Sökning: "99Tc"

Visar resultat 1 - 5 av 6 avhandlingar innehållade ordet 99Tc.

  1. 1. Development and Applications of some Radioanalytical Procedures: Analysis of β- and α-Emitting Radionuclides Using Radiometric and ICP-MS Detection Methods

    Författare :Henrik Ramebäck; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; diffusion; plutonium; 90Sr; curium; uranium; 99Tc; bentonite clay; analysis; UO2 fuel; leaching; americium; neptunium;

    Sammanfattning : Analyses of radionuclides are important in environmental monitoring and in research. However, as in the analysis of many other species, interferences may be a problem. In a-spectrometric detection, 238Pu interferes with 241Am, owing to their similar decay energies. LÄS MER

  3. 2. Differentiation of renal oncocytoma from renal cell carcinoma by means of ⁹⁹Tc-Sestamibi SPECT/CT

    Författare :Antonios Tzortzakakis; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Purpose: An increasing body of literature indicates the beneficial role of [99m]Tc-Sestamibi SPECT/CT in the non-invasive differentiation of renal oncocytoma (RO) from renal cell carcinoma (RCC). This thesis presents a comprehensive approach of [99m]Tc-Sestamibi SPECT/CT examination following the implementation of quantitative tools in addition to visual assessment. LÄS MER

  4. 3. Studies of Long-lived Radionuclides in the Environment - with Emphasis on 99Tc, 237Np and Pu Isotopes

    Författare :Patric Lindahl; Lund Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Nuclear medicine; radiobiology; Nukleärmedicin; radiobiologi; atomic ratio; environmental samples; nuclear weapons fallout; Chernobyl fallout; bioindicators; activated carbon; Sellafield; plutonium; neptunium; ICP-MS; technetium;

    Sammanfattning : Studies of the long-lived anthropogenic radionuclides 99Tc, 237Np, 239Pu and 240Pu were performed in marine and terrestrial areas contaminated by different accidental and controlled releases of radioactive materials. The three main sources discussed in this thesis are nuclear weapons tests, nuclear reprocessing plants and the Chernobyl accident. LÄS MER

  5. 4. Analysis of β--emitting radionuclides: 90Sr and 99Tc : applied in spent nuclear fuel research Henrik Ramebäck

    Författare :Henrik Ramebäck; Chalmers tekniska högskola; []
    Nyckelord :diffusion; 99< sub> Tc; apparent diffusivity; ICP-MS; spent nuclear fuel; analysis; 90< sub>Sr; released fraction;

    Sammanfattning : .... LÄS MER

  7. 5. Collective Excitations in Transitional Nuclei Studied by Means of gamma-ray Spectroscopy and Lifetime Measurements

    Författare :Hongjie Li; Bo Cederwall; Radomira Lozeva; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Despite that it is more than 100 years since the atomic nucleus was first dis- covered by Ernest Rutherford and coworkers, many of its features still elude our understanding. The fact that the fundamental interactions between the nuclear constituents; nucleons, and ultimately quarks, are not yet known in detail, and the complexity of the nuclear many-body system compound the great challenges facing theoretical interpretations of experimental data. LÄS MER