Yes, the radius is around that. I have done similar study by varying thickness of the shell and compared with just core. I could see a systematic behavior and estimated the strain using shell peak (deconvoluted) by W-H analysis. But one of my friend asked me to check the applicability of this analysis to core shell since they are in comparable size.
In my opinion, if both are in same size, may be core also might undergo strain and that can be measured by using core peak. Since i'm using shell peak to estimate the strain in shell there shouldn't be any problem. May be I shouldn't say that the strain measured from shell is total strain in the nanowire. Am I right Dr.Artur ?