Search for dissertations about: "superheavy elements"

Found 4 swedish dissertations containing the words superheavy elements.

2. 1. Element 115

   Author : Ulrika Forsberg; Kärnfysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; superheavy elements; element 115; new elements; alpha decay; X rays; gamma rays; nuclear structure; spontaneous fission; Fysicumarkivet A:2016:Forsberg; kärnstruktur; supertunga grundämnen; nya grundämnen; alfasönderfall; röntgenstrålning; gammastrålning; spontan fission; element 115; spektroskopi;

   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

4. 2. Nuclear fission and fusion in a random-walk model

   Author : Martin Albertsson; Matematisk fysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; fission; Brownian shape motion; energy partition; neutron multiplicity; kinetic energy; fusion; superheavy elements; quasifission; Fysicumarkivet A:2021:Albertsson;

   Abstract : This dissertation deals with theoretical descriptions of nuclear fission and synthesis of superheavy elements via fusion. The associated shape evolutions are treated using a random-walk approach where both the potential energy and the nuclear level density influence the dynamics. READ MORE

5. 3. Spectroscopy along Decay Chains of Element 114, Flerovium

   Author : Anton Såmark-Roth; Kärnfysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Superheavy elements; Flerovium; Nuclear Structure; Spectroscopy; Alpha decay; Electromagnetic decay; Spontaneous fission; Germanium detectors; Fysicumarkivet A:2021:Såmark-Roth;

   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

6. 4. Experimental Studies of the Synthesis and the Survival Probability of Transactinides

   Author : Chariklia Rouki; Kjell Aleklett; Lars Westerberg; Matti Leino; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; transactinides; synthesis of superheavy elements; hot fusion; element 112; survival probability; Γn Γf; Kärnfysik; Nuclear physics; Kärnfysik; Nuclear Physics; kärnfysik;

   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