r-Process Nucleosynthesis without Excess Neutrons

Details r-Process Nucleosynthesis without Excess Neutrons r-Process Nucleosynthesis without Excess Neutrons

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phrvl..89w1101m&link_type=abstract

Physical Review Letters, vol. 89, Issue 23, id. 231101

Physics

Nuclear Physics

15

Nucleosynthesis In Novae, Supernovae, And Other Explosive Environments, Nuclear Physics Aspects Of Novae, Supernovae, And Other Explosive Environments, Big Bang Nucleosynthesis, Origin, Formation, And Abundances Of The Elements

Scientific paper

Matter expanding sufficiently rapidly and at high enough entropy per nucleon can enter a heavy-element synthesis regime heretofore unexplored. In this extreme regime, more similar to nucleosynthesis in the early universe than to that typical in stellar explosive environments, there is a persistent disequilibrium between free nucleons and abundant alpha particles, which allows heavy r-process nucleus production even in matter with more protons than neutrons. This observation bears on the issue of the site of the r process, on the variability of abundance yields from r-process events, and on constraints on neutrino physics derived from nucleosynthesis.

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