Collective electronic excitations and their damping in small alkali clusters

✍ Scribed by Yang Wang; Caio Lewenkopf; David Tománek; George Bertsch; Susumu Saito

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 745 KB
• Volume: 205
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)80007-c

✦ Synopsis

We calculate collective electronic excitations and their damping in small Na. and Li. clusters. The ground state properties of these systems are described using the local density approximation, and the electronic excitations by the random phase approximation. The collective excitations in the fust two closed-shdl clusters with n = 2,s atoms are discussed in detail. We find that the coupling of electronic levels to vibrational degrees of freedom accounts quantitatively for the observed width of the collective electronic excitations in alkali dimers. The origin of the aualogous line broadening in Na, is prcsemly uuresolved.