Search for dissertations about: "spontaneous fission"
Showing result 1 - 5 of 7 swedish dissertations containing the words spontaneous fission.
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1. Element 115
Abstract : This thesis is devoted to detailed studies of element 115 decay chains using the highly efficient multi-coincidence alpha, electron, gamma and X-ray detector setup TASISpec at the gas-filled separator TASCA at GSI, Darmstadt, Germany. In a three-week long experiment thirty new decay chains assumed to stem from element 115 isotopes were observed together with the very first detections of gamma rays and potential X-rays from these nuclei. READ MORE
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2. Determination of binary fission-fragment yields in the reaction 251Cf(nth, f) and Verification of nuclear reaction theory predictions of fission-fragment distributions in the reaction 238U(n, f)
Abstract : Neutron-induced fission has been studied at different excitation energies of the compound nucleus by measurements on the two fissioning systems, 252Cf* and 239U*.For the first time, the light fission fragment yields from the reaction 251Cf(nth, f) have been measured with high resolution. READ MORE
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3. Spectroscopy along Decay Chains of Element 114, Flerovium
Abstract : This thesis focusses on a nuclear spectroscopy experiment conducted to study α-decay chains stemming from isotopes of flerovium (element Z = 114). An upgraded TASISpec decay station was placed behind the gas-filled separator TASCA at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany. READ MORE
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4. Experimental Studies of the Synthesis and the Survival Probability of Transactinides
Abstract : 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). READ MORE
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5. External Source Effects and Neutronics in Accelerator-driven Systems
Abstract : Transmutation of plutonium and minor actinides inaccelerator-driven systems (ADS) is being envisaged for thepurpose of reducing the long-term radiotoxic inventory of spentnuclear reactor fuel. Consequently, the physics of sub-criticalsystems are being studied in several different experimentalprograms across the world, one of them being the MUSE(MUltiplication of External Source) program. READ MORE