Sökning: "Kärnfysik"

Visar resultat 1 - 5 av 154 avhandlingar innehållade ordet Kärnfysik.

  1. 1. Experimental Studies of the Synthesis and the Survival Probability of Transactinides

    Detta är en avhandling från Uppsala : Institutionen för strålningsvetenskap

    Författare :Chariklia Rouki; Uppsala universitet.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; transactinides; synthesis of superheavy elements; hot fusion; element 112; survival probability; Γn Γf; Kärnfysik; NATURAL SCIENCES Physics Nuclear physics; NATURVETENSKAP Fysik Kärnfysik; kärnfysik; Nuclear Physics;

    Sammanfattning : In 1999 scientists in Dubna announced the successful synthesis of the nucleus 283112 by the reaction 48Ca+ 238U, with a cross-section of 5.0 pb. The isotope was found to decay by spontaneous fission (t1/2=81 s). LÄS MER

  2. 2. Double Pion Production in the dd to αππ reaction

    Detta är en avhandling från Uppsala : Avdelningen för kärnfysik

    Författare :Samson Keleta; Pia Thörngren Engblom; Bo Höistad; Hans Ströher; [2008]
    Nyckelord :Nuclear physics; ABC effect; double pion; Kärnfysik; kärnfysik; Nuclear Physics;

    Sammanfattning : The reaction dd → 4Heππ has been measured exclusively for the first time. The measurements were performed at Td = 712 MeV and Td = 1029 MeV, with the WASA detector assembly at CELSIUS (Uppsala-Sweden). The aim was to investigate a long standing puzzle, the so called ABC effect. LÄS MER

  3. 3. Calculation and Measurement of the Neutron Emission Spectrum due to Thermonuclear and Higher-Order Reactions in Tokamak Plasmas

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Luigi Ballabio; Jef Ongena; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; Kärnfysik; NATURAL SCIENCES Physics Nuclear physics; NATURVETENSKAP Fysik Kärnfysik; Applied Nuclear Physics; tillämpad kärnfysik;

    Sammanfattning : A series of analytic and numerical models have been developed for the prediction and interpretation of the energy spectrum of the neutron emission from thermonuclear deuteriumtritium (DT) plasmas. The main component of the neutron emission, due to reactions between thermal fuel ions, has been modeled as well as minority components due to the presence of fast (supra-thermal) ions. LÄS MER

  4. 4. Neutron induced light-ion production from iron and bismuth at 175 MeV

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Riccardo Bevilacqua; Stephan Pomp; Magnus Wolke; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; neutron induced reactions; light-ion production; quasi-monoenergetic neutron beam; nuclear data; accelerator driven systems; NATURAL SCIENCES Physics Nuclear physics; NATURVETENSKAP Fysik Kärnfysik; Nuclear Physics; kärnfysik; Applied Nuclear Physics; tillämpad kärnfysik;

    Sammanfattning : Light-ions (protons, deuterons, tritons, 3He and α articles) production in the interaction of 175 MeV neutrons with iron and bismuth has been measured using the Medley setup at the The Svedberg Laboratory (TSL) in Uppsala. These measurements have been conducted in the frame of an international collaboration whose aim is to provide the scientific community with new nuclear data of interest for the development of Accelerator Driven Systems, in the range of 20 to 200 MeV. LÄS MER

  5. 5. Experimental studies of neutron-induced reactions in light nuclei

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Somsak Dangtip; Uppsala universitet.; [2000]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; Charged-particle spectrometers; 12C n; xp ; n; xd and n; xt reactions; double-differential cross section; partial and total kerma coefficients; 9Be n; p 9Li reaction; Gamow-Teller unit crosssection; neutron-proton scattering; En=100 MeV; Kärnfysik; NATURAL SCIENCES Physics Nuclear physics; NATURVETENSKAP Fysik Kärnfysik; Applied Nuclear Physics; tillämpad kärnfysik;

    Sammanfattning : Nuclear reactions induced by neutrons in light nuclei at around 100 MeV are studied in this thesis using two detection facilities, MEDLEY and LISA.The measurements were performed at the unique neutron beam line of the The Svedberg Laboratory in Uppsala.The MEDLEY facility has been developed to conduct experiments within, e.g. LÄS MER