Equipment List: 3 total setups

1. Sealed sodium iodide detector connected to a photomultiplier tube
2. 3/4" thick lead shield
3. Source set with eight sealed radioactive sources:
   • 137Cs
   • 90Sr
   • 204Tl
   • 60Co
4. Shelf assembly and plastic holder for sources
5. UCS20 Universal Computer Spectrometer control unit
6. Oscilloscope
7. Cables
   • Coaxial signal cable
   • High voltage cable

Notes and tests:

1. Test