The European Spallation Source (ESS) is one of Europe’s biggest and most prestigious science projects. ESS will be the world’s most powerful next generation neutron spallation source for research with neutrons, providing a unique tool for studies of the atomic structure and dynamics of matter. In this paper we use GEANT4 simulations to investigate the effects of spallation target material and i...

The G4beamline program [1] is a useful and steadily improving tool to quickly and easily model beamlines and experimental equipment without user programming. Unlike most accelerator physics codes, it easily handles a wide range of materials and fields, being particularly well suited for the study of muon and neutrino facilities. As it is based on the Geant4 toolkit [2], G4beamline includes most...

Various models of anthropomorphic phantoms have been developed in the past decades for usage in Monte Carlo simulation for radiation protection and other medical physics applications; they adopt two alternative approaches, either modelling the body components through analytical geometrical representations or through voxelized geometries. An original system has been developed associated with the...

We present a detailed simulation of the performance of water Cerenkov detectors suitable for use in the Pierre Auger Observatory. Using geant4, a flexible object-oriented simulation program, including all known physics processes, has been developed. The program also allows interactive visualization, and can easily be modified for any experimental setup.

Hyogo Ion Beam Medical Center, 1-2-1, Kouto, Shingu-cho, Ibo-gun, Hyogo, 679-5165, Japan Toyama National College of Technology, 1-2 Ebie-Neriya, Imizu, Toyama, 933-0293, Japan University of California San Francisco, San Francisco, CA, 94143-1708, USA Ashikaga Institute of Technology, 268-1, Omae-cho, Ashikaga, Tochigi, 326-8558, Japan National Institute for Radiology Science, 4-9-1, Anagawa, In...

Simulations were performed with Geant4 to study the cosmogenics Li and He production by the interactions of the muons and their secondary shower particles in the liquid scintillator. The photonuclear reactions seem dominate their production. Their energy dependence were deduced. The results of the simulations are compared with available data. PACS: 05.10.Ln; 24.10.Lx; 25.20.-x; 25.30.Mr

4 Background and Rate Studies 12 4.1 Neutrons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.2 Photons and Low Energy Electrons . . . . . . . . . . . . . . . 13 4.3 A1 Background Rate Estimate . . . . . . . . . . . . . . . . . . 13 5 Simulation and Design 14 5.1 GEANT4 Simulation and Design Parameters . . . . . . . . . . 14 5.2 Physical Design . . . . . . . . . . . . . . . . ....

Nuclear power production can benefit from the development of more comprehensive alternatives for dealing with long-term radioactive waste. One such alternative is an accelerator-driven subcritical reactor (ADSR) which has been proposed for both energy production and for burning radioactive waste. Here we investigate the effects of the size of the ADSR spallation target on the total neutron yiel...

background: hadron therapy for malignant tumor is becoming increasingly popular. there are many factors which effect on implementation of a proper treatment planning. the purpose of this work is to investigate the inhomogeneity effects as affecting factor on proton range, full width at half maximum (fwhm) and 20% position of penumbra (p20) by mcnpx code. materials and methods: an inhomogeneous ...

Using simulations to understand backgrounds from muon-induced neutrons is important in designing next-generation low-background underground experiments. Validation of relevant physics within the Geant4 simulation package has been completed by comparing to data from two recent experiments. Verification focused on the production and propagation of neutrons at energies important to underground exp...