Difference between revisions of "LB Feb2017 Se Investigations"

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[[File:Se81 Metastable 103keV overlay.png|200px]]
 
[[File:Se81 Metastable 103keV overlay.png|200px]]
  
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An attempt to extract the half life from this energy line is outlined below:
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The half life was calculated using the program /data/IAC/Se/Feb2017Run/LB_WeightedFit.C
  
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1)Within the region of interest, fit the energy line with a Gaussian fit.
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[[File:Se81 MetaStable HalfLife.png|200px]]
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2)Once the mean, standard deviation, and the constant have been found, feed those into a custom fit function of the form [3]+[0]*TMath::Gaus(x,[1],[2],1) where [0],[1], and [2] are the constant, mean, and the standard deviation of the original Gaussian fit respectively and [3] is a p0 fit to the background.
 
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3)Once the background is found, set parameter [3] to zero and integrate the custom Gaussian over the whole window of interest.
 

Revision as of 22:05, 9 March 2017

Neutron knockout on Se-82

While looking to see if certain lines are indeed selenium within the spectrum, it is worth noting that there are 2 states for Se-81. There is a metastable state with a 57 minute half life and a gamma emission of 103 keV. First I will attempt to show that this metastable state can indeed be seen in the spectrum.

Below is an overlay of 5 plots with different cuts in time.

Se81 Metastable 103keV overlay.png

The half life was calculated using the program /data/IAC/Se/Feb2017Run/LB_WeightedFit.C

Se81 MetaStable HalfLife.png

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