Equipment List:

1. Absorber Set
   
   

   • Storage Box
   • Needed Absorbers (Letter: Element - Thickness)
     
     

     • A: Al Foil - 0.7 mil
     • B: Al Foil - 1 mil
     • C: Poly - 4 mil
     • D: Poly - 8 mil
     • E: Plastic - 0.030
     • F: Plastic - 0.040
     • K: Al - 0.050
     • L: Al - 0.063
     • M: Al - 0.080
     • N: Al - 0.090
     • O: Al - 0.100
     • P: Al - 0.125
     • Q: Pb - 0.032
     • R: Pb - 0.064
     • S: Pb - 0.125
     • T: Pb - 0.250
   • Uneeded Absorbers (Letter: Element - Thickness)
     
     

     • G: Al - 0.020
     • H: Al - 0.025
     • I: Al - 0.032
     • J: Al - 0.040
2. Isotopes
   
   

   • ⁹⁰Sr (strontium - 90)
   • ²⁰⁴Tl (Thallium - 204)
   • ¹³⁷Cs (Cesium - 137)
3. Detector and Counter
   
   

   • ST360 Counter
   • BNC to BNC Cable
   • Guiger-Müller (GM) tube (only one output)
   • GM tube support and shelves
   • Plastic source holder
   • USB A to B Cord
4. Barium Generator Set up at the TA station:
   
   

   • Barium Source
   • Eluting Solution
   • Syringe
   • 1 Planchet per table per section needed, but kept at the TA station
   • Gloves
   • Paper Towels

General Class Use:

1. Human readable name in case of failure another item

Notes and tests:

• Plug the USB cord into the computer and the back of the ST360 Counter
• Plug the BNC Cable into the Guiger-Müller (GM) port (HAVE HENRY DOUBLE CHECK THIS) on the back of the ST360 counter and into the top of the GM tube.
• Turn on the ST360
• Open STX on the computer
• In the Setup menu select HV Setting then:
  • set the High Voltage to 700
  • set the Step Voltage to 20
  • set the Enable Step Voltage to On
• In the Preset Menu:
  • select Time then select 10
  • select Pause Time then type 0
  • select Number of Runs then type 25
• Click start (Green Diamond) and watch for the numbers to rise then plateau.
• Once the numbers start rising again, click stop.