Modularized NaI(Tl) detectors in a half barrel configuration

Masaaki Kobayashi,Shin'ichi Kurokawa,Minoru Takasaki,Takeo Fujitani,Hiroyuki Kusumoto,Tsunehiko Omori,Shojiro Sugimoto,Masahiko Ueda,Yoshitake Yamaguchi,Jun'ichiro Iwahori,Hajime Yoshida,Fujio Takeutchi,Masami Chiba

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment（1986）

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摘要

We have constructed a modularized array of NaI(Tl) detectors in a half barrel configuration that is about 75 cm long with an inner radius of 25 cm. 96 NaI modules are surrounded by a layer of 48 modules of scintillating glass which have similar dimensions to the NaI modules. Each NaI crystal was shaped as a trapezoidal pyramid and encapsulated in a 1 mm thick aluminium container with dimensions of (43 × 94) × (110 × 94) × 377 mm3. The construction and performance are described along with the gain calibration and monitoring, the beam position sensitivity, the scattering between modules, etc. The fwhm energy resolution of a 5 × 5 array of NaI modules varied from 6.5% for incident electrons at 100 MeV to 3.6% at 1000 MeV

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