Neutron-Phonon Interaction in Neutron Star Crusts

Details Neutron-Phonon Interaction in Neutron Star Crusts Neutron-Phonon Interaction in Neutron Star Crusts

1998-01-24

arxiv.org/abs/astro-ph/9801239v2

Astronomy and Astrophysics

Astrophysics

5 pages, Latex, 3 figures; published in Proc. Int. Workshop Hirshegg '98, Nuclear Astrophysics, eds. M. Buballa, W. Noerenberg

Scientific paper

The phonon spectrum of Coulomb lattice in neutron star crusts above the neutron drip density is affected by the interaction with the ambient neutron Fermi-liquid. For the values of the neutron-phonon coupling constant in the range $0.1 \le \lambda \le 1$ an appreciable renormalization of the phonon spectrum occurs which can lead to a lattice instability manifested in an exponential growth of the density fluctuations. The BCS phonon exchange mechanism of superconductivity leads to neutron pairing with a gap in the neutron excitation spectrum comparable to that due to the direct nuclear interaction.

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