Neutron Leakage Spectrum Study of Spallation Target of ADS

To study the neutron leakage spectrum of spallation target of ADS, the neutron leakage spectrum of leadbismuth eutectic target with 1 GeV proton was simulated by Geant4 toolkit. The simulated neutron leakage spectrum and target optimization parameters, which will be beneficial to the reactor core design, are obtained.