Wikipedia:Peer review/Deuterium arc lamp/archive1

Deuterium arc lamp

This is a peer review request not intended to ready the article for featured status but rather to validate my notations to the image of the spectrum of a deuterium arc lamp included with this article. I would specifically like to know if my marking of the location of the "fulcher band" is correct. I am pretty sure of the locations of the molecular continuum and balmer lines but not really sure of the emission band at 560 to 640nm and would very much like to hear from a physicist or chemist familliar with this phenomenon. I have posted the question to the science refrence desk but nobody there seems to know.--Deglr6328 18:59, 30 September 2006 (UTC)

Not sure if you will find someone here after asking at the reference desk but looking through page histories of Deuterium I found User:Kdliss who claims to be a physician so you might want to contact him. - Tutmosis 20:59, 30 September 2006 (UTC)

This is in no way my specialty, so don't take my word for it, but AFAIK the Fulcher-alpha band should be about 600nm, so it looks like you're in the right place. I wasn't aware it would be so spread out - for example, here are some data on H2 that are all in the 600-630 range for the various transitions (table II). But their "expansion" figure (fig 3) showing the Fulcher region is 590-650nm, which is more consistent with your annotation (though not performed under remotely similar conditions). Opabinia regalis 06:03, 1 October 2006 (UTC)

Thanks very much for both of your inputs! Yes I have seen that paper and I remember seeing that spectrum (if I recall it was the lowest reaching spectrum of the band that I found anywhere) but looking at where it appears to slope down to 0 at about 590nm (though obviously I can't be certain that's where it really ends) that would mean the isotopic shift for deuterium would have to be in excess of ~30nm since in my spectrum it cuts off at around 560nm! I just don't know if that's even possible. --Deglr6328 06:34, 1 October 2006 (UTC)

I think I may have found what I'm looking for [1]. Apparently this has all been known for ~100 years!! humbling.--Deglr6328 01:33, 2 October 2006 (UTC)