  We propose a $(p,xn)$ mechanism with dynamic production as a new set of
nuclear reactions that could produce high density neutrons and explain the r-
and rp-elements. We calculate the rate of thorium and uranium produced by our
proposed mechanism and show that it is compatible with different stellar
conditions found in explosive events at an initial temperature of $T \geq
3\times 10^{9} K$ with a "freeze-out" by a neutrino-driven wind. We show that
charged particle reactions could explain the discrepancies in the abundances of
${}^{232}Th$ and ${}^{235,238}U$ nucleochronometers. We extend the endpoint of
the rapid proton (rp) process far beyond the previous work by showing that
$(p,xn)$ reactions could contribute to the nucleosynthesis of heavy stable
neutron deficient nuclides, like ${}^{190}Pt$, ${}^{184}Os$, ${}^{180}W$ and
${}^{174}$Hf. This implies in a broader definition of the rp-process and has
important consequences for the nucleosynthesis of heavy elements. We show that
we did not need to assume an extreme condition for the drip line of super
neutron-rich nuclei.
