Scintillation properties of Dy-doped TeO₂–Al₂O₃–BaO glasses

Abstract

We investigated photoluminescence (PL) and scintillation properties of Dy-doped tellurite glasses [80TeO 2 5Al 2 O 3 (15 ¹ x)BaOxDy 2 O 3 (x = 0.10.5)]. The Dy-doped tellurite glasses were prepared by the conventional melt-quenching method. In PL, all the Dy-doped tellurite glasses showed sharp emission peaks at approximately 575, 660 and 755 nm originated from the 4f4f transition of Dy 3+. The 0.5 and 1.0 % Dy-doped tellurite glasses exhibited high PL intensities under 450 nm excitation light. In scintillation, the Dy-doped tellurite glasses showed emissions peaking at approximately 485, 585 and 665 nm due to the 4f4f transitions of Dy 3+ , and the 1.0 % Dydoped tellurite glass exhibited the highest scintillation intensity. Furthermore, the PL and scintillation decay time constants of the Dy-doped tellurite glasses were about 12.6367 and 30.2248¯s, respectively. Theses decay time constants were typical values for the 4f4f transition of Dy 3+. In addition, the Dy-doped tellurite glasses showed moderate afterglow levels of about 289751 ppm, and the afterglow level of the 1.0 % Dy-doped tellurite glass (289 ppm) was almost comparable to that of a commonly used inorganic scintillator Tl-doped CsI.

Scintillation characteristics of Nd3+-doped BaO–Al2O3–TeO2 glasses

“…Compared with the past studies on the rare-earth ion-doped TeO 2 glasses, the QY values of the Nd 3+ -doped TeO 2 glasses were lower than those of the Eu 3+ -doped BaO-Al 2 O 3 -TeO 2 glasses, but higher than that of the Dy 3+ -doped BaO-Al 2 O 3 -TeO 2 glasses. 12,24) The PL decay time profiles of the Nd 3+ -doped BaO-Al 2 O 3 -TeO 2 glasses are presented in Fig. 5.…”

Radiation Response Characteristics of Pr3+-activated SrO–Al2O3–TeO2 Glasses

“…(31) Moreover, the decrease in the decay time with increasing Pr 2 O 3 concentration might be due to concentration quenching, and strong concentration quenching should occur in 1.0PSAT in particular because its decay time was much shorter than the typical decay time for the 4f-4f transitions of Pr 3+ . (17)…”

“…In addition, it might be possible to suppress their non-radiative decay since their phonon energy is lower than that of other glasses (e.g., phosphate glasses, borate glasses, and silicate glasses); therefore, they might exhibit higher PL and scintillation intensity. (13)(14)(15)(16)(17)(18) So far, several tellurite glasses such as Nd 3+ -activated 15WO 3 -5Al 2 O 3 -80TeO 2 glasses, Eu 3+ -activated 15BaO-5Al 2 O 3 -80TeO 2 glasses, Dy 3+ -activated 15BaO-5Al 2 O 3 -80TeO 2 glasses, and Eu 3+ -activated 10SrO-5Al 2 O 3 -85TeO 2 glasses have been studied as possible radiation detectors. (15)(16)(17)(18) In this paper, we focus on Pr 3+ -activated tellurite glasses.…”

“…(13)(14)(15)(16)(17)(18) So far, several tellurite glasses such as Nd 3+ -activated 15WO 3 -5Al 2 O 3 -80TeO 2 glasses, Eu 3+ -activated 15BaO-5Al 2 O 3 -80TeO 2 glasses, Dy 3+ -activated 15BaO-5Al 2 O 3 -80TeO 2 glasses, and Eu 3+ -activated 10SrO-5Al 2 O 3 -85TeO 2 glasses have been studied as possible radiation detectors. (15)(16)(17)(18) In this paper, we focus on Pr 3+ -activated tellurite glasses. Pr 3+ ions have been widely used as luminescence centers because Pr 3+ -activated materials such as Pr 3+ -activated Gd 2 O 2 S can exhibit efficient luminescence originating from the 4f-4f transitions of Pr 3+ .…”

Optical and Scintillation Properties of Eu-doped CsBr–BaBr2–ZnBr2 Glasses

“…To date, the scintillation properties of oxide glasses have been studied by many researchers, (25)(26)(27)(28)(29)(30)(31) whereas those of non-oxide glasses have not been studied extensively. Recently, there have been a few reports on the scintillation properties of non-oxide glasses such as AEF 2 -Al 2 O 3 -B 2 O 3 (AE = Ca, Sr, Ba), (32)(33)(34) (35) CeCl 3 -CsCl-CsPO 3 -Al(PO 3 ) 3 , (36) and CsCl-BaCl 2 -ZnCl 2 .…”