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The circular plane target exposured by the source is very common in experimental nuclear physics, radioactivebiology, radiation protection, and instrument graduation. But the flux formula is lacked. The source and thetarget are shown in Fig.1.We had adopt
The circular plane target exposured by the source is very common in experimental nuclear physics, radioactive biology, radiation protection, and instrument graduation. But the flux formula is lacked. The source and the target are shown in Fig.1. We had adopt