[2C05-09] ビーム利用・計測

[2C09] Evaluation of the gamma-ray CT image resolution by LCS gamma-ray beam in UVSOR-III

*Khaled Ali^1,2, Hideaki Ohgaki¹, Heishun Zen¹, Toshiteru Kii¹, Takehito Hayakawa^3,4, Toshiyuki Shizuma³, Hiroyuki Toyokawa⁵, Masaki Fujimoto⁶, Yoshitaka Taira⁶, Masahiro Katoh^6,7 (1. Kyoto University, 2. SVU University, 3. QST , 4. Osaka University, 5. AIST , 6. UVSOR, 7. Hiroshima University)

キーワード：Computed tomography (CT), laser Compton scattering (LCS) gamma-ray, non-destructive inspection (NDI)

We measured a three-dimensional computed tomography (CT) gamma ray image with a pixel resolution of 1 mm using the laser Compton Scattering (LCS) gamma-ray beam available at the beamline BL1U in the UVSOR-III facility for a sample contains a set of different concealed materials. The LCS gamma-ray beam had a 1 mm beam size at the lead collimator and a flux density of 0.7 photons/s/eV at a maximum energy of 5,528 MeV with 1.1% energy bandwidth in FWHM. We evaluate the gamma-CT image resolution from the current experimental set-up in the UVSOR-III facility. The influence on the obtained image resolution of the LCS beam divergence, scattering gamma-rays from collimator, and so on will be presented.