Detecting method of {HEAD ~ impurity concentration} in {TAIL ~ crystal}, method for producing single crystal and apparatus for the pull up of a single crystal 
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Detecting method of { HEAD ~ impurity concentration } in { TAIL ~ crystal } , method for producing single crystal and apparatus for the pull up of a single crystal
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH