Speaker
Gabriel Martínez Pinedo
(GSI Darmstadt))
Description
Independently of the still unclear explosion mechanism for
core-collapse supernovae there will be matter ejected under strong
neutrino fluxes. Depending of the spectral properties of both
neutrinos and antineutrinos the composition of the matter goes from
proton rich to neutron rich. Current supernova simulations suggest
that the early ejecta is proton rich while at latter times we expect
neutron-rich ejecta. Proton-rich ejecta constitute the site a new kind
of rp-process that is catalyzed by antineutrino absorptions in protons
and that we denote as vp-process. The combination of proton-rich
ejecta and mildly neutron-rich ejecta could explain the production of
several light p-nuclei in particular 92,94Mo and 96,98Ru and at the
same time explain the elemental abundances of Sr, Y and Zr seen in
metal poor stars. The r-process is expected to occur in neutron rich
ejecta. Depending in the conditions even the heavier r-process
elements can be produced. In this case fission can play a major role
in understanding the production of r-process elements. In this talk I
will discuss the current theoretical and experimental uncertainties
related to nucleosynthesis in neutrino heated matter and in particular
the role of fission (neutron induced, neutrino induced and
beta-delayed) in r-process nucleosynthesis.
Author
Gabriel Martínez Pinedo
(GSI Darmstadt))
