Radio-photoluminescence properties of samarium-doped alkaline earth sulfates

In this paper, we report radio-photoluminescence (RPL) properties of Sm-doped alkaline earth sulfates (CaSO4, SrSO4, and BaSO4) for possible applications in radiation measurements. The materials were prepared via solid state reaction by sintering at high temperature. By the conventional steady-state...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2020-03, Vol.466, p.56-60
Main Authors: Okada, Go, Hirasawa, Kazuki, Kusano, Eiji, Yanagida, Takayuki, Nanto, Hidehito
Format: Article
Language:English
Subjects:
BaSO4
CaSO4
Radio-photoluminescence
Samarium
SrSO4
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Summary:In this paper, we report radio-photoluminescence (RPL) properties of Sm-doped alkaline earth sulfates (CaSO4, SrSO4, and BaSO4) for possible applications in radiation measurements. The materials were prepared via solid state reaction by sintering at high temperature. By the conventional steady-state photoluminescence (PL) technique, it was confirmed that all these three types of materials show RPL, verified by comparing the PL spectra before and after X-ray irradiation. The luminescence of each irradiated material consists of emission features due to 5d-4f transitions and 4f-4f transitions of Sm2+, and the intensities increase with increasing the radiation dose. The sensitivity is the highest for CaSO4:Sm which is slightly less sensitive compared with a commercial RPL detector by a factor of approximately 5. The RPL response signal of CaSO4:Sm is notably stable, and no sign of fading is evident even after 20 times of readout.
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2020.01.020