Luminescence, scintillation and energy transfer in SiO.sub.2./sub.–Al.sub.2./sub.O.sub.3./sub.–B.sub.2./sub.O.sub.3./sub.–Gd.sub.2./sub.O.sub.3./sub.:Ce.sup.3+./sup., Pr.sup.3+./sup. glasses.

0482775 - FZÚ 2018 RIV DE eng J - Článek v odborném periodiku
Lertloypanyachai, P. - Chewpraditkul, W. - Pattanaboonmee, N. - Chen, D. - Babin, Vladimir - Beitlerová, Alena - Nikl, Martin
Luminescence, scintillation and energy transfer in SiO₂–Al₂O₃–B₂O₃–Gd₂O₃:Ce³⁺, Pr³⁺ glasses.
Physica Status Solidi A. Roč. 214, č. 9 (2017), s. 1-6, č. článku 1700072. ISSN 1862-6300. E-ISSN 1862-6319
Institucionální podpora: RVO:68378271
Klíčová slova: Ce3+ * energy transfer * luminescence * oxide glasses * Pr3+ * scintillation
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.795, rok: 2017

Ce3+,Pr3+-codoped SiO2–Al2O3–B2O3–Gd2O3 glasses (SABG: Ce,Pr) were prepared by melt quenching under a CO reducingatmosphere. Luminescence properties were investigated under UV and X-ray excitations. A dominant emission band at 430 nm belonging to the Ce3+:5d1-4f transition was observed in the photo- and radio-luminescence spectra. The energy transfer occurs fromthis Ce3+ band toward the 3PJ levels of Pr3+ with an efficiency of up to 24%, followed by the reduction of integrated luminescence intensity with an increasing Pr3+ concentration. This result is attributed to the increase in the reabsorption of Ce3+ luminescence and the non-radiative energy transfer toward the
3PJ levels of Pr3+. The cross-relaxation process within the Pr3+ pairs can further diminish the total luminescence yield at high Pr3+ concentrations. The integral scintillation efficiency and light yield measurements were carried out and compared to the reference Bi4Ge3O12 (BGO) crystal.
Trvalý link: http://hdl.handle.net/11104/0278153