LB 170048 Nickel Foil Consistency Check

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Since the Selenium activities are not matching predicted values, check nickel foils from the front and rear to try and get that the activity is the same. Below is a table of pictures and information from ROOT sessions. For each of these, the spectrum was weighted by the inverse of the mass. For the front foil the mass was 1.3310g and for the rear foil the mass was 1.2196g.

To find the error in the background, the expanded window's background was subtracted from the original window's background. The signal was found by integrating the gaussian over the original window with an adjusted amplitude, which has been background subtracted and fed into mathematica.


5/23/17 5/26/17 5/29/17 5/30/17
Original Window 170048 003 FrontFoil Pos70 5 23 17.png 170048 003 FrontFoil Pos30 5 26 17.png 170048 003 FrontFoil Pos10 5 29 17.png 170048 003 FrontFoil Pos10 5 30 17.png
Expanded Window 170048 003 FrontFoil Pos70 ExpWindow 5 23 17.png 170048 003 FrontFoil Pos30 5 26 17 ExpWindow.png 170048 003 FrontFoil Pos10 5 29 17 ExpWindow.png 170048 003 FrontFoil Pos10 5 30 17 ExpWindow.png
Background 348.35 +/- 8.67
Gaussian Integral Over Original Window 12422.3 +/-
Difference 10245.05 +/-
.dat file entry
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