Division of Materials Science, NAIST

Mr. Prom Kantuptim (a M2 student) of the Sensing Device Laboratory was given a Poster Award of JSAP Ionization Radiation Division at the 80th Autumn Meeting of the Japan Society of Applied Physics.

Mr. Prom Kantuptim (a M2 student) of the Sensing Device Laboratory was given a Poster Award of JSAP Ionization Radiation Division at the 80th Autumn Meeting of the Japan Society of Applied Physics. The 80th JSAP Autumn Meeting was held in Hokkaido, Japan on September 18-21, 2019. The 94 posters were nominated and 9 were awarded for excellent.

Award recipients list: https://annex.jsap.or.jp/radiation/prize3.html

Optical and Scintillation properties of Pr-doped Lu2Si2O7 single crystals by the floating zone method

Prom Kantuptim(M2), Masaki Akatsuka(D1), Noriaki Kawaguchi(Associate Professor), Takayuki Yanagida(Professor)

I would like to deeply gratitude for Prof. Yanagida and Assoc. Prof. Kawaguchi. This work could not succeed without their guidance. In addition, I would like to sincerely thank all the members in the Sensing device laboratory, including Mr. Akatsuka for his special support. This award will be a massive motivation for me in future research.

Pr doped Lutetium pyrosilicate Lu2Si2O7 (LPS) single crystals were synthesized by the floating zone method with different Pr concentration from 0.1% to 2.0%. After the confirmation of the phase by powder XRD patterns, optical and scintillation properties were investigated. When we observed photoluminescence (PL) emission spectra, emission due to 5d-4f transition of Pr3+ appeared in all the samples at the wavelength of 300-340 nm, and PL decay times were similar around 9-11 ns in all the samples. In scintillation properties, under the X-ray excitation, all the samples had the same scintillation emission spectral shape with different emission intensities, and scintillation decay times were around 18-21 ns. Under 137Cs γ-rays irradiation, the 1.0% Pr doped sample showed the highest scintillation light yield among the present samples, and the value was 9700 ph/MeV. Furthermore, linearity and energy resolution as a function of γ-ray energy were observed.

 

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