Low-energy quadrupole modes in deformed clusters
Abstract
Properties of low-energy (infra-red) quadrupole modes (LEQM) of multipolarity 20, 21 and 22 in deformed sodium clusters are studied within the Kohn-Sham LDA RPA approach. Possible manifestations of LEQM in stimulated Raman adiabatic passage (STIRAP) reaction are discussed. It is shown that, in free light clusters, where the low-energy spectrum is delute, LEQM can be unambiguously identified as particular electron-hole pairs. This gives a chance to reconstruct the mean field level scheme near the Fermi surface. Moreover, due to the connection with electric 21 mode, the scissors mode can be detected. In heavy (supported) oblate clusters, LEQM are in general rather involved. Nevertheless, some interesting 21 and 22 structures determined by specific deformation effects can be resolved. The origin of the structures is discussed in detail.
Cite
@article{arxiv.physics/0308004,
title = {Low-energy quadrupole modes in deformed clusters},
author = {V. O. Nesterenko and W. Kleinig and P. -G. Reinhard and D. S. Dolci},
journal= {arXiv preprint arXiv:physics/0308004},
year = {2007}
}
Comments
12 pages, 6 figures