Year
2016
Abstract
Safeguards applications, control of fissile materials and warhead verification all rely or will likely rely to a certain extent on neutron multiplicity measurements. To im- prove, develop, and evaluate measurement techniques, it is important to have reliable simula- tion tools. Beyond the technical properties of a tool, it is also beneficial if it were open source Software. This allows for easier access, but also for increased participation in development. A neutron multiplicity simulation routine based on Geant4, an open source Monte Carlo frame- work, has been developed over recent years. It includes appropriate particle sources including a special treatment for (a, n) reactions, particle transport in the problem and analysis of the resulting pulsetrain data. To examine the capabilities of the Geant4 tool and the validity of the results, we compare them with MCNPX-PoliMi simulations in order to discuss the benefits and limitations of the Geant4 tool.