Difference between revisions of "LB Feb2017 Se Investigations"
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Since the constant term is inside of the exponent, we must exponentiate the constant to get the (efficiency uncorrected) Activity at t=0. | Since the constant term is inside of the exponent, we must exponentiate the constant to get the (efficiency uncorrected) Activity at t=0. | ||
| − | So the uncorrected activity at t=0 is 379.56 +\- | + | So the uncorrected activity at t=0 is 379.56 +\- 25.04 Hz. Using the Ba-133 87 keV efficiency at 3.9 cm away from the face of detector B, which is 0.17, the corrected activity can be found to be |
| + | |||
| + | 22327.06 +\- 1472.94 Hz which converts to 603.43 +\- 39.81 nCi | ||
[[PAA_Selenium]] | [[PAA_Selenium]] | ||
Revision as of 17:27, 7 April 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.
The half life was calculated using the program /data/IAC/Se/Feb2017Run/LB_WeightedFit.C
Using the slope, the half life can be found to be 58.9 +/- 11 minutes
Below is a plot of the data when it is exponentiated
Since the constant term is inside of the exponent, we must exponentiate the constant to get the (efficiency uncorrected) Activity at t=0.
So the uncorrected activity at t=0 is 379.56 +\- 25.04 Hz. Using the Ba-133 87 keV efficiency at 3.9 cm away from the face of detector B, which is 0.17, the corrected activity can be found to be
22327.06 +\- 1472.94 Hz which converts to 603.43 +\- 39.81 nCi