Dose effects on the long persistent luminescence properties of beta irradiated SrAl2O4:Eu2+, Dy3+ phosphor

M. Pedroza-Montero; B. Castañeda; M. I. Gil-Tolano; O. Arellano-Tánori; R. Meléndrez; M. Barboza-Flores

doi:10.1016/j.radmeas.2009.12.046

Dose effects on the long persistent luminescence properties of beta irradiated SrAl₂O₄:Eu²⁺, Dy³⁺ phosphor

M. Pedroza-Montero^*, B. Castañeda, M. I. Gil-Tolano, O. Arellano-Tánori, R. Meléndrez, M. Barboza-Flores

^*Corresponding author for this work

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

7 Scopus citations

Abstract

The SrAl₂O₄:Eu²⁺, Dy³⁺ is a phosphor characterized by a long persistent luminescence (PLUM) when it is excited with UV-VIS light and ionizing radiation. In this paper, we study the PLUM behavior as a function of beta irradiation dose in the 0-650 Gy range with a fixed dose rate of 5 Gy/min. The PLUM intensity showed a complex decay behavior, exhibiting a near linear response in the 0-1.7 Gy low dose range and gradually increasing up to 160 Gy. The PLUM reached the saturation for higher doses (>275 Gy) with a slight decrease in the range of 300-650 Gy. In addition, a systematic PLUM enhancement was produced after a thermal cleaning procedure and irradiation at RT in a series of 10 cycles. The observed phenomenon may be related to a radiation-induced process of charge trapping accumulation, which is triggered by thermal stimulation during the irradiation stage. It improves the luminescent characteristics of SrAl₂O ₄:Eu²⁺, Dy³⁺ phosphors rendering them suitable for permanent display and illumination devices.

Original language	English
Pages (from-to)	311-313
Number of pages	3
Journal	Radiation Measurements
Volume	45
Issue number	3-6
DOIs	https://doi.org/10.1016/j.radmeas.2009.12.046
State	Published - Mar 2010

Bibliographical note

Funding Information:
The Universidad de Sonora (México) kindly acknowledges the transfer of the SrAl 2 O 4 :Eu 2+ , Dy 3+ PLP from University of Georgia. These phosphor materials are covered by US Patents 6117362 and 6267911 as well as others Pending Patent Applications assigned to the University of Georgia Research Foundation, Inc. In addition, the financial support from CONACyT (México) grants 83536, 82765 and SEP (México) is greatly acknowledged.

Keywords

Electron traps
Persistent luminescence phosphors
Strontium aluminate

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10.1016/j.radmeas.2009.12.046

Cite this

@article{84b26f65acfe4d309b9d6ba30aba2378,

title = "Dose effects on the long persistent luminescence properties of beta irradiated SrAl2O4:Eu2+, Dy3+ phosphor",

abstract = "The SrAl2O4:Eu2+, Dy3+ is a phosphor characterized by a long persistent luminescence (PLUM) when it is excited with UV-VIS light and ionizing radiation. In this paper, we study the PLUM behavior as a function of beta irradiation dose in the 0-650 Gy range with a fixed dose rate of 5 Gy/min. The PLUM intensity showed a complex decay behavior, exhibiting a near linear response in the 0-1.7 Gy low dose range and gradually increasing up to 160 Gy. The PLUM reached the saturation for higher doses (>275 Gy) with a slight decrease in the range of 300-650 Gy. In addition, a systematic PLUM enhancement was produced after a thermal cleaning procedure and irradiation at RT in a series of 10 cycles. The observed phenomenon may be related to a radiation-induced process of charge trapping accumulation, which is triggered by thermal stimulation during the irradiation stage. It improves the luminescent characteristics of SrAl2O 4:Eu2+, Dy3+ phosphors rendering them suitable for permanent display and illumination devices.",

keywords = "Electron traps, Persistent luminescence phosphors, Strontium aluminate",

author = "M. Pedroza-Montero and B. Casta{\~n}eda and Gil-Tolano, {M. I.} and O. Arellano-T{\'a}nori and R. Mel{\'e}ndrez and M. Barboza-Flores",

note = "Funding Information: The Universidad de Sonora (M{\'e}xico) kindly acknowledges the transfer of the SrAl 2 O 4 :Eu 2+ , Dy 3+ PLP from University of Georgia. These phosphor materials are covered by US Patents 6117362 and 6267911 as well as others Pending Patent Applications assigned to the University of Georgia Research Foundation, Inc. In addition, the financial support from CONACyT (M{\'e}xico) grants 83536, 82765 and SEP (M{\'e}xico) is greatly acknowledged.",

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AU - Pedroza-Montero, M.

AU - Castañeda, B.

AU - Gil-Tolano, M. I.

AU - Arellano-Tánori, O.

AU - Meléndrez, R.

AU - Barboza-Flores, M.

N1 - Funding Information: The Universidad de Sonora (México) kindly acknowledges the transfer of the SrAl 2 O 4 :Eu 2+ , Dy 3+ PLP from University of Georgia. These phosphor materials are covered by US Patents 6117362 and 6267911 as well as others Pending Patent Applications assigned to the University of Georgia Research Foundation, Inc. In addition, the financial support from CONACyT (México) grants 83536, 82765 and SEP (México) is greatly acknowledged.

PY - 2010/3

Y1 - 2010/3

N2 - The SrAl2O4:Eu2+, Dy3+ is a phosphor characterized by a long persistent luminescence (PLUM) when it is excited with UV-VIS light and ionizing radiation. In this paper, we study the PLUM behavior as a function of beta irradiation dose in the 0-650 Gy range with a fixed dose rate of 5 Gy/min. The PLUM intensity showed a complex decay behavior, exhibiting a near linear response in the 0-1.7 Gy low dose range and gradually increasing up to 160 Gy. The PLUM reached the saturation for higher doses (>275 Gy) with a slight decrease in the range of 300-650 Gy. In addition, a systematic PLUM enhancement was produced after a thermal cleaning procedure and irradiation at RT in a series of 10 cycles. The observed phenomenon may be related to a radiation-induced process of charge trapping accumulation, which is triggered by thermal stimulation during the irradiation stage. It improves the luminescent characteristics of SrAl2O 4:Eu2+, Dy3+ phosphors rendering them suitable for permanent display and illumination devices.

AB - The SrAl2O4:Eu2+, Dy3+ is a phosphor characterized by a long persistent luminescence (PLUM) when it is excited with UV-VIS light and ionizing radiation. In this paper, we study the PLUM behavior as a function of beta irradiation dose in the 0-650 Gy range with a fixed dose rate of 5 Gy/min. The PLUM intensity showed a complex decay behavior, exhibiting a near linear response in the 0-1.7 Gy low dose range and gradually increasing up to 160 Gy. The PLUM reached the saturation for higher doses (>275 Gy) with a slight decrease in the range of 300-650 Gy. In addition, a systematic PLUM enhancement was produced after a thermal cleaning procedure and irradiation at RT in a series of 10 cycles. The observed phenomenon may be related to a radiation-induced process of charge trapping accumulation, which is triggered by thermal stimulation during the irradiation stage. It improves the luminescent characteristics of SrAl2O 4:Eu2+, Dy3+ phosphors rendering them suitable for permanent display and illumination devices.

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