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Network calculations for r-process nucleosynthesis

Petermann, I. ; Martínez-Pinedo, G. ; Arcones, A. ; Hix, W. R. ; Kelić, A. ; Langanke, K. ; Panov, I. ; Rauscher, T. ; Schmidt, K.-H. ; Thielemann, F.-K. ; Zinner, N. (2010)
Network calculations for r-process nucleosynthesis.
In: Journal of Physics: Conference Series, 202 (1)
doi: 10.1088/1742-6596/202/1/012008
Article, Bibliographie

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Abstract

The r-process is known to be responsible for the synthesis of about half of the elements heavier than iron, nevertheless its astrophysical site has not yet been clearly ascertained, but observations indicate that at least two possible sites should contribute to the solar system abundance of r-process elements. The r-process being responsible for the production of elements heavier than Z = 56 operates rather robustly always resulting in a similar relative abundance pattern. From the nuclear-physics point of view the r-process requires the knowledge of a large number of reaction rates involving exotic nuclei that are not accessible by experiment and data have to be provided by theoretical predictions. We have developed for the first time a complete database of reaction rates that in addition to neutron-capture rates and β-decay half-lives includes the dominant reactions that can induce fission (neutron-capture, β-decay and spontaneous fission) and the corresponding fission yields. In addition, we have implemented these reaction rates in a fully implicit reaction network. The influence of the nuclear physics input constituted in the reaction rates based on the two mass models FRDM and ETFSI and on the astrophysical conditions simulating a cold or hot environment are examined.

Item Type: Article
Erschienen: 2010
Creators: Petermann, I. ; Martínez-Pinedo, G. ; Arcones, A. ; Hix, W. R. ; Kelić, A. ; Langanke, K. ; Panov, I. ; Rauscher, T. ; Schmidt, K.-H. ; Thielemann, F.-K. ; Zinner, N.
Type of entry: Bibliographie
Title: Network calculations for r-process nucleosynthesis
Language: English
Date: January 2010
Place of Publication: Bristol
Publisher: IOP Publishing
Journal or Publication Title: Journal of Physics: Conference Series
Volume of the journal: 202
Issue Number: 1
Collation: 4 Seiten
DOI: 10.1088/1742-6596/202/1/012008
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Abstract:

The r-process is known to be responsible for the synthesis of about half of the elements heavier than iron, nevertheless its astrophysical site has not yet been clearly ascertained, but observations indicate that at least two possible sites should contribute to the solar system abundance of r-process elements. The r-process being responsible for the production of elements heavier than Z = 56 operates rather robustly always resulting in a similar relative abundance pattern. From the nuclear-physics point of view the r-process requires the knowledge of a large number of reaction rates involving exotic nuclei that are not accessible by experiment and data have to be provided by theoretical predictions. We have developed for the first time a complete database of reaction rates that in addition to neutron-capture rates and β-decay half-lives includes the dominant reactions that can induce fission (neutron-capture, β-decay and spontaneous fission) and the corresponding fission yields. In addition, we have implemented these reaction rates in a fully implicit reaction network. The influence of the nuclear physics input constituted in the reaction rates based on the two mass models FRDM and ETFSI and on the astrophysical conditions simulating a cold or hot environment are examined.

Identification Number: Artikel-ID: 012008
Additional Information:

Nuclear Physics in Astrophysics IV 8–12 June 2009, Laboratori Nazionali di Frascati, Frascati, Italy

Classification DDC: 500 Science and mathematics > 530 Physics
Divisions: 05 Department of Physics
05 Department of Physics > Institute of Nuclear Physics
Date Deposited: 13 Feb 2024 15:38
Last Modified: 13 Feb 2024 15:38
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