Photo- and radio-excited luminescence properties of Eu-doped La 2O3-Al2O3 based eutectics

Yutaka Fujimoto; Kei Kamada; Takayuki Yanagida; Shingo Wakahara; Shotaro Suzuki; Shunsuke Kurosawa; Akira Yoshikawa

doi:10.1016/j.radmeas.2013.03.028

Photo- and radio-excited luminescence properties of Eu-doped La ₂O₃-Al₂O₃ based eutectics

Yutaka Fujimoto, Kei Kamada, Takayuki Yanagida, Shingo Wakahara, Shotaro Suzuki, Shunsuke Kurosawa, Akira Yoshikawa

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Eutectic crystal of 0.5% Eu-doped 30LaAlO₃-70Al ₂O₃ (vol %) was prepared by micro-pulling down (μ-PD) technique under nitrogen atmosphere. Being excited at a wavelength of 320 nm, the crystal exhibited intense emission band with a maximum at 450 nm which is corresponding to 4f⁶5d-4f⁷(⁸S_7/2) transitions of Eu²⁺. The decay time and fluorescence quantum efficiency (QE) were determined to be about 475 ns and 60%, respectively. When alpha-ray excited the crystal, both Eu²⁺ 4f⁶5d-4f ⁷(⁸S_7/2) and Eu³⁺ 4f ⁶-4f⁶ (⁵D₀-⁷F _1,2) emission peaks were observed at 435 nm and 600 nm. By the pulse height spectra, the relative scintillation light yield of the crystal was about 4% compared with that of BGO commercial scintillator.

Original language	English
Pages (from-to)	107-110
Number of pages	4
Journal	Radiation Measurements
Volume	56
DOIs	https://doi.org/10.1016/j.radmeas.2013.03.028
Publication status	Published - 2013 Jun 20

Keywords

Eu 5d-4f transition
Eutectic crystal
Micro-pulling down (μ-PD) technique
Scintillator

ASJC Scopus subject areas

Radiation
Instrumentation

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@article{758f32090d5f40a8873ba35d0d6b45d1,

title = "Photo- and radio-excited luminescence properties of Eu-doped La 2O3-Al2O3 based eutectics",

abstract = "Eutectic crystal of 0.5% Eu-doped 30LaAlO3-70Al 2O3 (vol %) was prepared by micro-pulling down (μ-PD) technique under nitrogen atmosphere. Being excited at a wavelength of 320 nm, the crystal exhibited intense emission band with a maximum at 450 nm which is corresponding to 4f65d-4f7(8S7/2) transitions of Eu2+. The decay time and fluorescence quantum efficiency (QE) were determined to be about 475 ns and 60%, respectively. When alpha-ray excited the crystal, both Eu2+ 4f65d-4f 7(8S7/2) and Eu3+ 4f 6-4f6 (5D0-7F 1,2) emission peaks were observed at 435 nm and 600 nm. By the pulse height spectra, the relative scintillation light yield of the crystal was about 4% compared with that of BGO commercial scintillator.",

keywords = "Eu 5d-4f transition, Eutectic crystal, Micro-pulling down (μ-PD) technique, Scintillator",

author = "Yutaka Fujimoto and Kei Kamada and Takayuki Yanagida and Shingo Wakahara and Shotaro Suzuki and Shunsuke Kurosawa and Akira Yoshikawa",

year = "2013",

month = jun,

day = "20",

doi = "10.1016/j.radmeas.2013.03.028",

language = "English",

volume = "56",

pages = "107--110",

journal = "Radiation Measurements",

issn = "1350-4487",

publisher = "Elsevier Limited",

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T1 - Photo- and radio-excited luminescence properties of Eu-doped La 2O3-Al2O3 based eutectics

AU - Fujimoto, Yutaka

AU - Kamada, Kei

AU - Yanagida, Takayuki

AU - Wakahara, Shingo

AU - Suzuki, Shotaro

AU - Kurosawa, Shunsuke

AU - Yoshikawa, Akira

PY - 2013/6/20

Y1 - 2013/6/20

N2 - Eutectic crystal of 0.5% Eu-doped 30LaAlO3-70Al 2O3 (vol %) was prepared by micro-pulling down (μ-PD) technique under nitrogen atmosphere. Being excited at a wavelength of 320 nm, the crystal exhibited intense emission band with a maximum at 450 nm which is corresponding to 4f65d-4f7(8S7/2) transitions of Eu2+. The decay time and fluorescence quantum efficiency (QE) were determined to be about 475 ns and 60%, respectively. When alpha-ray excited the crystal, both Eu2+ 4f65d-4f 7(8S7/2) and Eu3+ 4f 6-4f6 (5D0-7F 1,2) emission peaks were observed at 435 nm and 600 nm. By the pulse height spectra, the relative scintillation light yield of the crystal was about 4% compared with that of BGO commercial scintillator.

AB - Eutectic crystal of 0.5% Eu-doped 30LaAlO3-70Al 2O3 (vol %) was prepared by micro-pulling down (μ-PD) technique under nitrogen atmosphere. Being excited at a wavelength of 320 nm, the crystal exhibited intense emission band with a maximum at 450 nm which is corresponding to 4f65d-4f7(8S7/2) transitions of Eu2+. The decay time and fluorescence quantum efficiency (QE) were determined to be about 475 ns and 60%, respectively. When alpha-ray excited the crystal, both Eu2+ 4f65d-4f 7(8S7/2) and Eu3+ 4f 6-4f6 (5D0-7F 1,2) emission peaks were observed at 435 nm and 600 nm. By the pulse height spectra, the relative scintillation light yield of the crystal was about 4% compared with that of BGO commercial scintillator.

KW - Eu 5d-4f transition

KW - Eutectic crystal

KW - Micro-pulling down (μ-PD) technique

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