Sensing Device Laboratory(Material function analysis and evaluation)
Education and Research Activities in the Laboratory
1. Measurements of ionizing radiations (for example, X-rays, γ-rays, charged particles and neutrons) using scintillators and dosimeters are our main focus of research.
2. Key areas of our studies are radiation physics, inorganic luminescent materials and photo-physics. It is preferable if the prospective student has a good understanding of physics described in the textbooks below.
・Solid state physics: Introduction to Solid State Physics (C. Kittel)
・Basic quantum mechanics: Principles of Quantum Mechanics (P. A. M. Dirac)
3. In our group, students are exposed to a wide range of experiments every day, and they learn and achieve experimental techniques to measure various ionizing radiations using inorganic phosphor materials. Typically, these phosphors (inorganic single crystals, ceramics and glasses) can be synthesized in the lab, and a variety of radiation-induced effects are characterized over a wide range of optical regions from VUV to NIR over a wide temperature range, 4-800 K. Successful students may be involved in collaborative research with major university and industrial partners in Japan and overseas.
We synthesize inorganic crystal, ceramic and glass scintillators and characterize the fundamental scintillation properties. Successful materials will be further studied for state-of-the-art detectors.
As for scintillator research, we synthesize inorganic crystals, ceramics and glasses for novel dosimeter materials. Our facilities offer comprehensive studies of different types of dosimetry. (OSL, TSL, and RPL)
Besides radiation measurements, we also develop other types of phosphor materials, e.g., long persistent luminescence and stress luminescence.
Promising samples are further advanced to develop detector instruments for medical, security and high energy physics applications.
Explanatory Pictures of Research Activities
- Fig.1 Crystal, ceramic, and glass
materials under UV excitation
- Fig.2 Outline of studies in this group, from material synthesis to radiation detectors
Recent Research Papers and Achievements
1. Study of rare-earth-doped scintillators, T. Yanagida, Opt. Mat., 35 1987-1992 (2013).
2. Comparative study of ceramic and single crystal Ce:GAGG scintillator, T. Yanagida, K. Kamada, Y. Fujimoto, H. Yagi, T. Yanagitani, Opt. Mat.,35 2480-2485 (2013).
3. Development of X-ray induced afterglow characterization system, T. Yanagida, Y. Fujimoto, T. Ito, K. Uchiyama, K. Mori, Appl. Phys. Exp., 7 062401 (2014).