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Showing 1 to 20 of 34 for “"praseodymium"”.
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Moessbauer Scattering in Praseodymium-141
Made available in DSpace on 2015-05-12T22:38:45Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7206941.PDF: 2630342 bytes, checksum: 9190b90a8a5e3607670ee1e1971577eb (MD5) Previous issue date: 1971
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Preparation and characterization of praseodymium oxide films and powders.
Nanocrystalline praseodymium oxide films have been successfully generated on stainless steel substrates. The electrochemical deposition was performed in the cathode compartment of a divided electrochemical cell with a regular three-electrode configuration. The green films obtained by …
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Electrical properties and defect structures of praseodymium-cerium oxide solid solutions
… dependence of electrical conductivity in praseodymium cerium oxide (PCO) was developed. Four point DC conductivity measurements were made from 1 atm to 1018 atm p02 over isotherms ranging from 600-1 000Ê»C in materials containing 0-20% Pr. A pO02-dependent ionic conductivity was observed …
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Temperature and strain dependence of fluorescence in praseodymium-doped silica optical fibre
… sensors can be incorporated. In this thesis, praseodymium (Pr3)-doped silica optical fibres were investigated for their temperature and strain properties using the fluorescence lifetime technique. These fibres had a Pr3+-ion concentration of 700 ppm and lOOOppm, the latter of which was …
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Electrical and magnetic properties of twin-free single-crystal praseodymium-doped YBa2Cu3O7-d
"We have grown high quality single crystals of Y1-xPrxBaiCu30 7_8 (Pr-doped YBCO), and have succeeded in detwinning them by applying uniaxial stress. The quality of these samples was shown by both magnetic and electrical transport measurements. Each of these methods showed that our samples had …
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Moessbauer Scattering Studies With the Isotopes Osmium-186, Osmium-188, Europium-153, and Praseodymium-141
Made available in DSpace on 2015-05-12T21:41:32Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6507141.PDF: 1887574 bytes, checksum: 4970cd47ca2bbad51bf2c2904b26bedd (MD5) Previous issue date: 1965
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Electrical and magnetic properties of twin-free single-crystal praseodymium-doped yttrium barium copper oxide
Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T15:06:40Z Item is restricted indefinitely.
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Praseodymium doping in Pd/CeO2 systems: material properties and application for the complete methane oxidation reaction
L'abstract è presente nell'allegato / the abstract is in the attachment
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Characterisation of optical fibre amplifiers: amplifiers for the 632.8 nm He-Ne wavelength in praseodymium-doped ZBLAN
… amplification on the 3Po-3F2 transition in a praseodymium-doped fluorozirconate optical fibre at the 632.8 nm He-Ne wavelength, has been conducted. The optical gain is fundamentally related to the spectroscopic characteristics of praseodymium-doped in a fluorozirconate glass host together with …
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Spin-Lattice Relaxation of Trivalent Praseodymium, Terbium, and Erbium Inanhydrous Lanthanum-Trichloride: Temperature and Magnetic Field Dependence
Made available in DSpace on 2015-05-12T21:41:47Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 6901301.PDF: 4932944 bytes, checksum: 07f65236b3055da1dff7449f95105de0 (MD5) Previous issue date: 1968
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Photoneutron Cross-Sections and Spectra From Monoenergetic Photons on Yttrium, Praseodymium, Lead and Bismuth in Giant-Resonance
Made available in DSpace on 2015-05-12T22:38:51Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7310095.PDF: 2208556 bytes, checksum: b6b00daaaad9d51ad4afb18f41611203 (MD5) Previous issue date: 1972
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Spin-lattice relaxation of trivalent praseodymium, terbium, and erbium in anhydrous lanthanum trichloride: Temperature and magnetic field dependence
We present the results of our measurements of the spinlattice relaxation rates of several trivalent rare earth ions, in the temperature range 0.25 - 4.2o K. We analyze these results within the framework of the Kronig-Van Vleck-Orbach theory, the main features of which we derive in a semi-rigorous …
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A High Energy X-Ray Diffraction Investigation Of Sodium Phosphate Glasses Doped With Less Than 5 Mol% Praseodymium Oxides
… content. In this study, praseodymium doped sodium phosphate glasses with even lower praseodymium oxide concentrations, (Pr<sub>2</sub>O<sub>3</sub>)<sub>x</sub>(Na<sub>2</sub>O)<sub>y</sub>P<sub>2</sub>O<sub>5</sub>)<sub>1-x-y</sub> , where 0.005 < x < 0.05 were processed …
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Determining rare earth dopant concentrations in optical fibres and waveguides
… group that used the fluorescence lifetimes of praseodymium-doped fibres. Their work found that the lifetime of the lifetime of praseodymium-doped ZBLAN fibre increased linearly with praseodymium concentration. These results showed promise in the use of fluourescence lifetimes as a method for …
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Studies on Resolution of Enantiomeric Dialkylaryl Sulfonium Ions with NMR Shift Reagents
<p>Praseodymium(III) NMR shift reagent, which is an upfield shift reagent, is focused on for assessment of enantiomeric excess and resolution of methyl sulfonium ions. A series of alkylmethylphenylsulfonium ions were analyzed, where alkyl is ethyl (I), butyl(H), octyl (III), and benzyl(IY). The …
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DOSIMETRIC STUDY OF BETA-MINUS EMITTER PRASEODYMIUM-142 : APPLICATIONS IN MICROSPHERE BRACHYTHERAPY FOR HEPATOCELLULAR CARCINOMA AND BRACHYTHERAPY FOR OCULAR SQUAMOUS CELL CARCINOMA
A dosimetric study of the beta-minus emitter Praseodymium-142 (¹⁴²Pr) was performed and two main innovative applications of this source in brachytherapy are proposed: microsphere brachytherapy and eye plaque brachytherapy. ¹⁴²Pr (96.3% beta and 3.7% gamma) has recently gained increased attention …
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A spectroscopic study of Nd3+ and Pr3+ doped fluorozirconate glass
This work is an investigation of praseodymium and neodymium doped fluorozirconate glasses with consideration given to applications in medicine, optical data storage and printing, communications and research.
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Polonium extraction techniques for a lead-bismuth cooled fast reactor
… of gaseous polonium species on metallic praseodymium were undertaken. Formation of an oxidation layer and physical deterioration of the praseodymium inhibited proper sample analysis. The extraction techniques of rare-earth filtering and polonium hydride stripping and their relative …
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Nanoparticle Cerium oxide and Mixed Cerium Oxides for Improved Fuel Cell Lifetime
… fuel cells. This work also directly demonstrates praseodymium enrichment of cerium-praseodymium oxide nanoparticles and how both size and composition affected the catalytic properties. Finally, this project has given new direction for doped cerium oxide nanoparticles in hydrogen fuel cells. Both …
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