How Do Muon Rate and Flux Depend on Detector Separation?

 

In this experiment the muon telescope (2 detectors) will be arranged to measure the vertical muon flux. The separation of the detectors will be changed in a systematic way to determine the effect on count rate and flux.   Before you come up with hypotheses for this experiment, you should be sure you understand how the terms rate and flux are different.

 

Procedure

You will need to do coincidence runs for a variety of separations of the paddles.  Remember to record the separation of the paddles, as well as counts and time for each run.  You will also need to take measurements so you can calculate the surface area of the scintillator portion of your paddles.

 

Analysis

Calculate the muon rate and the uncertainty in this rate for each separation of the paddles. You can then plot a graph of this count rate as a function of separation.

 

Next, calculate the flux at each separation.  Plot a graph of these flux values as a function of separation of the paddles.

 

What type of trends do you see in your two graphs?  Are these what you expected?  What logical explanation is there for your results?

 

Some experiments seem to show differences based on location (inside/outside, altitude.) This might be worth pursuing.