8-12 juin, 2014


A unified nucleosynthetic site for the production of heavy isotopes and p-nuclei

Amir Ouyed Hernandez (University of Calgary)

Rachid Ouyed, Denis Leahy

Currently, A large percentage of elements heavier than A > 90 are thought to be made by the rapid neutron capture process (r-process). Furthermore there are 35 proton-rich stable isotopes (p-nuclei) that were not produced by neutron capture processes. Some r-process candidate sites are supernovae, neutron star mergers, and quark-novae. However many r-process models strongly underproduce 90 < A < 130 isotopes. We argue that a fragmentation mechanism is necessary to break heavy r-process A >130 nuclei into 90 130 r-process nuclei are fragmented by this heavy-ion spallation into A<130, enhancing the 90 < A < 130 mass range and producing all 35 p-nuclei.
(doit être confirmé par le SOC)