The role of fission in the r-process

Martinez-Pinedo, G. and Mocelj, D. and Zinner, N. T. and Kelic, A. and Langanke, K. and Panov, I. and Pfeiffer, B. and Rauscher, T. and Schmidt, K. -H. and Thielemann, F. -K.. (2007) The role of fission in the r-process. In: Progress in particle and nuclear physics, Vol. 59, No. 1. Oxford, pp. 199-205.

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Official URL: http://edoc.unibas.ch/dok/A5253884

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We have developed a full set of fission rates that include spontaneous fission, neutron-induced fission, beta-delayed fission and, neutrino-induced fission, that are supplemented with realistic distributions of fission yields. Using this new input data we have carried out r-process calculations assuming adiabatic expansions that mimic the conditions achieved in the supernova neutrino driven wind. We have explored the sensitivity of the final abundances to different mass models. The resulting abundance distribution turns out to be very sensitive to the strength of the N = 82 shell gap far from stability. Mass models with a strong shell gap converge to an r-process distribution that is independent of the initial conditions once fission sets in. This convergence is not achieved in mass models with a quenched N = 82 shell gap. (c) 2007 Published by Elsevier B.V.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Thielemann, Friedrich-Karl and Rauscher, Thomas
Item Type:Conference or Workshop Item, refereed
Conference or workshop item Subtype:Conference Paper
Publisher:Pergamon Press
Note:Publication type according to Uni Basel Research Database: Conference paper
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Last Modified:22 Mar 2012 14:27
Deposited On:22 Mar 2012 13:56

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