Eichler, M. ; Arcones, A. ; Käppeli, R. ; Korobkin, O. ; Liebendörfer, M. ; MartinezPinedo, G. ; Panov, I. V. ; Rauscher, T. ; Rosswog, S. ; Thielemann, F.K. ; Winteler, C. (2016)
The Impact of Fission on RProcess Calculations.
In: Journal of Physics: Conference Series, 665
doi: 10.1088/17426596/665/1/012054
Article, Bibliographie
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Abstract
We have performed rprocess calculations in neutron star mergers (NSM) and jets of magnetohydrodynamically driven (MHD) supernovae. In these very neutronrich environments the fission model of heavy nuclei has an impact on the shape of the final abundance distribution and the second rprocess peak in particular. We have studied the effect of different fission fragment mass distribution models in calculations of lowYₑ ejecta, ranging from a simple parametrization to extensive statistical treatments (ABLA07). The rprocess path ends when it reaches an area in the nuclear chart where fission dominates over further neutron captures. The position of this point is determined by the fission barriers and the neutron separation energies of the nuclei involved. As these values both depend on the choice of the nuclear mass model, so does the rprocess path. Here we present calculations using the FRDM (Finite Range Droplet Model) and the ETFSI (Extended Thomas Fermi with Strutinsky Integral) mass model with the related TF and ETFSI fission barrier predictions. Utilizing sophisticated fission fragment distribution leads to a highly improved abundance distribution.
Item Type:  Article 

Erschienen:  2016 
Creators:  Eichler, M. ; Arcones, A. ; Käppeli, R. ; Korobkin, O. ; Liebendörfer, M. ; MartinezPinedo, G. ; Panov, I. V. ; Rauscher, T. ; Rosswog, S. ; Thielemann, F.K. ; Winteler, C. 
Type of entry:  Bibliographie 
Title:  The Impact of Fission on RProcess Calculations 
Language:  English 
Date:  5 January 2016 
Place of Publication:  Bristol 
Publisher:  IOP Publishing 
Journal or Publication Title:  Journal of Physics: Conference Series 
Volume of the journal:  665 
Collation:  6 Seiten 
DOI:  10.1088/17426596/665/1/012054 
Corresponding Links:  
Abstract:  We have performed rprocess calculations in neutron star mergers (NSM) and jets of magnetohydrodynamically driven (MHD) supernovae. In these very neutronrich environments the fission model of heavy nuclei has an impact on the shape of the final abundance distribution and the second rprocess peak in particular. We have studied the effect of different fission fragment mass distribution models in calculations of lowYₑ ejecta, ranging from a simple parametrization to extensive statistical treatments (ABLA07). The rprocess path ends when it reaches an area in the nuclear chart where fission dominates over further neutron captures. The position of this point is determined by the fission barriers and the neutron separation energies of the nuclei involved. As these values both depend on the choice of the nuclear mass model, so does the rprocess path. Here we present calculations using the FRDM (Finite Range Droplet Model) and the ETFSI (Extended Thomas Fermi with Strutinsky Integral) mass model with the related TF and ETFSI fission barrier predictions. Utilizing sophisticated fission fragment distribution leads to a highly improved abundance distribution. 
Identification Number:  ArtikelID: 012054 
Additional Information:  Erstveröffentlichung; Nuclear Physics in Astrophysics VI (NPA6) 19.24.05. 2013, Lisbon, Portugal 
Classification DDC:  500 Science and mathematics > 530 Physics 
Divisions:  05 Department of Physics 05 Department of Physics > Institute of Nuclear Physics 
Date Deposited:  21 May 2024 07:58 
Last Modified:  21 May 2024 07:58 
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The Impact of Fission on RProcess Calculations. (deposited 14 May 2024 09:55)
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