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Sökning: WFRF:(Marinov A.)

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  • Aad, G, et al. (författare)
  • 2015
  • swepub:Mat__t
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  • Gesheva, Kostadinka, et al. (författare)
  • Optical, structural and electrochromic properties of sputter deposited W-Mo oxide thin films
  • 2016
  • Ingår i: INERA CONFERENCE. - : Institute of Physics Publishing (IOPP).
  • Konferensbidrag (refereegranskat)abstract
    • Thin metal oxide films were investigated by a series of characterization techniques including impedance spectroscopy, spectroscopic ellipsometry, Raman spectroscopy, and Atomic Force Microscopy. Thin film deposition by reactive DC magnetron sputtering was performed at the Ångström Laboratory. W and Mo targets (5 cm diameter) and various oxygen gas flows were employed to prepare samples with different properties, whereas the gas pressure was kept constant at about 30 mTorr. The substrates were 5×5 cm2 plates of unheated glass pre-coated with ITO having a resistance of 40 ohm/sq. Film thicknesses were around 300nm as determined by surface profilometry. Newly acquired equipment was used to study optical spectra, optoelectronic properties, and film structure. Films of WO3 and of mixed W–Mo oxide with three compositions showed coloring and bleaching under the application of a small voltage. Cyclic voltammograms were recorded with a scan rate of 5 mV s–1. Ellipsometric data for the optical constants show dependence on the amount of MoOx in the chemical composition. Single MoOx film, and the mixed one with only 8% MoOx have the highest value of refractive index, and similar dispersion in the visible spectral range. Raman spectra displayed strong lines at wavenumbers between 780 cm–1 and 950 cm–1 related to stretching vibrations of WO3, and MoO3. AFM gave evidence for domains of different composition in mixed W-Mo oxide films.
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  • Marinov, A., et al. (författare)
  • Evidence for the possible existence of a long-lived superheavy nucleus with atomic mass number A=292 and atomic number Z congruent to 122 in natural Th
  • 2010
  • Ingår i: International Journal of Modern Physics E. - 0218-3013. ; 19:1, s. 131-140
  • Tidskriftsartikel (refereegranskat)abstract
    • Evidence for the possible existence of a superheavy nucleus with atomic mass number A = 292 and abundance of about 1 x 10(-12) relative to Th-232 has been found in a study of natural Th using inductively coupled plasma-sector field mass spectrometry. The measured mass is different from any species with molecular mass of 292, but it matches the predictions for the mass of an isotope with atomic number Z = 122 or a nearby element. Its deduced half-life of t(1/2) >= 10(8) y suggests that a long-lived isomeric state exists in this isotope. The possibility that it might belong to a new class of long-lived high spin super- and hyperdeformed isomeric states is discussed.
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