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Title: The r-process nucleosynthesis: Nuclear physics challenges

Abstract

About half of the nuclei heavier than iron observed in nature are produced by the socalled rapid neutron capture process, or r-process, of nucleosynthesis. The identification of the astrophysics site and the specific conditions in which the r-process takes place remains, however, one of the still-unsolved mysteries of modern astrophysics. Another underlying difficulty associated with our understanding of the r-process concerns the uncertainties in the predictions of nuclear properties for the few thousands exotic neutron-rich nuclei involved and for which essentially no experimental data exist. The present contribution emphasizes some important future challenges faced by nuclear physics in this problem, particularly in the determination of the nuclear structure properties of exotic neutron-rich nuclei as well as their radiative neutron capture rates and their fission probabilities. These quantities are particularly relevant to determine the composition of the matter resulting from the r-process. Their impact on the r-abundance distribution resulting from the decompression of neutron star matter is discussed.

Authors:
 [1]
  1. Institut d'Astronomie et d'Astrophysique, Universite Libre de Bruxelles Campus de la Plaine, CP 226, 1050 Brussels (Belgium)
Publication Date:
OSTI Identifier:
22075620
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1491; Journal Issue: 1; Conference: Conference on nuclear structure and dynamics 2012, Opatija (Croatia), 9-13 Jul 2012; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; CAPTURE; ELEMENT ABUNDANCE; FISSION; FISSION NEUTRONS; IRON ISOTOPES; NEUTRON REACTIONS; NEUTRON STARS; NEUTRON-RICH ISOTOPES; NUCLEAR MATTER; NUCLEAR PROPERTIES; NUCLEAR STRUCTURE; NUCLEOSYNTHESIS; R PROCESS

Citation Formats

Goriely, S. The r-process nucleosynthesis: Nuclear physics challenges. United States: N. p., 2012. Web. doi:10.1063/1.4764253.
Goriely, S. The r-process nucleosynthesis: Nuclear physics challenges. United States. doi:10.1063/1.4764253.
Goriely, S. Sat . "The r-process nucleosynthesis: Nuclear physics challenges". United States. doi:10.1063/1.4764253.
@article{osti_22075620,
title = {The r-process nucleosynthesis: Nuclear physics challenges},
author = {Goriely, S.},
abstractNote = {About half of the nuclei heavier than iron observed in nature are produced by the socalled rapid neutron capture process, or r-process, of nucleosynthesis. The identification of the astrophysics site and the specific conditions in which the r-process takes place remains, however, one of the still-unsolved mysteries of modern astrophysics. Another underlying difficulty associated with our understanding of the r-process concerns the uncertainties in the predictions of nuclear properties for the few thousands exotic neutron-rich nuclei involved and for which essentially no experimental data exist. The present contribution emphasizes some important future challenges faced by nuclear physics in this problem, particularly in the determination of the nuclear structure properties of exotic neutron-rich nuclei as well as their radiative neutron capture rates and their fission probabilities. These quantities are particularly relevant to determine the composition of the matter resulting from the r-process. Their impact on the r-abundance distribution resulting from the decompression of neutron star matter is discussed.},
doi = {10.1063/1.4764253},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1491,
place = {United States},
year = {2012},
month = {10}
}