours including some image searches, but all I could find were sectra of NO2 and not N2. Now I will admit I'm not the best at using google so I is well in the realm of posibilities that I missed something. $\endgroup$ Commented Nov 29, 2016 at 14:43
  • $\begingroup$ Thanks for the hint, I'm quite new here and don't really understand everything yet. But I'm sure that will come with time. $\endgroup$ Commented Nov 29, 2016 at 14:56

1 Answer 1


Nitrogen is transparent in that region (up to vacuum-UV). A wavelength of 350 nm corresponds to 3.55 eV, much less than the ionization energy of N$_2$.

  • 1
    $\begingroup$ That could very well explain why I can't find any spectra. Thanks for the awnser. $\endgroup$ Commented Nov 29, 2016 at 14:46
  • $\begingroup$ @G.Wesseling Here is something (the green line), 120 to 190 nm. For longer wavelengths, there is no absorption. photonics.com/images/Web/Articles/2014/10/6/UV_Deuterium.png $\endgroup$
    – user137289
    Commented Nov 29, 2016 at 14:58
  • $\begingroup$ Does this mean you can ionize air with a deuterium lamp? $\endgroup$ Commented Mar 17, 2020 at 21:17
  • $\begingroup$ I would've preferred a graph. $\endgroup$
    – user86478
    Commented Sep 26, 2023 at 0:36

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