What is the isolated spectral line?

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SUMMARY

The term "isolated spectral line" refers to a single emission line that is not influenced or overlapped by other spectral lines. In the discussion, the He I 501.6 nm line is identified as not being isolated due to the presence of a forbidden component at 504.2 nm. The concept of an isolated line is confirmed to hold true when line broadening is minimal or when the 504.2 nm line is absent, allowing the 501.6 nm line to stand alone.

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【help】what is the isolated spectral line?

Hi, there. Could anyone please tell me the definition of the "isolated spectral line"?
A paper (http://pra.aps.org/abstract/PRA/v44/i10/p6785_1) said: He I 501.6 nm line is not an isolated one, it has a forbidden component (504.2 nm)...
Thank you
 
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An 'isolated line' just means that its a single emission line, by itself, without being overlapped / influenced by another line. Thus, this author is stating that there is another line overlapping with this one.

In particular, the line at 504.2 is a 'forbidden line', which just means that its being produced by a somewhat exotic process.
 


Thank you Zhermes. So is it correct that when the line broadening is not significant, or when the 504.2 line doesn't appear, the 501.6 line is still an "isolated line"?
 


Yup, absolutely!
 


thanks！
 

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