Physics – Nuclear Physics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aps..haw.kb005i&link_type=abstract
American Physical Society, First Joint Meeting of the Nuclear Physicists of the American and Japanese Physical Societies October
Physics
Nuclear Physics
Scientific paper
In the past, calculations of the rapid proton-capture process (rp-process) nucleosynthesis have been carried out, assuming an ideal condition of constant temperature and density. These calculations, however, have a potential difficulty that the identified nuclear reaction flow path does not necessarily make a good approximation to the reality for too simplified conditions and that the flow is, in fact, overestimated at very unstable proton-rich nuclei of nuclear physics interest. In order to clarify the real nucleosynthetic path, we have updated our extended nuclear reaction network and carried out numerical simulations of the explosive nucleosynthesis by using a semi-analytic model of nova outbursts. In this model the physical conditions are uniquely determined by fixing envelope mass, white dwarf mass, and initial chemical composition in the envelope. We focus on the explosion on the surface of an oxygen-neon-magnesium white dwarf because the outburst is predicted to be more violently explosive than ever assumed, and therefore various channels of the nuclear reaction flow paths are expected to open. In this talk, we will discuss the main paths under different nova conditions by changing the above three parameters and try to look for the relation between them and the proton separation energy.
Iwamoto Nobuyuki
Kajino Toshitaka
Kubono Shigeru
Nomoto Ken'ichi
Ogawa Kengo
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