Optimization of Ce Content in CexLa1-xF3 Colloidal Nanocrystals for Gamma Radiation Detection

2009 ◽  
Vol 1164 ◽  
Author(s):  
Nathan J Withers ◽  
Krishnaprasad Sankar ◽  
John B Plumley ◽  
Brian A Akins ◽  
Tosifa A Memon ◽  
...  
Keyword(s):  
Steady State ◽  
Optical Absorption ◽  
Gamma Radiation ◽  
Radiation Detection ◽  
Colloidal Nanocrystals ◽  
Experimental Investigations ◽  
Lanthanum Fluoride ◽  
Lifetime Measurements ◽  
X Ray ◽  
Ce Content

AbstractWe report on experimental investigations of CexLa1-xF3 colloidal nanocrystals (CNCs) and their properties in function of Ce content. The CNCs were characterized by TEM, energy-dispersive X-ray spectroscopy (EDS), steady-state UV-VIS optical absorption and photoluminescence (PL) spectroscopy, and by PL lifetime measurements. We also report on observations of scintillation from the cerium-doped lanthanum fluoride CNC material in experiments on radiation detection.

Proton Transfer to Melamine Crosslinkers in X-Ray Chemically Amplified Negative Resists Studied by Time-Resolved and Steady-State Optical Absorption Measurement

1996 ◽  
Vol 35 (Part 1, No. 12B) ◽  
pp. 6491-6494 ◽  
Author(s):  
Seiji Nagahara ◽  
Yoshio Yamashita ◽  
Takao Taguchi ◽  
Takahiro Kozawa ◽  
Yoichi Yoshida ◽  
...  
Keyword(s):  
Steady State ◽  
Optical Absorption ◽  
Proton Transfer ◽  
Absorption Measurement ◽  
Time Resolved ◽  
X Ray ◽  
Optical Absorption Measurement ◽  
Chemically Amplified

OPTICAL ABSORPTION OF SOLID NEON AND ARGON IN THE SOFT X-RAY REGION

1971 ◽  
Vol 32 (C4) ◽  
pp. C4-236-C4-240 ◽  
Author(s):  
R. HAENSEL ◽  
G. KEITEL ◽  
N. KOSUCH ◽  
U. NIELSEN ◽  
P. SCHREIBER
Keyword(s):  
Optical Absorption ◽  
X Ray

Study of Heptamethine Iodide and Heptamethine PF6 Solutions in Different Solvents for the Measurement of Low Doses of X-Ray & Gamma Radiation

2016 ◽  
Vol 5 (4) ◽  
pp. 308-317
Author(s):  
Hagos Tesfay ◽  
Erika S. Bronze-Uhle ◽  
Augusto Batagin-Neto ◽  
Anna C. Véron ◽  
Thomas Geiger ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Low Doses ◽  
X Ray

scholarly journals Phase Relations in the ZrO2-MgO-FeOx System: Experimental Data and Assessment of Thermodynamic Parameters

2021 ◽  
Author(s):  
Ivan Saenko ◽  
O. Fabrichnaya
Keyword(s):  
Electron Microscopy ◽  
Experimental Data ◽  
Solid Solution ◽  
Thermodynamic Parameters ◽  
Spinel Phase ◽  
Experimental Investigations ◽  
X Ray ◽  
Heat Treated ◽  
Preliminary Phase ◽  
Scanning Electron

AbstractThermodynamic parameters were assessed for the MgO–FeOx system and combined with already available descriptions of ZrO2-FeOx and ZrO2-MgO systems to calculate preliminary phase diagrams for planning experimental investigations. Samples of selected compositions were heat treated at 1523, 1673 and 1873 K and characterized using x-ray and scanning electron microscopy combined with energy dispersive x-ray spectroscopy (SEM/EDX). Experiments indicated extension of cubic ZrO2 solid solution into the ternary system at 1873 K (75 mol.% ZrO2, 10 mol.% FeOx and 15 mol.% MgO) and limited solubility of 4 mol.% ZrO2 in spinel phase. Based on the obtained results thermodynamic parameters of C-ZrO2 and spinel phase were optimized.

