Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/45452
Title: Incompressibility of neutron-rich matter
Author: Piekarewicz, J.
Centelles Aixalà, Mario
Keywords: Física nuclear
Magnetoresistència
Estructura nuclear
Constitució de la matèria
Nuclear physics
Magnetoresistance
Nuclear structure
Constitution of matter
Issue Date: 2009
Publisher: American Physical Society
Abstract: The saturation properties of neutron-rich matter are investigated in a relativistic mean-field formalism using two accurately calibrated models: NL3 and FSUGold. The saturation properties density, binding energy per nucleon, and incompressibility coefficient are calculated as a function of the neutron-proton asymmetry α≡(N-Z)/A to all orders in α. Good agreement (at the 10% level or better) is found between these numerical calculations and analytic expansions that are given in terms of a handful of bulk parameters determined at saturation density. Using insights developed from the analytic approach and a general expression for the incompressibility coefficient of infinite neutron-rich matter, i.e., K0(α)=K0+Kτα2+ , we construct a hybrid model with values for K0 and Kτ as suggested by recent experimental findings. Whereas the hybrid model provides a better description of the measured distribution of isoscalar monopole strength in the Sn isotopes relative to both NL3 and FSUGold, it significantly underestimates the distribution of strength in 208Pb. Thus, we conclude that the incompressibility coefficient of neutron-rich matter remains an important open problem.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevC.79.054311
It is part of: Physical Review C, 2009, vol. 79, num. 5, p. 054311-1-054311-11
Related resource: http://dx.doi.org/10.1103/PhysRevC.79.054311
URI: http://hdl.handle.net/2445/45452
ISSN: 0556-2813
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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