{HEAD ~ The scintillator} uses {TAIL ~ a material} which exhibits improved performance with respect to the strength in light emission and to the speed in attenuation, and further is relatively easy in the growth of its crystal 
uses
{ HEAD ~ The scintillator } uses { TAIL ~ a material } which exhibits improved performance with respect to the strength in light emission and to the speed in attenuation , and further is relatively easy in the growth of its crystal
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH