Sökning: "combined effects of QED and correlation"

Hittade 2 avhandlingar innehållade orden combined effects of QED and correlation.

1. 1. Towards a relativistically covariant many-body perturbation theory - With numerical implementation to helium-like ions

   Författare :Daniel Hedendahl; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; many-body perturbation theory; bound state QED; helium-like ions; Green s operator; covariant evolution operator; combined effects of QED and correlation; atomic structure calculations;

   Sammanfattning : The experimental results for simple atomic systems have become more and more accurate and in order to keep up with the experimental achievements the theoretical procedures have to be refined. Recent accurate experimental results obtained for helium-like ions in the low- and moderate-Z regions proclaim the importance of theoretical calculations that combines relativistic, QED and electron correlation effects. LÄS MER

3. 2. High Resolution Dielectronic Recombination Studies at CRYRING

   Författare :Zong Weiyong; Donald M Crothers; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; fysik;

   Sammanfattning : The works presented in this thesis are based on experimental studies on dielectronic recombination (DR) at the Stockholm storage ring CRYRING. The experiments have taken full advantage of the low energy spread of the electron beam provided by the electron cooler of the ring. Energy resolution of 10-1eV at full width half maximum has been achieved. LÄS MER