[2H01-08] イメージング検出器

[2H02] Research on imaging based on cascade gamma-ray photons and magnetic fields

*Zhihong Zhong¹, Fumiki Sensui¹, Kenji Shimazoe¹, Hiroyuki Takahashi¹, Mizuki Uenomachi², Hideki Tomita³, Kei Kamada⁴ (1. UTokyo, 2. RIKEN, 3. Nagoya Univ., 4. Tohoku Univ.)

キーワード：cascade decay, magnetic field, perturbed angular correlation

The Perturbation Angular Correlation of radioactive nuclides with cascade gamma decay in magnetic field is studied. For example, In-111 would undergo a cascade decay before turning to the stable Cd-109, emitting two gamma photons consecutively. The angle between these two correlated photons is affected by the electro-magnetic field of the nucleus. In our experiment, the In-111 sample is placed inside the magnetic field with maximum strength of 2.5 T. By measuring the angle distribution and compute its time dependency, we clearly observe its relation with respect to magnetic field, which results from the nucleus’s perturbation in the field. With this being determined, we can use this principle for nuclear imaging in a magnetic field.