Measurements and Calculations (Introduction to Radiochemistry)

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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 [math]\frac{N_{bck}}{t_{bck}}[/math] = cps Standard deviation <math>\frac{\sqrt{N_{bck}}}{t_{bck}}= cps