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