Energy Band Gap Studies of CdS Nanomaterials

2008 ◽  
Vol 3 ◽  
pp. 97-102 ◽  
Author(s):  
Dinu Patidar ◽  
K.S. Rathore ◽  
N.S. Saxena ◽  
Kananbala Sharma ◽  
T.P. Sharma
Keyword(s):  
Optical Absorption ◽  
Band Gap ◽  
Energy Band ◽  
Chemical Method ◽  
Optical Absorption Spectroscopy ◽  
Cds Nanoparticles ◽  
X Ray Diffraction ◽  
Energy Band Gap ◽  
X Ray ◽  
Simple Chemical

The CdS nanoparticles of different sizes are synthesized by a simple chemical method. Here, CdS nanoparticles are grown through the reaction of solution of different concentration of CdCl2 with H2S. X-ray diffraction pattern confirms nano nature of CdS and has been used to determine the size of particle. Optical absorption spectroscopy is used to measure the energy band gap of these nanomaterials by using Tauc relation. Energy band gap ranging between 3.12 eV to 2.47 eV have been obtained for the samples containing the nanoparticles in the range of 2.3 to 6.0 nm size. A correlation between the band gap and size of the nanoparticles is also established.

pH Influences on Optical Absorption of Anthocyanin from Black Rice as Sensitizer for Dye Sensitized Solar Cell TiO2 Nanoparticles

2016 ◽  
Vol 864 ◽  
pp. 154-158
Author(s):  
Mariya Al Qibtiya ◽  
Eka Cahya Prima ◽  
Brian Yuliarto ◽  
Suyatman
Keyword(s):  
Solar Cell ◽  
Optical Absorption ◽  
Dye Sensitized Solar Cell ◽  
Black Rice ◽  
X Ray ◽  
Dye Sensitized ◽  
Current Voltage ◽  
Average Grain Size ◽  
Uv Visible

Natural dyes extracted from black rice are used as sensitizer for dye sensitized solar cell. The anthocyanin extracted with various pH in acidic and neutral coditions. Preparation of fotolectrode TiO2 film using doctor blade method and resulting average grain size 33,9 nm using X-Ray Diffractometer. Characterization of morphology and cross-section film TiO2 is confirmed by Scanning Electron microscopy (SEM). Optical absorption using UV-Visible Spectroscopy to obtain spectrum absorbance of anthocyanin in various pH. The current-voltage (J-V) characterization shows the performance DSSC have a match relation to the optical absorption. The best absorption of anthocyanin obtained at pH 6 as well as conversion efficiency reaches 2.26% at this pH condition.

Conducting Polymer/Silicon Heterojunction Diode for Gamma Radiation Detection

2002 ◽  
Vol 101 (1) ◽  
pp. 85-88 ◽  
Author(s):  
J. M. G. Laranjeira ◽  
H. J. Khoury ◽  
W. M. de Azevedo ◽  
E. F. da Silva ◽  
E. A. de Vasconcelos
Keyword(s):  
Gamma Radiation ◽  
Conducting Polymer ◽  
Radiation Detection ◽  
Heterojunction Diode

scholarly journals Protein Dynamics in an Intermediate State of Myoglobin: Optical Absorption, Resonance Raman Spectroscopy, and X-Ray Structure Analysis

2000 ◽  
Vol 78 (4) ◽  
pp. 2081-2092 ◽  
Author(s):  
Niklas Engler ◽  
Andreas Ostermann ◽  
Alexandra Gassmann ◽  
Don C. Lamb ◽  
Valeri E. Prusakov ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Optical Absorption ◽  
Protein Dynamics ◽  
Structure Analysis ◽  
Intermediate State ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
X Ray ◽  
Absorption Resonance

Luminescence Studies on Low Temperature Synthesized ZnGa2O4:Ln3+ (Ln = Tb and Eu) Nanoparticles

2008 ◽  
Vol 8 (11) ◽  
pp. 5776-5780 ◽  
Author(s):  
C. Manikyala Rao ◽  
V. Sudarsan ◽  
R. S. Ningthoujam ◽  
U. K. Gautam ◽  
R. K. Vatsa ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Oleic Acid ◽  
Steady State ◽  
Low Temperature ◽  
Ethylene Glycol ◽  
Urea Hydrolysis ◽  
Lanthanide Ions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Broad Emission

ZnGa2O4 nanoparticles doped with lanthanide ions (Tb3+ and Eu3+) were prepared at a low temperature of 120 °C based on urea hydrolysis in ethylene glycol medium. X-ray diffraction studies have confirmed that strain associated with nanoparticles changes as Tb3+ gets incorporated in the ZnGa2O4 lattice. Based on steady state emission and excitation studies of ZnGa2O4:Tb nanoparticles, it has been inferred that ZnGa2O4 host is characterized by a broad emission around 427 nm and there exists energy transfer between the host and Tb3+ ions. Unlike this, for ZnGa2O4:Eu nanoparticles, very poor energy transfer between the host and Eu3+ ions is observed. These nanoparticles when coated with ligands like oleic acid results in their improved dispersion in organic solvents like chloroform and dichloromethane.

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