Search for dissertations about: "nuclear structure"

Showing result 11 - 15 of 533 swedish dissertations containing the words nuclear structure.

2. 11. Safety Reviews of Technical System Modifications in the Nuclear Industry

   Author : Thomas Falk; Sven-Ove Hansson; Teemu Reiman; KTH; []
   Keywords : safety; safety review; nuclear; nuclear power plant; process; process improvement; action research; experience feedback;

   Abstract : The function of safety reviews (here understood as expert judgements on proposals for design modifications and redesign of technical systems in commercial Nuclear Power Plants, supported by formalised safety review processes) plays a fundamental role for safety in nuclear installations. The primary aims of the presented case studies includes: critically examining and identifying the main areas for improvement of the existing technical safety review process as it is conducted at a Swedish nuclear power plant, developing a new process, and evaluating whether any improvements were accomplished. READ MORE

4. 12. Rigidity of the Doubly-Magic 100Sn Core

   Author : Matej Lipoglavsek; Partikel- och kärnfysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; in-beam gamma-ray spectrscopy; nuclear structure; fusion-evaporation reactions; nuclear shell model; quadrupole polarization charge; doubly-magic nucleus; Nuclear physics; Kärnfysik; Fysicumarkivet A:1998:Lipoglavšek;

   Abstract : The doubly magic nucleus 100Sn represents a crucial test for the nuclear shell model, which is a widely used model for a quantitative description of nuclei. Excited states in 100Sn are experimentally not accessible with present day techniques, but it is possible to gain insight into its structure by studying the properties of excited states of neighboring nuclei. READ MORE

5. 13. Quantum-state Selective Nuclear Decay Spectroscopy

   Author : Ch. Lorenz; Kärnfysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; nuclear structure; alpha decay; beta decay; gamma rays; spectroscopy; Penning traps; shell-model calculations; Geant4 Monte Carlo Simulations;

   Abstract : This thesis focusses on the results of two experiments employing Penning traps to prepare pure beams of the 213Ra ground state and 127Cd, which were then studied with the decay-spectroscopy setup TASISpec. The experiments were conducted with SHIPTRAP at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany, and JYFLTRAP at the IGISOL Accelerator Facility at the University of Jyväskylä, Finland. READ MORE

6. 14. Hyperfine structure and hyperfine anomaly investigations

   Author : Thomas Nilsson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; nuclear moments; hyperfine structure; Radio-frequence spectroscopy; Bohr-Weisskopf effect; hyperfine anomaly; neutralizer for ions; diode laser; Ta; atomic beam; ABMR; magnetic fields; high resolution laser spectroscopy;

   Abstract : .... READ MORE

7. 15. Structural integrity of prestressed nuclear reactor containments

   Author : Patrick Anderson; Avdelningen för Konstruktionsteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; steel liner; reliability; relaxation; shrinkage; creep; loss of prestress; tendon; Nuclear; containment; design pressure; Construction technology; Anläggningsteknik;

   Abstract : A nuclear power plant is provided with an extensive defense intended to prevent radioactive discharge in case of a reactor accident. This defense is built up of several independent safety barriers, where the reactor containment constitutes the last barrier to the environment. READ MORE