Pre-Lab 13 Assignment: Radioactive Decay

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Radioactive Decay v 0.1 • small beaker Step 1: Open the Lab file Lab13 A 1 Step 2: Connect the radioactivity probe to the socket named Dig.1 in the Vernier adapter. Step 3: Point the measuring window to of the probe directly in front of the clean empty beaker. The probe will be collecting raw counts of the activity of the sample. These are the number of decays over a period of 5 seconds. Step 4: Start collecting your data. Run your experiment for two minutes and then stop. Step 5: In the axes below draw the graph you obtained in Step 4. Make sure to indicate the scale in the axes. Activity (counts) Time (s) Step 6: Using the analysis tools in the software determine the average activity in the lab and write your answer below: Background activity: . Question 3.1 Is the answer you obtained in agreement with the results obtained in Activity 2? If not, determine the probable causes for the difference. (note: In the plot the software gives a raw count that is taken over a period of 5 s. To obtain the activity you have to divide C by 5.) PHYS-204:Physics II Laboratory 9
Radioactive Decay v 0.1 Question 3.2 Is the background activity obtained in Question 3.1 in agreement with the number displayed in the window of the radioactivity probe? PHYS-204:Physics II Laboratory 10
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Pre-Lab 13 Assignment: Radioactive Decay

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