Immobilization of Eu3+ Ions in Zeolite Matrices in Order to Develop Solid-State Radioluminescent Light Sources

2019 ◽  
Vol 45 (6) ◽  
pp. 537-544
Author(s):  
N. Yu. Ul’yanova ◽  
E. V. Zelenina ◽  
V. L. Ugolkov ◽  
O. Yu. Golubeva
Keyword(s):  
Solid State ◽  
Light Sources ◽  
Radioluminescent Light Sources

scholarly journals SYNTHESIS OF ZINC SULFIDE RADIOLUMINESCENT PHOSPHORS WITH USE OF ELECTRONIC BEAM MODIFICATION AND INVESTIGATION OF THEIR PROPERTIES

2021 ◽  
Vol 58 ◽  
pp. 46-50
Author(s):  
Mikhail A. Shvindin ◽  
◽  
Vadim V. Bakhmetyev ◽  
Keyword(s):  
Crystal Structure ◽  
Experimental Data ◽  
Electron Beam ◽  
Solid State ◽  
Zinc Sulfide ◽  
Spectral Characteristics ◽  
Light Sources ◽  
Synthesis Conditions ◽  
Radioluminescent Light Sources ◽  
First Time

Synthesized recombination-type zinc sulfide phosphors used in solid-state radioluminescent light sources (SSRLS) are the object of the research. In the course of the study, experimental data were obtained for the first time on the effect of the amount of the incorporated activator on the brightness-spectral characteristics of radioluminescence upon excitation by β-radiation of tritium. Data were obtained on the changes in the radioluminescence parameters under various synthesis conditions, phase composition and electron-beam modification of the crystal structure of the initial phosphors. The results of the work make it possible to find the best light compositions for the use in solid-state radioluminescent light sources

Prospects for the Development of Tritium-Based Solid-State Radioluminescent Light Sources

2019 ◽  
Vol 61 (1) ◽  
pp. 55-60 ◽  
Author(s):  
E. V. Zelenina ◽  
M. M. Sychov ◽  
A. I. Kostylev ◽  
K. A. Ogurtsov
Keyword(s):  
Solid State ◽  
Light Sources ◽  
Radioluminescent Light Sources

scholarly journals ADVANCED TECHNOLOGY OF LUMINOPHOR SCREENS FOR SOLID RADIOLUMINESCENT LIGHT SOURCES

Doklady BGUIR ◽  
2019 ◽  
pp. 59-66
Author(s):  
E. V. Zelenina ◽  
E. A. Pechertseva ◽  
V. V. Bakhmetyev ◽  
M. M. Sychov
Keyword(s):  
Solid State ◽  
Sol Gel ◽  
Main Idea ◽  
Advanced Technology ◽  
Solid Matrix ◽  
Light Sources ◽  
Phosphor Screen ◽  
Gel Technique ◽  
Radioluminescent Light Sources ◽  
Phosphor Screens

The article observes different methods of coating the phosphor screens on the tritiated titanium matrices for creating the solid-state radioluminescent light sources (SRLS). Technology of SRLS is alternative to the existing technology of the gas-filled radioluminescent light sources. The main idea of SRLS is in bonding the working isotope (tritium) in the solid matrix and combining it with the phosphor. The key problem of SRLS is to provide the closest contact between the tritiated carrier matrix and phosphor screen. The basic requirements for the phosphor screens for SRLS would be the strength of fixation on the plate, uniformity and radiological and thermal stability. There have been made a comparison of various techniques of coating and fixing the phosphor screens by their effect on spectral and brightness characteristics of SRLS. The improved sol-gel technique of suspended sedimentation of phosphor screen from the potassium water glass binder solution was developed. The composition of the solution was established experimentally and we get the strong and uniform experimental prototypes of the glass coated phosphor screens of various thickness. The developed technology allows to deposit the strong and uniform phosphor coatings without using any additional dispersing agents. Screen thickness regulates by the amount of phosphor in the suspension. Also the optimal thickness of the phosphor screen, giving the maximum luminescence intensity was determined. The two laboratory prototypes of solid-state radioluminescent light sources were manufactured by coating the phosphor directly on the tritium β-source.

scholarly journals Synthesis of ZnS:Cu,Br radioluminescent phosphors using the electron-beam treatment and studying their characteristics

