New Configurations of Single - Crystal Scintillator Detectors in SEM

There are two reasons for designing special geometrical configurations of detectors of signal electrons in EM.1. For some traditional shapes of scintillators (discs) the quantum efficiency of single crystal YAG or YAP scintillators amounting to 5% - 7% is not fully utilized for achieving the maximum light output signal propagated in the desired. The reason is the small critical angle given by the high index of refraction of both single crystal materials. The shaping of single crystal scintillators and treating of surfaces by making use of the laws of geometrical optics lead to an increase of the value of the light output signal propagated in the desired direction.2. Different kinds of information carried by signal electrons (especially BSEs) of different types must be collected by a detector of a specific geometrical shape placed in a suitable position with regard to the specimen.Non-traditional geometrical configurations and optical modifications of detectors have been designed to solve the problem of a more efficient propagation of light towards the photocathode of PMT, considering different types of signal electrons.

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Barium iodide single-crystal scintillator detectors

10.1117/12.738973 ◽

2007 ◽

Cited By ~ 6

Author(s):

Nerine J. Cherepy ◽

Giulia Hull ◽

Thomas R. Niedermayr ◽

Alexander Drobshoff ◽

Stephen A. Payne ◽

...

Keyword(s):

Single Crystal ◽

Barium Iodide ◽

Crystal Scintillator ◽

Scintillator Detectors ◽

Iodide Single Crystal

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INVESTIGATION OF HEATING EFFECT ON EFFICIENCY AND LIGHT OUTPUT OF POWERFUL SINGLE CRYSTAL LED SOURCES OF WHITE LIGHT WITH PHOTOLUMINOPHOR

Vestnik of Ryazan State Radio Engineering University ◽

10.21667/1995-4565-2020-71-209-219 ◽

2020 ◽

Vol 71 ◽

pp. 209-219

Author(s):

A. E. Chizhikov ◽

◽

M.I. Galitsyn ◽

Keyword(s):

Single Crystal ◽

White Light ◽

Light Output ◽

Heating Effect

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Activity 30: Critical Angle and Index of Refraction

Teaching About Geometric Optics: Teacher’s Notes ◽

10.1063/9780735422766_030 ◽

2020 ◽

pp. 1-8

Author(s):

Jane Bray Nelson ◽

Jim Nelson

Keyword(s):

Critical Angle ◽

Index Of Refraction

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Some Metal Ions Complexes Derived From Schiff Base Ligand with Anthranillic Acid: Preparation, Spectroscopic and Biological Studies

Baghdad Science Journal ◽

10.21123/bsj.2020.17.1.0099 ◽

2020 ◽

Vol 17 (1) ◽

pp. 0099

Author(s):

Lekaa khalid Karem

Keyword(s):

Schiff Base ◽

Schiff Base Ligand ◽

Magnetic Moment ◽

Primary Amine ◽

Molar Conductivity ◽

Spectroscopic Methods ◽

Geometrical Shape ◽

Biological Studies ◽

Different Types ◽

Uv Visible

This search includes the preparation of Schiff base ligand (SB) from condensation primary amine with vanillin. The new ligand was diagnosed by spectroscopic methods as Mass, NMR, CHN and FTIR. Ligand complexes were mixed from new (SB) and Anthranillic acid (A) with five metal (II) chlorides. The preparation and diagnosis were conducted by FTIR, CHN, UV-visible, molar conductivity, atomic absorption and magnetic moment. The octahedral geometrical shape of the complexes was proposed. The ligands and their new complexes were screened with two different types of bacteria.

