{HEAD ~ Tritium} is {TAIL ~ a soft beta emitter} and the radiation will not penetrate the glass wall of the envelope 
is
{ HEAD ~ Tritium } is { TAIL ~ a soft beta emitter } and the radiation will not penetrate the glass wall of the envelope
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH