Development of Gd2O3 based dense scintillating glass

Combined electromagnetic and hadron calorimeter based on a total absorption principle using scintillating crystals has been proposed recently for the future ILC. Advances in low level photon counting technology, including the silicon photo-multipliers, make such kind of calorimeters possible. Searching for a suitable calorimeter media that is dense and inexpensive is critical-Scintillating glass is an attractive option for the total absorption calorimeter. We report the progress of developing the Gd 2 O 3 based dense scintillating glass. Scintillation properties of glass samples such as such as emission spectrum and decay time are shown. The scintillation photon yields are compared with a reference PbWO 4 crystal that was produced by Shanghai Ceramic Institute.