{HEAD ~ Fluorescence emission} of {TAIL ~ iron} or cerium in glass is excited and imaged onto segmented detectors 
of
{ HEAD ~ Fluorescence emission } of { TAIL ~ iron } or cerium in glass is excited and imaged onto segmented detectors
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH