Sökning: "field emission"

Visar resultat 1 - 5 av 243 uppsatser innehållade orden field emission.

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. Prospects for a Free Electron Laser at the FemtoMAX Beamline

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

   Författare :Johan Holmberg; [2024]
   Nyckelord :Free Electron Lasers; FEL; synchrotron radiation; MAX IV; FemtoMAX; GENESIS 1.3; XFEL; X-rays; soft X-rays; Physics and Astronomy;

   Sammanfattning : A Free Electron Laser (FEL), is a device that generates extremely coherent and brilliant radiation using electrons accelerated to relativistic velocities in a particle accelerator. The process utilises similar equipment to what is used at a synchrotron source like MAX IV, but in addition there is an interaction between the relativistic electron beam and the generated radiation to achieve an exponential growth in radiation intensity. LÄS MER

4. 3. Greenhouse gas emissions from peat soil thawing in spring : a comparison between fertilized and unfertilized soil

   Master-uppsats, SLU/Dept. of Soil and Environment

   Författare :Fanny Otterlin Karlsson; [2024]
   Nyckelord :agricultural soil; carbon dioxide; freeze-thaw cycles; nitrous oxide; soil temperature; water content;

   Sammanfattning : Peat soils drained for agriculture and forestry contribute to a significant amount of greenhouse gas emissions. Nitrous oxide is a greenhouse gas with high warming potential and agriculture in general accounts for about 70 % of nitrous oxide emissions. LÄS MER

5. 4. FIT FOR IMPLEMENTATION? A WPR - analysis of how the European Commission frames implementation challenges in the Fit for 55 proposals

   Magister-uppsats, Göteborgs universitet/Statsvetenskapliga institutionen

   Författare :Nathalie Ahlstedt Mantel; [2023-08-31]
   Nyckelord :;

   Sammanfattning : Climate change is a large scale problem, in need of swift emission reduction to ensure a secure future for all. The EU has a long history of policymaking in the environmental field, and a vast body of previous research dwelve deeper into the development, compliance and results of the legislation. LÄS MER

7. 5. Opposing Attitudes Towards Environmental Taxes: A Price Dilemma? A Case of the Swedish Attitudes on Gasoline Emission Taxes

   Master-uppsats, Göteborgs universitet/Graduate School

   Författare :Ignacio López Casanueva Arturo; Bergström Martin; [2023-06-29]
   Nyckelord :;

   Sammanfattning : This thesis investigates how people’s attitudes toward environmental taxes are shaped and whether changes in end-consumer prices of gasoline have a direct effect on carbon tax perception. A theoretical model is constructed to represent the individual’s choice problem using a utility function. LÄS MER