نتایج جستجو برای: atomic spectrometer source
تعداد نتایج: 524051 فیلتر نتایج به سال:
The whole-blood lead levels of a group of motor mechanics in the Cape Peninsula were determined. Blood was analysed using a graphite furnace atomic absorption spectrometer. The mean whole-blood lead levels of the motor mechanics and of urban controls were 28,4 micrograms/dl and 9,7 micrograms/dl respectively, and comparison of these with that of a group from an unpolluted rural area (3,4 microg...
The content of metal elements in plant tissues of 10-day wheat seedlings after seed pre-treatment and foliar treatment with non-ionic colloidal solution of metal nanoparticles (Fe, Mn, Cu, Zn) was determined by an atomic absorption spectrometer. It was shown that metal nanoparticles due to their physical properties (nanoscale and uncharged state) were capable of penetrating rapidly into plant c...
We show how to detect and correct for nonlinear phase shifts in a mainly one-sided interferogram of an emission-line source. We simultaneously detect and correct for an out-of-phase emission background from the spectrometer. The method requires two auxiliary spectra, one of a strong continuum source, and one of an emission-line source with little or no continuum.
The Penning trap mass spectrometer JYFLTRAP, coupled to the Ion-Guide Isotope Separator On-Line (IGISOL) facility at Jyväskylä, was employed to measure the atomic masses of neutron-rich 85−92 Br and 94−97 Rb isotopes with a typical accuracy less than 10 keV. Discrepancies with the older data are discussed. Comparison to different mass models is presented. Details of nuclear structure, shell and...
The design of a novel-type of atomic beam source which provides for long term, stable operation at high emission rates is reported. The heart of the design is the “candlestick” where liquid source material is transported by capillary action to a localized hot emission region. A surrounding cavity kept at the melting point for the source material shields the vacuum chamber walls from this region...
Akronnal (M + 1)/M retloe In the lon trap mas8 spectrometer were examlned to resolve questions about their source. Comporwkshowlng “rrl f r a g ” plovlde normal (M + 1)/M ratios except undar condnkns of space charglng (high ion com8nbaUan). SWtamas provldhg akmlant alkyl Ions form (M + H)’ Ions through proton transfer to neutrals. Concentrations causing thls effect In the Ion trap mass spectrom...
In this work, the effect of doping Graphene Quantum Dots (GQDs) on their emission spectra has been studied. First, graphene has been deposited on SiC substrate by using sublimation method. Second, doped-GQDs have been distributed on the surface of graphene via drop casting. The structure of the samples have been studied and characterized by X-ray diffraction (XRD), Scanning Electron Microscopy ...
Alkali metal dispensers have become an indispensable tool in the production of atomic vapors for magnetometry, alkali vapor cell clocks, and laser cooling experiments. A primary advantage these is that they contain inert form can be exposed to air without hazard. However, their high temperature operation (>600 C) undesirable many applications, as it shifts speed distribution higher values prese...
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