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picture1_Scientific Method Pdf 92742 | Xrf Item Download 2022-09-17 00-25-03


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File: Scientific Method Pdf 92742 | Xrf Item Download 2022-09-17 00-25-03
basic concepts of x ray basic concepts of x ray fluorescence fluorescence by miguel santiago scientific instrumentation specialist university of puerto rico mayaguez campus university of puerto rico mayaguez campus ...

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        Basic Concepts of X-ray 
         Basic Concepts of X-ray 
        Fluorescence
         Fluorescence
        by Miguel Santiago, 
        Scientific Instrumentation Specialist
         University of Puerto Rico – Mayagüez Campus
         University of Puerto Rico – Mayagüez Campus
         Department of Geology
         Department of Geology
         X-ray / Microanalysis Laboratory  
         X-ray / Microanalysis Laboratory  
         F - 304
         F - 304
      Introduction
     † X-ray Fluorescence (XRF) is a nondestructive method for the elemental 
        analysis of solids and liquids. 
     † The sample is irradiated by an intense x-ray beam, which causes the emission 
        of fluorescent x-rays. 
     † The emitted x-rays can either be detected using energy dispersive or 
        wavelength dispersive detector. 
     † Either the energies or wavelengths of the emitted x-rays are used
        to identify the elements present in the sample while the concentrations 
        (how much) of the elements are determined by the intensity of the x-rays.
     † XRF is a bulk analysis technique with the depth of sample analyzed varying 
        from less than 1 mm to 1 cm depending on the energy of the emitted x-ray and 
        the sample composition. 
     † The elements commonly detected range from sodium to uranium.
     †  Lighter elements from boron to fluorine may also be detected.
       How XRF works?
      † X-ray Fluorescence is a fast 
          and easy analytical technique 
          (Figure 1).
                                       Figure 1- Simple Schematic of XRF
       How XRF works?
    † First, source x-rays are 
       produced at energies of 
       several thousand electron 
       volts (Figure 2). 
    † X-rays are generated inside 
       the tube by freeing 
       electrons and accelerating 
       them towards a metal target 
       at energies of several 
       thousand electron volts.
    † Once the electrons hit the 
       metal target, x-ray are Figure 2 -Schematic of typical X-ray tubes.
       produced.
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...Basic concepts of x ray fluorescence by miguel santiago scientific instrumentation specialist university puerto rico mayaguez campus department geology microanalysis laboratory f introduction xrf is a nondestructive method for the elemental analysis solids and liquids sample irradiated an intense beam which causes emission fluorescent rays emitted can either be detected using energy dispersive or wavelength detector energies wavelengths are used to identify elements present in while concentrations how much determined intensity bulk technique with depth analyzed varying from less than mm cm depending on composition commonly range sodium uranium lighter boron fluorine may also works fast easy analytical figure simple schematic first source produced at several thousand electron volts generated inside tube freeing electrons accelerating them towards metal target once hit typical tubes...

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