Sökning: "fysik"
Visar resultat 31 - 35 av 6377 avhandlingar innehållade ordet fysik.
31. Nuclear symmetry energy and neutron-proton pair correlations in microscopic mean field theory
Sammanfattning : A major task of nuclear structure theory is to develop an effective interaction that is capable to predict properties of nuclei under extreme conditions. In this thesis three different areas of effective interactions have been studied: i) the density dependence, which is of importance for the understanding of neutron stars and neutron rich nuclei; ii) the symmetry energy which governs the evolution of the binding energy with changing N/Z ratio; and iii) the neutron proton pairing energy. LÄS MER
32. Diode-pumped rare-earth-doped quasi-three-level lasers
Sammanfattning : Many rare-earth-doped materials are suitable for laser operation and this thesis focuses on diode-pumped solid-state lasers employing crystals doped with the trivalent rare-earth ions neodymium (Nd3+), ytterbium (Yb3+) and erbium (Er3+). Especially, the quasi-three-level transitions in Nd and Yb have been studied as well as the eye-safe three-level transition around 1. LÄS MER
33. Spectroscopy of neutron deficient nuclei in the A=90 and A=170 mass regions
Sammanfattning : .... LÄS MER
34. Superdeformed states in A90 nuclei
Sammanfattning : .... LÄS MER
35. A multi-prism lens for hard X-Rays
Sammanfattning : This thesis describes a new type of refractive lens for hardx-rays. It is shown that a linear array of prisms, slightlyinclined with respect to the optical axis, will form a linefocus at a certain distance from the lens. Hence, the namemulti-prism lens. LÄS MER
