Essays about: "Spectral line broadening"

Found 5 essays containing the words Spectral line broadening.

  1. 1. Collisional broadening by hydrogenfor stellar spectroscopy : extension towards high-lying states

    University essay from Uppsala universitet/Teoretisk astrofysik

    Author : Adam Hultquist; [2019]
    Keywords : Astrophysics; Spectral line broadening; ABO; Collisional broadening;

    Abstract : The object of this thesis is to extend the current tables for two useful quantities when calculatingcollisional broadening, the cross-section of interaction and the velocity parameter.These quantities, which have hitherto been tabulated for lower states, have now been calculatedfor higher lying states and are used in the ABO - model for spectral line broadening. READ MORE

  3. 2. Spectral line broadening using ABO theory

    University essay from Uppsala universitet/Teoretisk astrofysik

    Author : Adam Hultquist; [2019]
    Keywords : ;

    Abstract : .... READ MORE

  4. 3. The solar Mg abundance from strong spectral lines in the infrared

    University essay from Uppsala universitet/Teoretisk astrofysik

    Author : Khaled Al Moulla; [2019]
    Keywords : Sun: Mg abundance – line broadening: ABO theory – VALD – SME;

    Abstract : This project aims to determine the solar Mg abundance with two infrared spectral lines: MgI λ10811 and λ10965. Downloaded line data from VALD are updated with modern values for the oscillator strengths and van der Waals damping parameters, the latter obtained through ABO theory. READ MORE

  5. 4. Broadening of spectral lines in the Gaia-ESO survey

    University essay from Uppsala universitet/Teoretisk fysik

    Author : Kristoffer Bengtsson; [2018]
    Keywords : Astronomy; Hydrogen; Iron; Spectral line broadening; collisional broadening; pressure broadening; Gaia; Stellar atmosphere; spectrum; stars: abundances; Atomic data; Astronomi; tryckbreddning; kollisionsbreddning; breddning av spektrallinjer; spektrum; väte; järn; Gaia; stjärnatmosfär; atomdata;

    Abstract : Analyzing stellar spectra plays a big role in understanding the evolution of our galaxy. Having good data for spectral line properties is very important when analyzing these spectra. One part of the Gaia-ESO public spectroscopic survey (GES) is to gather data for spectral line properties from stellar spectra. READ MORE

  6. 5. Measuring the Optical Properties of Human Muscle Tissue using Time-of-Flight Spectroscopy in the Near Infrared

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

    Author : Staffan Strömblad; [2015]
    Keywords : photon; Time-of-Flight; muscle tissue; optical; spectra; Infrared; Physics and Astronomy; Technology and Engineering;

    Abstract : Optical spectroscopy is commonly used in technology and science today. The presence and concentration of a substance can be determined by its spectral signature, the typical wavelengths that are absorbed (or emitted) by the atoms or molecules. READ MORE