Radioluminescence from Sm:CaI2 for Scintillator Applications
Sm-doped CaI 2 bulk crystals were synthesized by the vertical Bridgman method, and their photoluminescence and radioluminescence properties were systematically investigated.The samples exhibited a broad emission band centered around 870 nm, attributed to the 5d-4f transitions of Sm 2+ .Decay curve analysis revealed the presence of two distinct components: a fast decay component (~0.6 s) associated with self-trapped excitons, and a slow component (2-4 s) corresponding to Sm 2+ emission.These results suggest the potential applicability of Sm-doped CaI 2 crystals for photon-counting measurements in the NIR region.
Authors
- Daisuke Nakauchi
- Noriaki Kawaguchi
- Takayuki Yanagida
- Takumi Kato
Institutions
- Nara Institute of Science and Technology (JP)
Publication Details
- Journal
- Sensors and Materials
- Published
- 2026-02-05
- DOI
- https://doi.org/10.18494/sam6032
- Primary Topic
- Radiation Detection and Scintillator Technologies
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Research Center for Biomedical Engineering
- Research Foundation for the Electrotechnology of Chubu
- Japan Society for the Promotion of Science