An efficient technology was developed for growing the gadolinium gallium garnet (GGG) single-crystal films doped with Nd
3+
or Cr and Ca ions. The films with thickness up to 100 µm have been grown by ...liquid-phase epitaxy method on undoped GGG substrates of small and big sizes (5–8 mm and up to 76 mm in diameter, respectively). The dependence of absorption, luminescence spectra and optical losses at the wavelength of 1 µm on growth temperature and melt-solution composition was studied. We demonstrated that Cr
4+
centers have been implemented in epitaxial films and these films may be used as passive Q-switches for laser systems.
The technical characteristics of the KPPO-01 equipment for checking the measurement channels of stationary radiation-monitoring systems without detaching them from the detection units are presented. ...The main features of the checking procedure, which enables the error to be minimized in accordance with a special checking scheme, are pointed out. The verification procedures without detachment, the checking equipment, and the checking scheme are standardized.PUBLICATION ABSTRACT
Germinogennye opukholi u bol'nykh SPIDom A V Pivnik; N V Seregin; Yu G Parkhomenko ...
Sovremennaia onkologiia : zhurnal kafedry onkologii RMAPO dlia nepreryvnogo poslediplomnogo obrazovaniia,
06/2008, Letnik:
10, Številka:
2
Journal Article
Recenzirano
Odprti dostop
В практике врача-гематолога, как правило, встречаются пациенты с периферической и средостенной лимфаденопатией, при исследовании которой будет верифицирован диагноз генерализованной герминогенной ...опухоли (ГЕО) с вовлечением гонад или внегонадной забрюшинной/медиастинальной локализацией. Герминомы центральной нервной системы (ЦНС) подлежат дифференциальному диагнозу с первичной лимфомой ЦНС. В данном сообщении мы приводим краткое описание трех таких наблюдений.
We present a model independent approach for the reconstruction of the atomic concentration profile in a nanoscale layered structure, as measured using the X-ray fluorescence yield modulated by an ...X-ray standing wave (XSW). The approach is based on the direct regularized solution of the system of linear equations that characterizes the fluorescence yield. The suggested technique was optimized for, but not limited to, the analysis of periodic layered structures where the XSW is formed under Bragg conditions. The developed approach was applied to the reconstruction of the atomic concentration profiles for LaN/BN multilayers with 50 periods of 35 A thick layers. The object is especially difficult to analyse with traditional methods, as the estimated thickness of the interface region between the constituent materials is comparable to the individual layer thicknesses. However, using the suggested technique it was possible to reconstruct the La atomic profile, showing that the La atoms stay localized within the LaN layers and interfaces and do not diffuse into the BN layer. The atomic distributions were found with an accuracy of 1 A. The analysis of the Kr fluorescence yield showed that Kr atoms originating from the sputter gas are trapped in both the LaN-on-BN and the BN-on-LaN interfaces.
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