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The isovector imaginary neutron potential: A key ingredient for the r-process nucleosynthesis

par Goriely, Stéphane ;Delaroche, Julie
Référence AIP Conference Proceedings, 1012, page (350-352)
Publication Publié, 2008

Article révisé par les pairs

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Résumé :

The isovector contribution to the imaginary component of the microscopic optical model potential is adjusted on experimental neutron strength function data. Within the Brückner-Hartree-Fock approximation of Jeukenne-Lejeune-Mahaux, it is shown that experimental data favours a strong isovector component that can have a drastic impact on the radiative neutron capture cross section for neutron-rich nuclei. If confirmed, this result strongly inhibits the resonant capture by exotic nuclei, so that the traditional r-process picture of the fast neutron captures during the nucleosynthesis r-process needs to be revisited in depth.