ASTRONOMY-HELP PLEASE!!!!!

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Equipment:   
  Geiger counter. 
  Laboratory emitters of alpha, beta and gamma radiation. 
  Substances which may or may not be emitters 
  Assorted possible radiation blocking material. 
Alpha Beta and Gamma emission have different penetrating powers.  Some substances will block all 
three, some will block two, some one and some none.  Some thicknesses will block some but not all of a 
particular type of radiation. 
Using the material listed above, design a method of determining if something emits alpha particles, beta 
particles, gamma radiation or some combination of these. 


What procedure would I use to answer this?

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