[oem7110]

I would like to know on following elements for Emission Spectra wavelength:

1) CO2
2) N2
3) O2
4) H2
5) He2
6) Sodium
7) Potassium

Does anyone have any suggestions on where to find them?
Thanks in advance for any suggestions

[mjc123]

I think you'll have difficulty finding He₂ anywhere.
NIST might be a good place to start. Or you could just google "sodium emission spectrum" etc. individually.

[Enthalpy]

For the elements, the
CRC Handbook of Chemistry and Physics
has a big table in the section "optical physics", not in "spectroscopy".

[oem7110]

CRC Handbook of Chemistry and Physics are required subscription for accessing information.

Do you have any suggestions on any free resource for this reference?
Thanks, to everyone very much for any suggestions (^v^)

[wildfyr]

The handbook can often be found in physical form in a library. Especially a University one.

[Corribus]

NIST Webbook has some spectral information for molecules, although most of it is Ro-Vib. E.g., here is a page on oxygen.

https://webbook.nist.gov/cgi/cbook.cgi?ID=C7782447&Units=SI&Mask=1000#Diatomic

Molecular emission data may have to be sleuthed individually. I'm not aware of any convenient, comprehensive tables freely available on the internet. Molecular emission is typically weak because of competitive dissociation and resultant atomic emission due to high energies of excitation. E.g., discharge into oxygen gas creates mostly emission from dissociated and excited oxygen atoms and ions. Molecular oxygen has a well-known emission from singlet state at around 760 nm (b¹Σ_g⁺) I think and another line at around 1.2-1.3 μm (a¹Δ_g) (Jeong et al, J. Phys. Chem. A 2000, 104, 8027). But this kind of information for different molecules may be difficult to find without access to primary literature.

I don't have my CRC handy to check what kind of tabulated information is provided in it.

[oem7110]

I would like to know on how to read it and get the different wavelength for oxygen.

Do you have any suggestions?
Thanks, to everyone very much for any suggestions (^v^)

[Enthalpy]

If you study chemistry, or physics, or engineering... you might consider buying your own copy of the CRC Hdbk of Chem & Phys. Used copies of older editions are more affordable.

Check for instance these items at Amazon.com:
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and these items at eBay.com:
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there are many more, over other sites too
https://www.alibris.com/CRC-Handbook-of-Chemistry-and-Physics-Lide/book/1380445
https://www.abebooks.com

[oem7110]

I find a copy in library for 2017-2018= 98th ed., and would like to know on which section / pages I should look for different element's wavelength spectrum.  If anyone have this reference, could you please provide which section / pages those information are located? so I get an idea on where to look for those information when I am in library.

Does anyone have any suggestions?
Thanks, to everyone very much for any suggestions (^v^)

[Enthalpy]

The book has an index.

[Arkcon]

If anyone have this reference, could you please provide which section / pages those information are located?

The book has an index.

And a table of contents.  But go ahead and flip through it, its all good stuff.

I know its not as sexy as instant Google results, but learning how to work with a monster refernce book, like this one, is part of learning.  Don't let this happen to you: http://www.chemicalforums.com/index.php?topic=93670.0

[oem7110]

I cannot find CO2 and OH within this reference.
Does anyone have any suggestions?
Thanks, to everyone very much for any suggestions (^v^)