What is the isolated spectral line?

[ada_ada_2002]

【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

 

[zhermes]

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.

 

[ada_ada_2002]

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"?

 

[zhermes]

Yup, absolutely!

 

[ada_ada_2002]

thanks！