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Isovector Response and Energy-weighted Sums in Hot Nuclei by V.M. Kolomietz; S.V. Lukyanov; O.I. Davidovskaya is a Physics and Astronomy article available to read on EtoBox.

What is Isovector Response and Energy-weighted Sums in Hot Nuclei about?

We investigate the collective response function and the energy-weighted sums (EWS) m k for isovector mode in hot nuclei. The approach is based on the collisional kinetic theory and takes into consideration the temperature and the relaxation effects. We have evaluated the temperature dependence of the adiabatic, E 1 = m 1 /m -1 , and scaling, E 3 = √ m 3 /m 1 , energy centroids of the isovector giant dipole resonances (IVGDR). The centroid energy E 3 is significantly influenced by the Fermi surface distortion effects and, in contrast to the isoscalar mode, shows much weaker variation with temperature. Taking into account a connection between the isovector sound mode and the corresponding surface vibrations we have established the A-dependence of the IVGDR centroid energy which is in a good agreement with experimental data. We have shown that the enhancement factor for the "model independent" sum m 1 is only slightly sensitive to the temperature change.

Who reads Isovector Response and Energy-weighted Sums in Hot Nuclei?

Author

V.M. Kolomietz; S.V. Lukyanov; O.I. Davidovskaya

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0375-9474)

Published

2009

Language

EN

Field

Physics and Astronomy (Physical Sciences)