Fig. 1. Experimental flow chart

Fig. 2. Curves of current gain h_FEvs collector current I_C of A-NPN BJTs

Fig. 3. Curves of current gain h_FEvs collector current I_C of B-PNP BJTs

Fig. 4. Diagram of electron flow and hole flow when NPN transistor is working in positive active region

Fig. 5. Curves of base current I_B vs. collector current I_C of A-NPN BJTs and B-PNP BJTs

Fig. 6. Schematic diagram of irradiation effect of neutron first followed by γ incidence (taking PNP bipolar transistor as an example)

Fig. 7. Schematic diagram of irradiation effect of γ first followed by neutron incidence ( taking PNP bipolar transistor as an example)