Eur. Phys. J. A 9, 453-461
Nuclear matter properties and relativistic mean-field theory
K.C. Chung1 - C.S. Wang1,2 - A.J. Santiago1 - J.W. Zhang2
1 Instituto de Física, Universidade do Estado do Rio
de Janeiro, Rio de Janeiro-RJ 20559-900, Brazil
2 Department
of Technical Physics, Peking University, Beijing 100871, China
Received: 5 May 2000 / Revised version: 23 November 2000
Communicated by A. Molinari
Abstract
Nuclear matter properties are calculated in the
relativistic mean-field theory by using a number of different
parameter sets. The result shows that the volume energy a1 and
the symmetry energy J are around the acceptable values
16MeV and 30MeV, respectively; the
incompressibility K0 is unacceptably high in the linear model,
but assumes reasonable value if nonlinear terms are included; the
density symmetry L is around 100MeV for most parameter
sets, and the symmetry incompressibility Ks has positive
sign which is opposite to expectations based on the
nonrelativistic model. In almost all parameter sets there exists
a critical point
,
where the minimum
and the maximum of the equation of state are coincident and the
incompressibility equals zero, falling into ranges
and
;
for a few parameter sets there is no
critical point and the pure neutron matter is predicted to be
bound. The maximum mass MNS of neutron stars is predicted
in the range
,
the
corresponding neutron star radius RNS is in the range
12.2km
km.
PACS
21.65.+f Nuclear matter - 24.10.Jv Relativistic
models - 26.60.+c Nuclear matter aspects of neutron
stars
Copyright Società Italiana di Fisica, Springer-Verlag 2000
