Measurements and Calculations (Introduction to Radiochemistry)

Which detector did you use?

= Background

Note down the values from the background counting you started the day before.
Counting number N_bck= counts
Counting time t_bck= sec
Counting speed [math]\frac{N_{bck}}{t_{bck}}[/math] = cps
Standard deviation <math>\frac{\sqrt{N_{bck}}}{t_{bck}}= cps