Incompressibility of neutron-rich matter

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dc.creatorPiekarewicz, J.
dc.creatorCentelles, M.
dc.date2008-12-24
dc.date2009-04-15
dc.date.accessioned2026-07-07T13:13:54Z
dc.date.available2026-07-07T13:13:54Z
dc.descriptionThe 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 alpha=(N-Z)/A to all orders in alpha. 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(alpha)=K0+Ktau*alpha^{2}+..., we construct a Hybrid model with values for K0 and Ktau 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.
dc.description23 pages, 9 figures, and 4 tables (to appear in PRC)
dc.identifierhttps://arxiv.org/abs/0812.4499
dc.identifierhttp://arxiv.org/abs/0812.4499
dc.identifierPhys.Rev.C79:054311,2009
dc.identifierdoi:10.1103/PhysRevC.79.054311
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/230042
dc.subjectNuclear Theory
dc.subjectNuclear Experiment
dc.titleIncompressibility of neutron-rich matter
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