[1M05-08] Photon Measurement 1

[1M07] Prototype development of sphere Compton imaging system with GFAG scintillators

*Agus Nur Rachman¹, Kenji Shimazoe¹, Hiroyuki Takahashi ¹, Yusuke Tamura², Hideki Tomita³, Hanwool Woo¹, Kei Kamada², Fumihiko Ishida⁴, Eiiji Takada⁴, Kosuke Tanabe⁵ (1. The University Of Tokyo, 2. Tohoku University , 3. Nagoya University, 4. National Institute of Technology Toyama, 5. National Research Institute of Police Science)

Keywords:Sphere detector, Gamma-ray imaging , GAFG crystal

The 4-phi gamma-ray imaging is useful to find the location of radiative materials in a random position and can be used for various environmental applications. The sphere Compton imaging system will provide a 360-degree viewpoint range to detect the gamma-ray with quantitative values. The detector equipped with GAFG crystal, which has a short decay time (40-55ns) and high density (6.7g/cm3). The high density of the GAFG crystal will increase the probability of gamma ray interaction and more efficient in stopping the gamma-ray. The short decay time allows us to measure the Time of Flight (TOF) that will provide useful information on photon interaction in the sphere detector. We will show the prototype experimental results of designed sphere Compton camera.