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```python id="Rjxll-Sdchar"
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```
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# Helium-3 Detector Background Characterization
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From the plot above, it is unclear whether the background ditribution corresponds to a Poisson ditribution with a large $\lambda$ or a Gaussian distribution. Let us begin by attempting to fit the data to a Poisson distribution.
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From the plot above, it is unclear whether the background ditribution corresponds to a Poisson distribution with a large $\lambda$ or a Gaussian distribution. Let us begin by attempting to fit the data to a Poisson distribution.
The code above gives us a function to plot a histogram of He-3 counts along with a normal fit and a $Z\cdot \sigma$ band. Feel free o play around with the value of Z below to observe its effects on which counts are considered in our model
Similarly to above, feel free to play around with different values of $Z$ below. The only difference here is that we are considering a POisson fit to our background.
The different alues of $Z$ will lead to different considerations of what counts are "outliers". Again, feel free to play around with the different values of Z to observe the effect on our counting. The standard, as discussed above, will be $Z=3$.
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