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Growth, luminescence, defects and scintillation properties of Sr co-doped LiI:Eu single crystal scintillator

Materials Today Communications ◽

10.1016/j.mtcomm.2021.103011 ◽

2021 ◽

pp. 103011

Author(s):

Kalyani ◽

Mohit Tyagi ◽

A.K. Singh ◽

Sonu ◽

G. Anil Kumar

Keyword(s):

Single Crystal ◽

Crystal Scintillator ◽

Co Doped

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The Transition Metal-rich Orthophosphate Arrojadite with Special Structural Features

Zeitschrift für Naturforschung B ◽

10.1515/znb-2010-1203 ◽

2010 ◽

Vol 65 (12) ◽

pp. 1427-1433 ◽

Cited By ~ 1

Author(s):

Christoph Kallfaß ◽

Constantin Hoch ◽

Hermann Schier ◽

Arndt Simon ◽

Helmut Schuber

Keyword(s):

Crystal Structure ◽

Transition Metal ◽

Single Crystal ◽

Structural Features ◽

Nickel Plate ◽

Single Crystal Diffraction ◽

X Ray ◽

Different Types ◽

New Feature

The crystal structure of the transition metal-rich orthophosphate mineral arrojadite was reexamined, and the disorder phenomena were analyzed applying modern X-ray single-crystal diffraction and refinement methods on samples from Nickel Plate (USA) and Hagendorf (Germany). As a new feature of the arrojadite structure, two different types of channels oriented along [010] are described. The occupancy of the atomic positions inside these channels have been elucidated.

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Transmission Electron Microscopy Observation of 11MEV B5+ Ion Irradiation in Bi2Sr2CaCu2O7-x Single Crystal

Microscopy and Microanalysis ◽

10.1017/s1431927600017116 ◽

1999 ◽

Vol 5 (S2) ◽

pp. 758-759

Author(s):

W.L. Zhou ◽

Y. Sasaki ◽

Y. Ikuhara ◽

C.J.O’Connor

Keyword(s):

Single Crystal ◽

Ion Irradiation ◽

Target Material ◽

Heavy Ion ◽

Zone Melting ◽

Cross Sectional ◽

Transmission Electron ◽

Different Types ◽

Induced Defects ◽

Irradiation Induced Defects

Artificial defects generated by ion irradiation have been considered an efficient method to enhance the critical current density in superconducting materials. The mechanism of producing defects as flux pining centers is still an important issue since the efficiency of irradiation-induced defects in flux pinning strongly depends on their microstructures. Different types of defects have been found in heavy ion irradiation. However, there are few results that show light ion irradiation due to the target material selected, the type of light ion and energy, and the incident ion angle. Another factor is the difficulty of cross-sectional sample preparation. In this paper, a single crystal Bi2Sr2CaCu2O7-x with 11 MeV B5+ ion irradiation was observed by transmission electron microscope (TEM) from both plan and cross-sectional view.The Bi2Sr2CaCu2O7-x single crystals used for ion irradiation were prepared using the floating-zone melting method. The crystals were cleaved into thin sheets of about 20 μm thickness along the a-b plane and cut to about 2mmx2mm size.

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Synthesis, characterization and structure of the Bis(methyl-cyclopentadienyl)vanadium(IV) carboxylates

Open Chemistry ◽

10.2478/bf02476246 ◽

2005 ◽

Vol 3 (1) ◽

pp. 157-168 ◽

Cited By ~ 3

Author(s):

Jaromír Vinklarek ◽

Jan Honzíĉek ◽

Ivana Císařová ◽

Martin Pavliŝta ◽

Jana Holubová

Keyword(s):

Aqueous Solution ◽

Single Crystal ◽

Diffraction Analysis ◽

Carboxylic Acids ◽

X Ray Diffraction ◽

Monocarboxylic Acids ◽

X Ray ◽

Different Types ◽

Chelate Compounds ◽

Parameter Values

AbstractThe 1,1’-dimethylvanadocene dichloride ((C5H4CH3)2VCl2) reacts in aqueous solution with various carboxylic acids giving two different types of complexes. The 1,1’-dimethylvanadocene complexes of monocarboxylic acids (C5H4CH3)2V(OOCR)2 (R=H,CCl3, CF3, C6H5) contain two monodentate carboxylic ligands, whereas oxalic and malonic acids act as chelate compounds of the formula (C5H4CH3)2V(OOC-A-COO) (A=−, CH2). The structure of the (C5H4CH3)2 V(OOCCF3)2 complex was determined by single crystal X-ray diffraction analysis. The isotropic and anisotropic EPR spectra of all the complexes prepared were recorded. The obtained EPR parameter values were found to be in agreement with proposed structures.

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