Cos(Theta) between two correlated neutrons. Unpolarized case.

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Below is the energy spectrum of two correlated neutrons in LAB frame. 10 million events. Sampled up to 10 MeV.

Sum 2n energy correlated.png


Below is [math]cos(\Theta)[/math] between two correlated neutron. No energy cut was made. Integrated over all energy spectrum.

Cos theta 2n correlated.png


Below is [math]cos(\Theta)[/math] between two correlated neutron. Energy cut was made for each neutrons [math]E_n \gt 2\ MeV[/math]. Integrated over all energy spectrum.

Cos theta 2n correlated energy cut.png


[math]Asymmetry = \frac{2n\ \upuparrows}{2n\ \updownarrows}[/math]