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  • 2000-2004  (6)
  • 1965-1969  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Interaction of copper metallization with rare-earth metals and silicides (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 503-505 
    Details
    ISSN: 1089-7550
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: Solid-phase reactions of copper films with underlying gadolinium, erbium, and erbium–silicide layers on Si(100) substrates were investigated. For the phase analysis, x-ray diffraction and cross-sectional transmission electron microscopy were used. In the case of Cu/Gd/Si(100), an orthorhombic GdSi2 formed, and, at higher temperatures, copper aggregated into islands. Annealed Cu/Er/Si(100) samples resulted in a hexagonal Er5Si3 phase. In the Cu/ErSi2−x/Si system, the copper catalyzes the transformation of the highly oriented hexagonal ErSi2−x phase into hexagonal Er5Si3. Diverse phase developments of the samples with Gd and Er are based on reactivity differences of the two rare-earth metals. © 2001 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1378054
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  • 2
    Digitale Medien
    Digitale Medien
    Formation of epitaxial CoSi2 films on Si and on Si/Si80Ge20 (100) by reactive deposition epitaxy (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 81 (2002), S. 37-39 
    Details
    ISSN: 1077-3118
    Quelle: AIP Digital Archive
    Thema: Physik
    Notizen: CoxTi1−x layers were deposited on Si (100) and on Si/Si80Ge20 (100) capped with 30- or 40-nm-thick Si at 650 °C substrate temperature at 1×10−6 Pa pressure. The Co–silicide films grown by reactive deposition epitaxy were characterized by Rutherford backscattering-channeling, x-ray difraction, by depth profile analysis of the components, and by sheet resistance measurements. The Ti content of the deposited Co layers was between 0.1 and 8 at. %. The epitaxy of the layers on Si and on Si/Si80Ge20 improved by increasing the Ti concentration. The minimum yield of the channeling and the full width at half maximum value of the rocking curve of CoSi2 decreased. The sheet resisitance of the formed layers was also minimal in these cases. The method applied is promising to form epitaxial CoSi2 layers on SixGe1−x substrates. © 2002 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1491012
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  • 3
    Digitale Medien
    Digitale Medien
    Application of Newton's law to body cooling (1969)
    Springer
    Pflügers Archiv 311 (1969), S. 16-24 
    Details
    ISSN: 1432-2013
    Schlagwort(e): Body Temperature ; Body Cooling ; Hypothermia ; Thermal Constants ; Cooling Constant
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Newton's law of cooling was used to analyze the fall in rectal temperature post mortem in 55 cases during refrigeration in a mortuary. As with solids of low thermal conductivity, there was an initial curvilinearity to the semilog plot lasting 1 to 11 hours (related to pelvic circumference) while the proper internal temperature distribution was becoming established. Thereafter there was a linear trend representing a constant percent cooling rater 1 which lasted up to 24 hours for adults. This was followed by a less steep trend of cooling rater 2, which was 37% less thanr 1. This diminution in cooling rate occurred when the rectal temperature fell below 10°C and was ascribed to a reduction in the thermal diffusivity of fat.r 1 had the highest correlation with pelvic circumference. For the nude body in still airr 1=15.6% to 18.4% (T r −T a )/hour for children, 3.8% to 9.4% for adults. Wind increasedr 1; the decrease due to clothing was questionable because of the paucity of cases.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00588059
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  • 4
    Digitale Medien
    Digitale Medien
    Nondestructive Analysis of Metals by PGAA at the Budapest Research Reactor (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 244 (2000), S. 379-382 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract Since 1996 several applications of prompt gamma activation analysis have been performed at the new Budapest PGAA facility. This paper deals with the investigation of metal objects. We report the results of nondestructive detection of H in amorphous metals, multielement analysis of Roman bronze brooches and measurement of silver concentration in Hungarian coins.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1006791710995
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  • 5
    Digitale Medien
    Digitale Medien
    A New Gamma-Ray Spectrum Catalog for PGAA (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 244 (2000), S. 383-389 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract A major obstacle to the use of the prompt gamma activation analysis (PGAA) method has so far been the lack of a suitable library. Therefore, new measurements have been performed at the PGAA facility at Budapest Research Reactor (BRR) in order to create a prompt γ-ray catalog for qualitative and quantitative analysis. Prompt γ-ray energies and associated k 0-factors have been determined by internal standardization. The resulting catalog contains prompt γ-ray data from neutron capture and other reactions such as (n,α), and decay γ-ray data from short-lived reaction products. Data have been measured for nearly all stable elements, from hydrogen to uranium. Generally, data for several isotopes are given, to enable isotopic analysis as well.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1006795827833
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  • 6
    Digitale Medien
    Digitale Medien
    Nuclear Data for Activation Analysis (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 244 (2000), S. 27-33 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract Nuclear data for neutron activation analysis are reviewed critically. Available sources of neutron cross sections and related quantities, radioactive decay half-lives, gamma-ray energies and absolute intensities, as well as prompt gamma-ray data are assessed from the viewpoint of quantitative analysis. New developments in the production and dissemination of such data are also described, and practical recommendations are formulated. Special emphasis is given to the traceability of sources, the accuracy and age of data, and to electronic access via Internet.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1006798216987
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  • 7
    Digitale Medien
    Digitale Medien
    On the Behavior of [Zn(Propyltetrazole)6](BF4)2 Single Crystal Under High-Vacuum Conditions (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 245 (2000), S. 329-335 
    Details
    ISSN: 1588-2780
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Energietechnik
    Notizen: Abstract We studied the long-term (190 hours) behaviour of [Zn(propyltetrazole)6](BF4)2 single crystal under high-vacuum (HV) conditions (10−8 torr) with a depth-sensitive technique of positron annihilation spectroscopy (PAS). The obtained data indicate the slow formation of a new near-surface structure which is formed by the decomposition of the [Zn(propyltetrazole)6]2+ ions. The assumption of such a decomposition process was confirmed by additional mass spectroscopic measurements.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1006762505559
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