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Optimizing the Teflon thickness for fast neutron detection using a Ge detector

The optimum Teflon (C2F4)n thickness for fast neutron detection through the 19F(n,α)16N reaction was calculated and found to be ≈ 5.0 cm. Here, the 6.13 MeV γ ray emitted by 16N is assumed to be detected by a Ge diode. The geometry of the system is discussed and the γ line intensity was found to vary weakly with Teflon thickness.