[1M07-12] 量子ビーム利用

[1M12] Demonstration of Isotope CT Using NRF Absorption Method in UVSOR-BL1U

*Khaled Ali¹, Hideaki Ohgaki¹, Heishun Zen¹, Toshiteru Kii¹, Takehito Hayakawa², Toshiyuki SHIZUMA², Hiroyuki Toyokawa³, Yoshitaka Taira³, Calin Alexandru Ur⁴, Violeta Iancu⁴ (1. Kyoto Univ., 2. QST, 3. AIST, 4. ELI-NP )

キーワード：Nuclear resonance fluorescence (NRF), Computed Tomography (CT), Laser Compton Gamma-ray Beam, Isotope Distribution

By combining the Computed Tomography (CT) technique and Nuclear Resonance Fluorescence (NRF) absorption method (NRF-CT), an isotope specific CT image could be obtained. We have already obtained an isotope-specific CT image of ²⁰⁸Pb in the CT target consisted of a natural lead rod, an iron rod, and vacancy in an aluminum cylinder shielded by an iron cylinder in the BL1U of UVSOR facility. To obtain a higher resolution image and to examine the capability of isotope identification, the CT target was changed to three lead rods with a natural lead, an enriched ²⁰⁸Pb, and an enriched ²⁰⁶Pb put into a bismuth cylinder. The NRF-CT image of ²⁰⁸Pb obtained by the experiment will be discussed.