Electron structure and optical propertics of Gd3Ga5O12 GARNET doped with Tb

Rare-earth doped gadolinium gallium garnet (Gd3Ga5O12) has attracted much attention as important material for application in many optical devices. Recently, the nanostructure materials are considered as potentially useful for many technological applications. This paper presents the results of electron structure and spectral-luminescent properties of pure and Tb3+ doped Gd3Ga5O12 nanopowders prepared by a co-precipitation method. Analysis of diffractograms of the nanopowders showed that the minimum calcinations temperature that allowed getting a single garnet phase is T ~ 750oC. An average crystalline size of powders is about 35-47 nm. The surface microstructure was observed by using an atomic force microscope Solver P47H-PRO. The luminescence transition 5D4→7Fj (green emission) is dominated at the X-ray and photo excitation of nanosized Gd3Ga5O12 doped with Tb3+. The influence of the crystalline size and preparing condition on the luminescence properties of Gd3Ga5O12 is discussed. High-energy spectroscopy has been used to study the electron structure of the investigated rare-earth doped gadolinium gallium garnet (Gd3Ga5O12). The calculations of electron energy bands E(k) and partial DOS for compounds were performed by the semi relativistic linear muffin-tin orbital method without considerations of spin-orbit interactions. Effective filling numbers of electrons in different bands of components in garnet Gd3Ga5O12 been calculated. Between the experimental and calculated X-ray emission spectra garnet Gd3Ga5O12 good agreement has been obtained

X-ray spectra and electronic structure of the Ca3Ga2Ge3О12 compound

The band structure of Ca3Ga2Ge3О12 with the garnet structure has been determined for the first time by X-ray emission and photoelectron spectroscopy. It has been established that the bottom of the valence band is formed by Ge d states, which are not dominant in the chemical bonding. Strong hybridization of oxygen 2s states with 4p states of Ga and Ge revealed by the presence of an extra structure in the X-ray emission spectra has been found. The middle of the valence band has been demonstrated to be occupied by d states of Ga, while Ga and Ge 4рstates with a considerable admixture of oxygen 2p states form the top of the valence band

THE EXPERIENCE OF PHYSIOTHERAPY TREATMENT OF VESICO-DEPENDENT FORMS MEGAURETER IN CHILDREN

The article reflects one of the important challenges in pediatric urology — treatment of megaureter in children, the condition which can lead to sclerotic changes in renal parenchyma and development of chronic renal failure. The authors used the physiotherapeutic method of treatment, including electrophoresis with the anti-sclerotic agent at the area of bladder and lower third of ureters. The received results, demonstrating successful effect of this treatment, are represented in the article

ОПЫТ ФИЗИОТЕРАПЕВТИЧЕСКОГО ЛЕЧЕНИЯ ПУЗЫРНО-ЗАВИСИМЫХ ФОРМ МЕГАУРЕТЕРА У ДЕТЕЙ

The article reflects one of the important challenges in pediatric urology — treatment of megaureter in children, the condition which can lead to sclerotic changes in renal parenchyma and development of chronic renal failure. The authors used the physiotherapeutic method of treatment, including electrophoresis with the anti-sclerotic agent at the area of bladder and lower third of ureters. The received results, demonstrating successful effect of this treatment, are represented in the article. Статья посвящена одному из важных вопросов детской урологии — лечению мегауретера у детей, наличие которого чревато развитием склеротических изменений в почечной паренхиме и формированием хронической почечной недостаточности. Авторы применили физиотерапевтический метод лечения, включающий электрофорез области мочевого пузыря и нижней трети мочеточников с препаратом, обладающим противосклеротическим действием. Представлены полученные результаты, которые демонстрируют положительный эффект указанной терапии.