1. May 23, 2008 #1

   prochatz

   

   Hello.
   
   I was wondering what's the purpose of using Thallium (Tl) in Iodine Sodium (NaI) scintillators.

    

   prochatz, May 23, 2008
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3. May 23, 2008 #2

   Ed Aboud

   

   Sodium iodide (NaI) in its pure
   state can detect gamma rays only at very low temperatures. By adding a small
   amount of Thallium metal to the crystal (about 0.01%), the crystal can detect
   gamma rays or nuclear particles at much higher temperatures.

    

   Ed Aboud, May 23, 2008

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