Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..69..155o&link_type=abstract
Astrophysics and Space Science, vol. 69, no. 1, May 1980, p. 155-176.
Astronomy and Astrophysics
Astrophysics
1
Neutron Stars, Nuclear Chemistry, Nuclides, Stellar Mass Ejection, Stellar Structure, Abundance, Chemical Equilibrium, Electron Capture, Line Spectra, Starquakes, Stellar Radiation, Stellar Spectra, Stellar Temperature
Scientific paper
The paper investigates nuclear processes that might occur in the neutron star fluid released from a neutron star, presumably, as a result of starquakes. The possibility of the r-process is examined and the final abundance distribution, if the r-process occurs, is analyzed. Variation with time of the nuclear composition of the matter expanding from a dense neutron star is calculated using the compressible nuclear mass formula of Baym et al. (1971). It is shown that the temperature of the system decreases monotonically up to the time of the second fission of heavy neutron-rich nuclei, which is followed by a rapid rise to about one billion K. Functional formulas are given for the nuclear composition at high densities together with formulas for the rates of beta-decay and electron-capture, the neutrino energy loss rates, and the energy generation rates by these decay modes.
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