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The beam line of the ISOL system passes through the shielding wall and connects the HI-13 tandem accelerator.Neutron produced by tandem accelerator will affect the area of BRIF through the beam line.To protect the staff in BRIF area from radiation a shielding design of the beam line is carried out.The neutron source in the vault of tandem accelerator is the H.E Faraday cup of HI-13 tandem accelerator as showed in Fig.1.The Faraday cup is consisted of 1 mm molybdenum sheet and 10 mm
The beam line of the ISOL system passes through the shielding wall and connects the HI-13 tandem accelerator. Neutron produced by tandem accelerator will affect the area of BRIF through the beam line. Protect the staff in BRIF area from radiation a shielding design of the beam line is carried out. The neutron source in the vault of tandem accelerator is the HE Faraday cup of HI-13 tandem accelerator as showed in Fig.1. The Faraday cup is consisted of 1 mm molybdenum sheet and 10 mm