Electronic-momentum distribution in deformed sodium clusters
نویسندگان
چکیده
We present results for electronic momentum distribution n(k) of deformed sodium clusters in the framework of the Kohn-Sham formalism. We discuss properties of both spheroidal clusters and fission configurations. For spheroidal clusters we have analyzed properties of total and single-particle electronic momentum distribution. The results show that deformation has more of an effect on the latter, and that the total quadrupole moment in k space can be used to search the minimum-energy configuration. With regard to fission configurations, we present the behavior of total quadrupole moment for different fission pathways. @S0163-1829~98!07619-X#
منابع مشابه
1 Electric multipole plasmons in deformed sodium clusters
The random-phase-approximation (RPA) method with separable residual forces (SRPA) is proposed for the description of multipole electric oscillations of valence electrons in deformed alkali metal clusters. Both the deformed mean field and residual interaction are derived self-consistently from the Kohn-Sham functional. SRPA drastically simplifies the computational effort which is urgent if not d...
متن کاملTriaxially deformed sodium clusters in a self-consistent microscopic description
We have performed self-consistent Kohn-Sham calculations for the triaxially deformed sodium clusters Nal2 and Nat4. We use the jellium approach and compute the properties of the valence electrons with an exchange-correlation energy functional in the local density approximation. In both clusters a pronounced shape isomerism is obtained. We find a well-developed triaxial groundstate deformation f...
متن کاملTransverse Radiation realized as Deformed Harmonic Oscillators
We present a theory of quantized radiation fields described in terms of qdeformed harmonic oscillators. The creation and annihilation operators satisfy deformed commutation relations and the Fock space of states is constructed in this formalism in terms of basic numbers familiar from the theory of quantum groups. Expressions for the Hamiltonian and momentum arising from deformed Heisenberg rela...
متن کاملSpin Dependent Momentum Distributions in Deformed Nuclei
We study the properties of the spin dependent one body density in momentum space for odd–A polarized deformed nuclei within the mean field approximation. We derive analytic expressions connecting intrinsic and laboratory momentum distributions. The latter are related to observable transition densities in p–space that can be probed in one nucleon knock–out reactions from polarized targets. It is...
متن کاملProbing the angular momentum character of the valence orbitals of free sodium nanoclusters.
Although many properties of polyatomic metal clusters have been rationalized by an electron shell model resembling that used for free atoms, it remained unclear how reliable this analogy is with respect to the angular momentum eigenstate character of the electronic wave functions. We studied free size-selected negatively charged clusters of sodium atoms (Nan-) of approximately spherical shape (...
متن کامل