Multipair contributions to the spin response of nuclear matter

Details Multipair contributions to the spin response of nuclear matter Multipair contributions to the spin response of nuclear matter

2002-08-26

arxiv.org/abs/astro-ph/0208453v1

Phys.Rev. C66 (2002) 065803

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1103/PhysRevC.66.065803

We analyse the effect of non-central forces on the magnetic susceptibility of degenerate Fermi systems. These include the presence of contributions from transitions to states containing more than one quasiparticle-quasihole pair, which cannot be calculated within the framework of Landau Fermi-liquid theory, and renormalization of the quasiparticle magnetic moment, as well as explicit non-central contributions to the quasiparticle interaction. Consequently, the relationship between the Landau parameters and the magnetic susceptibility for Fermi systems with non-central forces is considerably more complicated than for systems with central forces. We use sum-rule arguments to place a lower bound on the contribution to the static susceptibility coming from transitions to multipair states.

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