FTIR measurements for structural probing of rare-earth sol-gel silica glass system co-doped with Al3+

2011 ◽  
Author(s):  
Wesam A. A. Twej ◽  
Baha T. Chiad ◽  
Abbas J. H. Al-Wattar ◽  
Firas J. Al-Maliki
Keyword(s):  
Rare Earth ◽  
Silica Glass ◽  
Sol Gel ◽  
Glass System ◽  
Co Doped

scholarly journals Cu/Ce-co-Doped Silica Glass as Radioluminescent Material for Ionizing Radiation Dosimetry

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2611
Author(s):  
Jessica Bahout ◽  
Youcef Ouerdane ◽  
Hicham El Hamzaoui ◽  
Géraud Bouwmans ◽  
Mohamed Bouazaoui ◽  
...  
Keyword(s):  
Dose Rate ◽  
Silica Glass ◽  
Energy Levels ◽  
Sol Gel ◽  
Radiation Detection ◽  
Optical Signal ◽  
X Ray ◽  
Dose Rates ◽  
Integrated Intensities ◽  
Co Doped

Optically activated glasses are essential to the development of new radiation detection systems. In this study, a bulk glassy rod co-doped with Cu and Ce ions, was prepared via the sol-gel technique and was drawn at about 2000 °C into a cylindrical capillary rod to evaluate its optical and radioluminescence properties. The sample showed optical absorption and photoluminescence (PL) bands attributed to Cu+ and Ce3+ ions. The presence of these two ions inside the host silica glass matrix was also confirmed using PL kinetics measurements. The X-ray dose rate was remotely monitored via the radioluminescence (RL) signal emitted by the Cu/Ce scintillating sensor. In order to transport the optical signal from the irradiation zone to the detection located in the instrumentation zone, an optical transport fiber was spliced to the sample under test. This RL signal exhibited a linear behavior regarding the dose rate in the range at least between 1.1 mGy(SiO2)/s and 34 Gy(SiO2)/s. In addition, a spectroscopic analysis of this RL signal at different dose rates revealed that the same energy levels attributed to Cu+ and Ce3+ ions are involved in both the RL mechanism and the PL phenomenon. Moreover, integrated intensities of the RL sub-bands related to both Cu+ and Ce3+ ions depend linearly on the dose rate at least in the investigated range from 102 mGy(SiO2)/s up to 4725 mGy(SiO2)/s. The presence of Ce3+ ions also reduces the formation of HC1 color centers after X-ray irradiation.

Anti-Stokes photoluminescence in Ga/Bi co-doped sol-gel silica glass

2015 ◽  
Vol 40 (7) ◽  
pp. 1591 ◽  
Author(s):  
Oleksii Laguta ◽  
Hicham El Hamzaoui ◽  
Mohamed Bouazaoui ◽  
Vladimir B. Arion ◽  
Igor Razdobreev
Keyword(s):  
Silica Glass ◽  
Sol Gel ◽  
Anti Stokes ◽  
Co Doped

Sol-Gel synthesis of an optical silica glass doped with rare-earth elements

2007 ◽  
Vol 33 (2) ◽  
pp. 152-155 ◽  
Author(s):  
N. N. Khimich ◽  
G. M. Berdichevskii ◽  
E. N. Poddenezhnyi ◽  
V. V. Golubkov ◽  
A. A. Boiko ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Silica Glass ◽  
Sol Gel ◽  
Sol Gel Synthesis

Rare-earth ion distribution in sol–gel glasses co-doped with Al3+

2008 ◽  
Vol 128 (5-6) ◽  
pp. 931-933 ◽  
Author(s):  
A.J. Silversmith ◽  
N.T.T. Nguyen ◽  
B.W. Sullivan ◽  
D.M. Boye ◽  
C. Ortiz ◽  
...  
Keyword(s):  
Rare Earth ◽  
Sol Gel ◽  
Ion Distribution ◽  
Rare Earth Ion ◽  
Gel Glasses ◽  
Co Doped

Rare-earth doped YF3 nanocrystals embedded in sol–gel silica glass matrix for white light generation

2010 ◽  
Vol 130 (12) ◽  
pp. 2508-2511 ◽  
Author(s):  
J. Méndez-Ramos ◽  
A. Santana-Alonso ◽  
A.C. Yanes ◽  
J. del-Castillo ◽  
V.D. Rodríguez
Keyword(s):  
Rare Earth ◽  
White Light ◽  
Silica Glass ◽  
Glass Matrix ◽  
Sol Gel ◽  
White Light Generation ◽  
Light Generation ◽  
Rare Earth Doped

scholarly journals Sol–gel preparation and white up-conversion luminescence in rare-earth doped PbF2 nanocrystals dissolved in silica glass

2009 ◽  
Vol 53 (3) ◽  
pp. 509-514 ◽  
Author(s):  
J. del-Castillo ◽  
A. C. Yanes ◽  
J. Méndez-Ramos ◽  
V. K. Tikhomirov ◽  
V. V. Moshchalkov ◽  
...  
Keyword(s):  
Rare Earth ◽  
Silica Glass ◽  
Sol Gel ◽  
Gel Preparation ◽  
Rare Earth Doped

Influence of co-dopant in the europium reduction in SrAl2O4host

2013 ◽  
Vol 21 (1) ◽  
pp. 143-148 ◽  
Author(s):  
Marcos V. dos S. Rezende ◽  
Paulo J. R. Montes ◽  
Felipe M. dos S. Soares ◽  
Claudiane dos Santos ◽  
Mário E. G. Valerio
Keyword(s):  
Rare Earth ◽  
Sol Gel ◽  
Reduction Process ◽  
Charge Compensation ◽  
Rare Earth Ions ◽  
Reduction Processes ◽  
Divalent State ◽  
Proposed Model ◽  
Co Doped ◽  
The Eu

Xerogels of strontium chlorate and aluminium chlorate doped with europium (un-co-doped) and co-doped with rare earth ions (Ln = Gd, Dy, Er and Y) were prepared using the proteic sol–gel route. Synchrotron radiation was used to investigate the effect of different co-dopants on the Eu3+→ Eu2+reduction process during the synthesis of the samples. Samples were excited at the EuLIII-edge and the XANES regions were analyzed. The results suggest that some of the Eu ions can be stabilized in the divalent state and that it is difficult to completely reduce Eu3+to Eu2+during thermal treatment. The mechanisms of the Eu reduction processes are explained by a proposed model based on the incorporation of charge-compensation defects.

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