  The innermost ejecta of core-collapse supernovae are considered to be the
sources of some iron-group and heavier nuclei. The ejecta are predominantly
driven by neutrino heating, principally due to neutrino capture on free
neutrons and protons. Such neutrino interaction plays a crucial role for
setting neutron richness in the ejecta. Recent hydrodynamics work with
sophisticated neutrino transport indicates that the ejecta are only mildly
neutron rich or even proton rich. In such conditions a wide variety of
trans-iron isotopes are synthesized, while the neutron richness is insufficient
for the production of r-process nuclei. In this capter, basic concepts of
nucleosynthesis in neutrino-heated ejecta and neutrino-driven winds of
core-collapse supernovae are presented along with latest studies.
Neutrino-heated ejecta indicate the early ejecta component within the first few
seocnds in which anisotropic convective activities of material above the
neutrinosphere become important for nucleosynthesis. Then, neutrino-driven
winds follow, which are approximately isotropic outflows emerging from the
surface of a proto-neutron star . According to such characteristics, studies of
nucleosynthesis here are based on recent multi-dimentional hydrodynamics
simulations and semi-alalytic wind solutions, respectively. These studies
suggest that trans-iron species up to the atomic mass number of 90, as well as
some rare isotopes such as 48Ca and 92Mo, are produced in the neutrino-heated
ejecta. Neutrino-driven winds are unlikely sources of r-process nuclei, but
rather promising sources of proton-rich isotopes up to the atomic number of
110.
