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Monte Carlo transport code Geant4 has been successfully utilised to study of neutron-induced fission reaction for Th in the transport neutrons generated from H(d,n)He neutron source. The purpose of this work is to examine the applicability of Monte Carlo simulations for the computation of fission reaction process. For this, Monte Carlo simulates and calculates the characteristics of fission reaction process of Th(n,f), such as the fission yields distribution, kinetic energy distribution, fission neutron spectrum and decay γ-ray spectrum. This is the first time to simulate the process of neutron-induced fission reaction using Geant4 code. Typical computational results of neutron-induced fission reaction of Th(n,f) reaction are presented. The computational results are compared with the previous experimental data and evaluated nuclear data to confirm the certain physical process model in Geant4 of scientific rationality. [ABSTRACT FROM AUTHOR]

Two-proton relative momentum distributions from the break-up channels Al→p+p+Na and Mg→p+p+Ne at an energy of 60-70 A MeV have been measured together with two-proton opening angles at the projectile fragment separator beamline (RIPS) in the RIKEN Ring Cyclotron Facility. The results demonstrate the existence of diproton emission component from single-step He for highly excited Al and Mg. [ABSTRACT FROM AUTHOR]