Physics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aps..haw.sb009t&link_type=abstract
American Physical Society, First Joint Meeting of the Nuclear Physicists of the American and Japanese Physical Societies October
Physics
Scientific paper
It is generally believed that the r-process occurs under explosive conditions at high neutron density, high temperature, and high entropy . It has been discussed, for sometime, that core-collapse supernovae (type II or type Ib SNe) could provide the most likely environment for such r-process nucleosynthesis. In a supernova explosion, it is now commonly accepted that massive Fe cores do not explode in a purely hydrodynamical way, but that they explode with the help of neutrino heating. A potential problem is, however, that a strong neutrino flux hinders the r-process by changing neutrons to protons for its charged current interactions. Therefore, it is needed that a dynamical timescale of the explosion is short enough to make the neutrino-process inactive in the expanding wind when the r-process proceeds. We found a condition that realizes successful r-process with a minimum effect of the neutrino-process in the SN explosion models of relatively massive proto-neutron star ( ~ 2.0 M_solar). In the present work, we update the important reactions in the r-process nucleosynthesis and discuss the possibility that r-process could occur in SN-explosion with a typical proto-neutron star mass ~ 1.4 M_solar.
Kajino Toshitaka
Langanke Karlheinz
Mathews Grant
Sumiyoshi Kousuke
Terasawa Mariko
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