Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pazh....7..219i&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 7, Apr. 1981, p. 219-223.) Soviet Astronomy Letters, vol. 7, Mar.-Apr. 1981, p. 121-124
Astronomy and Astrophysics
Astrophysics
9
Equilibrium Equations, Kinetic Equations, Nuclear Reactions, Statistical Analysis, Stellar Interiors, Stellar Structure, Boundary Value Problems, Nonequilibrium Conditions, Nuclear Astrophysics, Particle Density (Concentration), Relaxation Time, Stellar Evolution, Temperature Dependence, Time Dependence
Scientific paper
Boundary lines in the (rho, T) plane are determined by numerical integration of the nuclear-kinetics equations to limit the applicability of the equilibrium and quasi-equilibrium approximations for nuclear reactions. The reactions under consideration operate at a temperature of 3-5 x 10 to the 9th deg K, with equal numbers of neutrons and protons, and with zero neutron excess. The time scale for relaxation to nuclear quasi-equilibrium in the range from 10 to the 4th to 10 to the 10th g/cu cm is found to be almost independent of density. Gear algorithms are used for the calculations, which are performed to 0.1% accuracy for nuclei with approximately nonzero abundances.
Filippov S. S.
Imshennik Vladimir S.
Khokhlov Alexei M.
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