A 4.5 μm PIN diamond diode for detecting slow neutrons

The response of a PIN diamond diode with a 4.5 μm thick i-layer to 𝛼-particles from a 210Po radioactive source has been measured and compared to the response from a 300 μm thick single crystal type IIa diamond. The results show that this PIN diamond diode with thin i-layer can be employed to detect slow neutrons following absorption on a converter boron layer. Such a detector will operate at low voltages and be rather insensitive to gamma background and neutron radiation damage.

Fig. 6. Pulse height distributions for the response to 4.5 MeV 𝛼-particles emitted from a sealed 210 Po radioactive source. The left histogram is for a 4.5 μmPIN-doped diamond diode. The right histogram is for an undoped 300 μm single crystal diamond.

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