RIKEN accelerator progress report 2005, vol. 39

This issue of RIKEN Accelerator Progress Report reports on progress of accelerator-based research activities in the RIKEN Accelerator Research Facility (RARF) up to October 2005. The research programs involve a variety of fields such as experimental and theoretical nuclear physics, nuclear chemistry, radiation biology, atomic physics, condensed matter physics, plant mutation, material characterization, application to space science, accelerator physics and engineering, laser technology, and computational technology in terms of accelerator or radiation application. These activities involved a few hundred researchers from domestic and foreign institutions together with laboratories and Centers in RIKEN. (J.P.N.)