2021 ◽  
Vol 2056 (1) ◽  
pp. 012047
Author(s):  
V V Bakhmetyev ◽  
E V Zelenina ◽  
M A Shvindin
Keyword(s):  
Electron Beam ◽  
Solid State ◽  
Short Range ◽  
Light Sources ◽  
Electron Beam Treatment ◽  
Phase Content ◽  
Acid Base ◽  
Safety Control ◽  
Initial Charge ◽  
Radioluminescent Light Sources

Abstract ZnS:Cu radioluminescent phosphors find their applications in medicine nondestructive testing, safety control and can be used as a part of the solid-state radioluminescent light sources (SRLS). This devices are very promising technology due to their independence longevity and safety compared to the gas-filled RLS. Because of the fact that tritium (the most popular radioisotope for RLS) has a very short range in substances, the improving the operating performances of radiophosphors is a crucial task for SRLS. In our study we used the electron-beam treatment to increase the brightness of radioluminescence of ZnS:Cu phosphors. It was found that bombardment of the phosphors initial charge with electrons of 900 kEv energy improves the brightness of radioluminescence by 15 – 20%. Double modifying of the initial charge and ready phosphor cause the 80% increase of brightness. The effect of electron-beam treatment on the phase content and the surface properties was studied at varying the content of activator (Cu) in the range of 0 – 0.6 % mass. As a result the model describing structure of the acid-base sites on the ZnS:Cu phosphor surface was suggested.

Synthesis and Electron-Beam Modification of Zinc-Sulphide Phosphors for Solid-State Radioluminescent Light Sources (SRLS)

2021 ◽  
Vol 1040 ◽  
pp. 35-40
Author(s):  
Elena V. Zelenina ◽  
Vadim V. Bakhmetyev ◽  
Maxim М. Sychov ◽  
Mikhail A. Shvindin
Keyword(s):  
Electron Beam ◽  
Solid State ◽  
High Energy ◽  
Zinc Sulphide ◽  
Structural Defects ◽  
Light Sources ◽  
Electron Beam Treatment ◽  
Phase Content ◽  
Initial Batch ◽  
Radioluminescent Light Sources

Radioluminescence technologies are at the front line of the optic and electronic studies. Effective, self-contained and safe radioluminescent light sources can find their application in space industry, in medicine and in military technologies. The question of the performance improvement of the solid-state radioluminescent light sources (SRLS) without raising the included activity of working radionuclide can be solved by upgrading the phosphor crystalline structure. The electron-beam treatment for zinc-sulphide phosphors initial batch has been studied in a wide range of concentrations of the activating agent (Cu) for improving the radioluminescent performances of the phosphors, for creating the structural defects that form centers of luminescence. The changes of the phase composition were investigated under different synthesis conditions. It is revealed that electron-beam treatment of the initial batch leads to the growth of the wurtzite phase content in zinc-sulphide phosphors synthesized below the phase transition temperature. The changes of the phase content promote the spectral redistribution under the tritium beta-excitation. It is obviously the reflection of the fact of «green» luminescence centers rearrangement between the volume of the crystal and its surface. The correlations between structural configuration and performances of ionizing luminescence were found. Electron beam treatment gave the 20% increase of brightness of the radioluminescence. The achieved enhancement of luminescence performances allows the development of advanced tight-packed SRLS with minimal radioactivity and high energy-light conversion.

Development of a three-dimensional color rendition space for tunable solid-state light sources

2021 ◽  
Vol 2021 (29) ◽  
pp. 136-140
Author(s):  
Dorukalp Durmus
Keyword(s):  
Solid State ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Color Discrimination ◽  
Continuous Measure ◽  
Light Sources ◽  
Vast Number ◽  
Lighting Systems ◽  
Single Number

The quality of building electric lighting systems can be assessed using color rendition metrics. However, color rendition metrics are limited in quantifying tunable solid-state light sources, since tunable lighting systems can generate a vast number of different white light spectra, providing flexibility in terms of color quality and energy efficiency. Previous research suggests that color rendition is multi-dimensional in nature, and it cannot be simplified to a single number. Color shifts under a test light source in comparison to a reference illuminant, changes in color gamut, and color discrimination are important dimensions of the quality of electric light sources, which are not captured by a single-numbered metric. To address the challenges in color rendition characterization of modern solid-state light sources, the development of a multi-dimensional color rendition space is proposed. The proposed continuous measure can quantify the change in color rendition ability of tunable solid-state light devices with caveats. Future work, discretization of the continuous color rendition space, will be carried out to address the shortcomings of a continuous three-dimensional space.

Sign in / Sign up

Export Citation Format

Share Document