Triaxiality and shape-coexistence in the r-process-path
Joakim Viklund
Thursday, 28 May 2009, 10:30
Matfys library
Abstract:
More than fifty percent of the neutron-rich nuclei heavier than iron have
their origin in the r-process that is believed to take place in the hot
insides of core-collapse supernovae. These rapid neutron captures
(r-process) involve many of the extreme neutron rich isotopes far from
beta-stability where experimental knowledge of nuclear properties is
rudimentary. This makes theoretical modeling of the atomic nucleus an
important piece of the stellar nuclear abundance puzzle. In this paper I
will examine the r-process from the perspective of a
macroscopic-microscopic nuclear model developed by P. Möller et. al. based
on the finite range liquid drop macroscopic model with a folded
Yukawa-potential for the shell-correction(FRLDM). In the latest
calculation using this model the possibility for triaxiality was
implemented , a shape-degree of freedom never investigated on this
scale(7206 nuclei) before.