Measurements and Calculations (Introduction to Radiochemistry)
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Revision as of 15:00, 2 July 2012 by Hansvl@uio.no (talk | contribs)
Which detector did you use?
Background
Note down the values from the background counting you started the day before.
Counting number Nbck= counts
Counting time tbck= sec
Counting speed = cps
Standard deviation = cps
Counting Efficiency
Do a one minute count on every shelf. Use these measurements to calculate the counting-efficiency of the GM-detector in %, for 234mPa. The activity of the sample can be calculated from the amount of UO3 used.
Counting number for each shelf (CPM) | Counting Efficency | |
1 | ||
2 | ||
3 | ||
4 |
Twenty Measurements with Constant Distance from the Source
Do twenty measurements on 1 minute with the source in the same position. Calculate the standard deviation and complete the table:
Nr | Np | ||