A still further advantage of my invention is that {HEAD ~ the radioactive gas} completely surrounds {TAIL ~ the phosphor particles}, thus causing light emission from 100 percent of the surface of said particles 
A still further advantage of my invention is that { HEAD ~ the radioactive gas } completely surrounds { TAIL ~ the phosphor particles } , thus causing light emission from 100 percent of the surface of said particles
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH