Download or read book Density-functional Description of Metal Clusters written by Karsten Andrae and published by . This book was released on 2003 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clusters occupy the region between atoms and bulk and hence are valuable tools for the understanding of macroscopic properties. A main topic of this work is the time evolution of small and of medium size positively charged sodium clusters. In the sense of a pump- and probe experiment, clusters are exposed to a laser field. After the first pulse, called the pump pulse, another time-shifted probe pulse is sent to the cluster. It is found that the time-evolution of the rms-radius or the quadrupole deformation are accessible with the electronic dipol signal and the amount of emitted electrons. Furthermore spinpolarized clusters are investigated. Moreover we see hints that the bonding type is more covalent than metallic. This has similarities to the trends in (spinsaturated) magnesium clusters where small samples are rather covalent.