Se170063 Nickel Foil Thin Gauss Window Expansion

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This analysis was done by weighting the histogram by the mass of the sample. The window is [1360,1365] and was expanded by one channel on each side to find the error in the counts.

5/25/17 5/26/17 5/27/17 5/29/17 5/30/17 5/31/17 6/1/17
Original Window Counts 92120
Original Window Background (Integrated) 12773.2
Original Window Difference 79346.8
Expanded Window Counts 95730
Expanded Window Background 921.179
Expanded Window Difference 94808.821
Error in counts 15462.021
Position 50 cm 30 cm 20cm 20 cm 10cm 10cm 10cm
Efficiency 0.00017 0.000422 0.000847 0.000847 0.0031 0.0031 0.0031
.dat file entry 14.25306628 +/- 0.1948663462


Below is a plot of the activity as a function of time

170063 Nickel WideGauss HLPlot.png

This gives the constant of 14.5046 +/- 0.00345043. Now find the initial activity

[math] A_t = e^{14.5046} = 1991900.96 Hz [/math]

Since the plot is made with reference to the mixture's measurement time (first point plotted 108 minutes after the mix was measured) means that the constant should be the activity at the time the mixture was being measured.