Search for dissertations about: "AMS"

Showing result 6 - 10 of 78 swedish dissertations containing the word AMS.

  2. 6. Iodine Isotopes (129I and 127I) in the Baltic Sea   : Tracer applications & environmental impact

    Author : Peng Yi; Ala Aldahan; Glen Snyder; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; radioactive 129I; stable 127I; AMS; iodine species; nuclear reprocessing facilities; tracers; Baltic Sea; circulation; water exchange; environmental impact;

    Abstract : 129I is a radioactive isotope (T1/2= 15.7 million years) produced through natural and anthropogenic pathways, but the anthropogenic production is presently dominating the Earth’s surface environments. READ MORE

  4. 7. Anthropogenic 129I Traced in Environmental Archives by Accelerator Mass Spectrometry

    Author : Edvard Englund; Göran Possnert; Ala Aldahan; José María López-Gutiérrez; Uppsala universitet; []
    Keywords : Engineering physics; iodine-129; sediment; aerosol; reprocessing; Chernobyl; nuclear weapon; Sellafield; La Hague; accelerator mass spectrometry; AMS; Teknisk fysik;

    Abstract : Since the beginning of the nuclear era, starting during the 1940s, large amount of radioactivity has been released into the environment. This thesis deals with the temporal and spatial distribution of the anthropogenic radioisotope 129I (T1/2= 15.7 Myr) in northern Europe. READ MORE

  5. 8. Iodine Isotopes and their Species in Surface Water from the North Sea to the Northeastern Atlantic Ocean

    Author : Peng He; Ala Aldahan; Per Roos; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; iodine isotopes; 129I; 127I; oceans; North Sea; speciation; Atlantic Ocean; English Channel; Celtic Sea; AMS; iodine chemistry; geochemistry; Earth Science with specialization in Environmental Analysis; Geovetenskap med inriktning mot miljöanalys;

    Abstract : Huge amounts of anthropogenic 129I have been and still are released to the environment through liquid and gaseous discharges from the nuclear fuel reprocessing facilities worldwide and in particular the ones in Europe. Most of this 129I signal has been accumulated in the marine environment which plays a major role in the iodine natural pool. READ MORE

  6. 9. The dynamic emplacement of felsic magma in the upper crust

    Author : Tobias Mattsson; Steffi Burchardt; Karen Mair; Christoph Breitkreuz; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; laccolith; cryptodome; magma emplacement; magma flow; magma rheology; granite; rhyolite; pluton; AMS; XCT; thermobarometry; Geovetenskap med inriktning mot mineralogi; petrologi och tektonik; Earth Science with specialization in Mineral Chemistry; Petrology and Tectonics;

    Abstract : Felsic magma intrudes earth’s upper crust through a variety of mechanisms. Magma intrusion growth and shape have mainly been explained in terms of host rock properties and intrusion depth, while considering the magma as an overpressurised fluid. READ MORE

  7. 10. Quantifying strain in analogue models simulating fold-and-thrust belts using magnetic fabric analysis

    Author : Thorben Schöfisch; Hemin Koyi; Bjarne Almqvist; Stefan Luth; Ram Weinberger; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; analogue modelling; AMS; fold-and-thrust belt; strain distribution; décollement friction; magnetic fabric analysis;

    Abstract : Applying the anisotropy of magnetic susceptibility to analogue models provides detailed insights into the strain distribution and quantification of deformation within contractional tectonic settings like fold-and-thrust belts (FTBs). Shortening in FTBs is accommodated by layer-parallel shortening, folding, and thrusting. READ MORE