放射線シミュレ一ションのためのツ一ルキットGeant4

摘要

Geant4 is a software toolkit for simulating interactions between particles and matter. The Geant4 collaboration develops and maintains it. The Japanese group played a very important role even before the beginning of the collaboration. The history, unwritten background information and the recent status of Geant4 are described in the Japanese developers' point of view.