Sökning: "uranium"

Visar resultat 1 - 5 av 85 uppsatser innehållade ordet uranium.

  1. 1. Decay Chains of Fast Alpha Emitters in the Actinide Region

    Magister-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Partikel- och kärnfysik

    Författare :Tanvir Sayed; [2024]
    Nyckelord :alpha decay; alpha emissions; fine structure; decay chain; decay scheme; alpha spectrometry; actinide; nucleus; nuclear structure; nuclear states; energy levels; uranium isotopes; U310 experiment; parasitic runs; decay station; TASISpec ; moving window deconvolution; digitisers; alpha-gamma coincidence; 221-Th decay; fine structure of alpha decay to 217-Ra; GSI; Gamow s theory; Geiger-Nuttall; chain search; short half-lives; Physics and Astronomy;

    Sammanfattning : With the advent of increasingly advanced spectroscopic instruments after the turn of the century, it has become accessible to unravel the structure of instantly ‘vanishing’ nuclei, with lifetimes as short as 1 μs, and responsible for pile-up events in analog electronics. Experimental data has been recorded by the Nuclear Structure Group at Lund University for 48Ca/50Ti + nat. LÄS MER

  3. 2. Uranium nitride synthesis by gas/gas reaction of UF6 and NH3

    Master-uppsats, KTH/Fysik

    Författare :Serena Ambrosino; [2024]
    Nyckelord :Uranium nitride; synthesis; ammonolysis; uranium hexafluoride; uranium tetrafluoride; ammonia; X-ray diffraction; microscopy; Urannitrid; syntes; ammonolys; uranhexafluorid; urantetrafluorid; ammoniak; röntgendiffraktion; mikroskopi;

    Sammanfattning : This thesis project aims to develop an innovative technique for the production of high-purity uranium nitride (UN) through the ammonolysis of fluorides. The desired objective is to perform a controlled gas/gas reaction between uranium hexafluoride (UF6) and ammonia (NH3) at 800°C. LÄS MER

  4. 3. Vad som lämnades i jorden: Det radioaktiva arvet

    Kandidat-uppsats, Lunds universitet/Statsvetenskapliga institutionen

    Författare :Jacob Lenz; [2023]
    Nyckelord :Depleted uranium; Just war theory; Genevekonventionen; folkrätt; The principle of distinction; the principle of proportionality; the principle of restorative care; Law and Political Science;

    Sammanfattning : War has for a long time been fought at the expense of civilians. Depleted uranium has been one such object used in war that in the end would leave its mark on the civilian population and still today is the subject of discussions regarding its use. LÄS MER

  5. 4. Experimental studies of radiation damage in uranium nitride

    Master-uppsats, KTH/Fysik

    Författare :Maria Giamouridou; [2023]
    Nyckelord :uranium nitride nuclear fuel; advanced nuclear fuel; uranium nitride fabrication; uranium nitride characterisation; Spark Plasma Sintering; proton irradiation; irradiation damage; TANDEM accelerator; irradiation induced cracking; irradiation induced hardening; irradiation induced swelling; hydrogen implantation; dislocation loops; kärnbränsle av urannitrid; avancerat kärnbränsle; tillverkning av urannitrid; karakterisering av urannitrid; Spark Plasma Sintering; protonbestrålning; strålningsskador; TANDEM-accelerator; strålningsinducerad sprickbildning; strålningsinducerad härdning; strålningsinducerad svällning; väteimplantation; dislokationsloopar;

    Sammanfattning : The effect of proton (H+) irradiation on uranium mononitride (UN) and UN compositefuel with 10 at.% ZrN (UN10at%ZrN) was examined. Protons of 2 MeV with fluences of1E17, 1E18, 1E19 and 1E20 ions/cm2 were accelerated towards the fabricated samples in orderto investigate the evolution of the micro-structure. LÄS MER

  7. 5. Tillverkning av kalibrerstandard förämnesbestämning i kärnbränslen

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Materialteori

    Författare :Isak Lundell; Sven Ekman; [2023]
    Nyckelord :kärnbränsle; kärnkemi; ICPMS; atomkraft; fissionsprodukter; transuran; simulerat bränsle;

    Sammanfattning : The test production of a simulated nuclear fuel, possible to use as a calibration standard was donethru dissolving the preferred dopant-metals in a nitric-salt into weak acid. This solution wasmixed with dissolved uranium-salt to aimed concentration. This was precipitated by rising pHforming metallic-hydroxide. LÄS MER