Development of room-temperature semiconductor gamma-ray detectors with very high detection efficiency Keitaro Hitomi and Mitsuhiro Nogami ABSTRACT In this study, room-temperature semiconductor gamma-ray detectors with very high detection efficiency were developed from a compound semiconductor, thallium bromide (TlBr). A 1-cm-thick TlBr detector was fabricated from a TlBr crystal grown by the traveling molten zone method using a zone-purified material. The TlBr gamma-ray detector fabricated from

Nagoya University Accelerator-based Neutron Source (NUANS) Sachiko Yoshihashi and NUANS group INTRODUCTION Boron neutron capture therapy (BNCT) is the most attention radiotherapy that can individually destroy cancer cells based on the 10B(n, a)7Li reaction between boron and neutrons. Research reactors were previously used as a neutron source for BNCT, but most research reactors have already closed or are in the process of shutting down. Accordingly, in lieu of research reactors, several acceler