Relativistic random-phase approximation with density-dependent meson-nucleon couplings

Nikšić, Tamara and Vretenar, Dario and Ring, Peter (2002) Relativistic random-phase approximation with density-dependent meson-nucleon couplings. Physical Review C, 66 (6). pp. 64302-13. ISSN 0556-2813

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The matrix equations of the relativistic random-phase approximation (RRPA) are derived for an effective Lagrangian characterized by density-dependent meson-nucleon vertex functions. The explicit density dependence of the meson-nucleon couplings introduces rearrangement terms in the residual two-body interaction. Their contribution is essential for a quantitative description of excited states. Illustrative calculations of the isoscalar monopole, isovector dipole, and isoscalar quadrupole response of 208Pb, are performed in the fully self-consistent RRPA framework based on effective interactions with a phenomenological density dependence adjusted to nuclear matter and ground-state properties of spherical nuclei. The comparison of the RRPA results on multipole giant resonances with experimental data constrains the parameters that characterize the isoscalar and isovector channel of the density-dependent effective interactions.

Item Type: Article
Keywords: relativistic random phase approximation, density dependent meson-nucleon coupling
Date: December 2002
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2002) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 0119250
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 22 May 2014 18:46
Last Modified: 22 May 2014 18:46

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