Fig. 1. (a) Device structure evaporated ⁶LiF; (b) photograph of nine neutron detectors mounted in the PCB with Au-plated contact by 25-μm gold wires. External ring contact (Ti/Al/Ni/Au) and internal circular contact (Ni/Au) were connected to the VCC and GND of the applied voltage, respectively. The dimensions in the picture are not drawn to scale.

Fig. 2. Neutron detection-system diagram using ORTEC modular pulse-processing electronic analyzer.

Fig. 3. The thermal neutron capture yield produced by fast neutrons captured with PE as a function of the thicknesses using GENT4.

Fig. 4. Thermal neutron detection efficiency as a function of the ⁶LiF converter thickness.

Fig. 5. The I–V characteristics of neutron detectors before and after deposition of ⁶LiF under various reverse bias voltages.

Fig. 6. Pulse-height spectrum of neutron detector irradiated by 5.48-MeV ²⁴¹Am alpha particles as a function of reverse bias voltages at room temperature.

Table 1. Pulse counts of neutron detector from pulse-counting board under different biases voltages.