Calculations of fission rates for r-process nucleosynthesis

Panov, I. V. and Kolbe, E. and Pfeiffer, B. and Rauscher, T. and Kratz, K. L. and Thielemann, F. K.. (2005) Calculations of fission rates for r-process nucleosynthesis. Nuclear physics. A, Nuclear and hadronic physics, Vol. 747, H. 2-4. pp. 633-654.

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Official URL: http://edoc.unibas.ch/dok/A5253968

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Fission plays an important role in the r-process which is responsible; not only for the yields of transuranium isotopes, but may have a strong influence on the formation of the majority of heavy nuclei due to fission recycling. We present calculations of beta-delayed and neutron-induced fission rates, taking into account different fission barriers predictions and mass formulae. It is shown that an increase of fission barriers results naturally in a reduction of fission rates, but that nevertheless fission leads to the termination of the r-process. Furthermore, it is discussed that the probability of triple fission could be high for A < 260 and have an effect on the formation of the abundances of heavy nuclei. Fission after beta-delayed neutron emission is discussed as well as different aspects of the influence of fission upon r-process calculations.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Thielemann, Friedrich-Karl and Kolbe, Edwin and Rauscher, Thomas
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:North Holland
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:25
Deposited On:22 Mar 2012 13:46

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