-- Stefan E. Mueller Department of Information Services and Computing - Computational Science and Institute of Radiation Physics Helmholtz-Zentrum Dresden-Rossendorf Tel: +49 (0351) 260 3847 Stefan.Mueller_at_hzdr.de http://www.hzdr.de Vorstand: Prof. Dr. Sebastian M. Schmidt, Dr. Diana Stiller Vereinsregister: VR 1693 beim Amtsgericht Dresden On Thu, 7 Jan 2021: Dear fluka experts: do fluka have variance reduction tecnique of forced collision like in mcnp or phits? the tecnique like below: The forced collisions are used for improving tally statistics or thin target analysis by enlarging the collision probabilities. When specified particle comes into a region defined as the forced collision region, the particle is divided into two particles. One has a weight by (penetration probability) × (its weight), this particle pass through to the next region. The other has a weight of (1 - penetration probability) × (its weight), and it is forced to collide with a target in the region. The collision point is randomly determined according to cross sections. Regions and factors for the forced collisions can be defined in this section. Non-defined regions are set factor zero. if fluka have, how shauld i do? with best regards!
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