Radiation response properties of Dy-doped B2O3–Al2O3–SrO glasses

Naoki Kawano, Noriaki Kawaguchi, Go Okada, Yutaka Fujimoto, Takayuki Yanagida

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Borate glasses are considered to be host materials for thermoluminescent phosphors owing to their high thermally-stimulated luminescence (TSL) sensitivity and low effective atomic number. Herein, we fabricated the Dy-doped B2O3–Al2O3–SrO glasses to develop the phosphors for radiation dosimetry, and investigated their photoluminescence (PL), scintillation and TSL properties, systematically. The Dy-doped samples showed clear emission peaks at 480 and 570 nm due to 4f-4f transitions of Dy3+ in PL, and the 0.5 % Dy-doped sample exhibited the highest quantum efficiency of 0.24 under excitation wavelength of 350 nm among the sample tested. The decay time constants of the Dy-doped samples were 0.25–0.84 ms, which were typical values for the 4f-4f transition of Dy3+. In scintillation, the Dy-doped samples showed emissions with sharp peaks at 480 and 570 nm with the decay time constants of 0.51–0.86 ms due the 4f-4f transitions of Dy3+. The scintillation intensity of the 0.5 % Dy-doped sample was the highest among the samples investigated. Furthermore, the Dy-doped samples exhibited TSL with a main glow peak at approximately 90 °C after X-ray irradiation of 10,000 mGy, and the dynamic range of the 0.1–1.0 % Dy-doped samples was found to be 0.1–10,000 mGy.

Original languageEnglish
Article number165613
JournalOptik
Volume224
DOIs
Publication statusPublished - 2020 Dec

Keywords

  • Dosimeter
  • Dy
  • Scintillator
  • Strontium aluminoborate

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Radiation response properties of Dy-doped B<sub>2</sub>O<sub>3</sub>–Al<sub>2</sub>O<sub>3</sub>–SrO glasses'. Together they form a unique fingerprint.

Cite this