Nuclear giant resonances and linear response

被引：0
|
作者：
P. -G. Reinhard
Lu Guo
J. A. Maruhn
机构：
[1] Universität Erlangen,Institut für Theoretische Physik II
[2] Universität Frankfurt,Institut für Theoretische Physik
来源：
The European Physical Journal A | 2007年 / 32卷
关键词：
21.10.Re Collective levels; 21.60.Jz Hartree-Fock and random-phase approximations; 24.30.Cz Giant resonances;
D O I：
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摘要：
We search for nonlinear effects in nuclear giant resonances (GRs), in particular the isovector dipole and the isoscalar quadrupole modes. To that end, we employ a spectral analysis of time-dependent Hartree-Fock (TDHF) dynamics using Skyrme forces. Based on TDHF calculations over a wide range of excitation amplitudes, we explore the collectivity and degree of harmonic motion in these modes. Both GR modes turn out to be highly harmonic in heavy nuclei from A = 100 on. There is no trace of a transition to irregular motion and multiple resonances are predicted. Slight anharmonicities are seen for light nuclei, particularly for 16O. These are mainly caused by the spin-orbit splitting.
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页码：19 / 23
页数：4
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