Sökning: "Hyperfine transition"

Hittade 4 uppsatser innehållade orden Hyperfine transition.

  1. 1. Measuring the [C II]-to-H I connection in high-redshift absorption-selected galaxies

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Gaurav Senthil Kumar; [2022]
    Nyckelord :QSO; Quasar; Black Hole; AGN; Active Galactic Nuclei; DLA; Damped Lyman Alpha; C II; [C II]; H I; Sightline; HST; X-shooter; Spectroscopy; Echelle Spectroscope; Hyperfine transition; Hyperfine; Physics and Astronomy;

    Sammanfattning : HI neutral gas is the basic building block of galaxies. It dictates the star formation rate and hence the metal enrichment rates within high redshift galaxies. HI neutral gas cannot be directly observed beyond z ≈ 0. LÄS MER

  3. 2. Hyperfine structure measurements in scandium for IR spectroscopy

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Författare :Felix van Deelen; [2017]
    Nyckelord :Astrophysics; Atomic Data; Hyperfine Structure; Stellar Spectroscopy; Physics and Astronomy;

    Sammanfattning : Stellar abundances are important for understanding the chemical evolution of galaxies and provide us with constraints on stellar evolution and supernova nucleosynthesis. To determine stellar abundances accurately, atomic data is crucial. This data is incomplete for many elements, especially in the infrared region. LÄS MER

  4. 3. High delity operations in a europium doped inorganic crystal

    Kandidat-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Pernilla Helmer; [2015]
    Nyckelord :quantum information; Eu; europium; hole burning; quantum memory; qubit; Physics and Astronomy;

    Sammanfattning : The computer has since it was invented become a most crucial tool for scientists in all fields. It has however severe limitations when it comes to e.g. simulating quantum systems, a task quantum computers might be able to perform. LÄS MER

  5. 4. Measurements of electric fields in a plasma by Stark mixing induced Lyman-α radiation

    Master-uppsats, Institutionen för fysik och astronomi

    Författare :Petter Ström; [2013]
    Nyckelord :Plasma diagnostic; electric field measurement; non-intrusive; Stark effect; Lyman-alpha; hyperfine structure; H 2s ; cesium vapour;

    Sammanfattning : This paper treats a non-intrusive method of measuring electric fields in plasmas and other sensitive or hostile environments. The method is based on the use of an atomic hydrogen beam prepared in the metastable fine structure quantum state 2s1/2. LÄS MER