High Quality Content by WIKIPEDIA articles! High Quality Content by
WIKIPEDIA articles! The S-process or slow-neutron-capture-process
is a nucleosynthesis process that occurs at relatively low neutron
density and intermediate temperature conditions in stars. Under
these conditions the rate of neutron capture by atomic nuclei is
slow relative to the rate of radioactive beta-minus decay. A stable
isotope captures another neutron; but a radioactive isotope decays
to its stable daughter before the next neutron is captured. This
process produces stable isotopes by moving along the valley of
beta-decay stable isobars in the chart of isotopes. The S-process
produces approximately half of the isotopes of the elements heavier
than iron, and therefore plays an important role in the galactic
chemical evolution. The S-process differs from the more rapid
R-process of neutron-capture by its slow rate of neutron captures.
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