نتایج جستجو برای: yttrium emission
تعداد نتایج: 184664 فیلتر نتایج به سال:
The preparation of yttrium metal by the reduction of yttrium trifluoride with calcium is described. Alternate methods employing the formation of a low melting Y-Zn or Y-Mg intermediate alloy are evaluated and data on chemical and microscopic purity of the resulting metal are presented.
Tin and lithium plasmas emit efficiently in the in-band region 13.5 nm with 2% bandwidth necessary for extreme ultraviolet EUV lithography. We have made a detailed comparison of the atomic and ionic debris, as well as the emission features of Sn and Li plasmas under identical experimental conditions. Planar slabs of pure Sn and Li were irradiated with 1064 nm, 9 ns neodymium-doped yttrium alumi...
The first structurally authenticated yttrium-alkyl-alkylidene is reported; structural, spectroscopic, and theoretical analyses show that whilst the yttrium-alkylidene bond is short, it possesses a bond order less than one and is comparable to the Y-C(alkyl) single bond within the same molecule.
BACKGROUND Yttrium-90 (90Y) positron emission tomography with integrated computed tomography (PET/CT) represents a technological leap from 90Y bremsstrahlung single-photon emission computed tomography with integrated computed tomography (SPECT/CT) by coincidence imaging of low abundance internal pair production. Encouraged by favorable early experiences, we implemented post-radioembolization 90...
To investigate the influence of heavy rare earth element yttrium on type, morphology, and quantity distribution inclusions in grain-oriented silicon steel, thermodynamic calculation was carried out typical steel containing yttrium. The main experimental steels with without were observed analyzed using field emission scanning electron microscope (FESEM, Zeiss Gemini SEM 300) energy dispersive sp...
Abstract Fly and bottom ash (FABA) produced primarily from coal combustion in a coal-fired power plant consists of fine particles the organic inorganic mixture trace elements. Eight FABA samples plants Java, Indonesia, had been collected for composition rare earth element Yttrium (REY) mode occurrence identification. The geochemical both major elements was determined by inductively coupled plas...
Determination of rare earth elements in the presence of yttrium oxide by flame emission spectrometry
Yttrium aluminum perovskite (YAP) co-doped with CI3' and Nd3+ is of interest in laser applications because the chromium-neodymium energy transfer is more efficient in YAP than in YAG. Investigation of the energy transfer from the chromium R lines and pair states in the wavelength range 720-740 nm to the Nd3+ upper laser level shows that neither individual C? ions nor C?+-C? pairs are important ...
Positron emission tomography (PET) is the imaging modality most extensively tested for treatment monitoring in particle therapy. Optimal use of PET in proton therapy requires in situ acquisition of the relatively strong 15O signal due to its relatively short half-life (~2 min) and high oxygen content in biological tissues, enabling shorter scans that are less sensitive to biological washout. Th...
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