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Title: Nuclear Physics Issues of r-Process Nucleosynthesis

Abstract

Nucleosynthesis theory predicts that about half of the chemical elements above iron are formed in explosive stellar scenarios by the r-process, i.e. a combination of rapid neutron captures, inverse photodisintegrations, and slower {beta}-decays, {beta}-delayed processes, as well as fission and possibly interactions with neutrinos. A correct modelling of this process, therefore, requires the knowledge of nuclear properties very far from stability and a detailed description of the astrophysical environments. With respect to nuclear data, after an initial period of measuring classical 'waiting-point' nuclei with magic neutron numbers, recent investigations have paid special attention to shape transitions and the erosion of classical shell gaps with possible occurrence of new magic numbers. The status of experimental and theoretical nuclear data on masses and {beta}-decay properties will be briefly reviewed, and consequences on the overall r-process matter flow up to the cosmochronometers 232Th and 238U will be discussed.

Authors:
 [1];  [2];  [3]
  1. Institut fuer Kernchemie, Universitaet Mainz (Germany)
  2. (Germany)
  3. (United States)
Publication Date:
OSTI Identifier:
20798326
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 819; Journal Issue: 1; Conference: 12. international symposium on capture gamma-ray spectroscopy and related topics, Notre Dame, IN (United States), 4-9 Sep 2005; Other Information: DOI: 10.1063/1.2187893; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BETA DECAY; CAPTURE; FISSION; MAGIC NUCLEI; NEUTRINOS; NEUTRON REACTIONS; NEUTRONS; NUCLEAR PROPERTIES; NUCLEOSYNTHESIS; PHOTONUCLEAR REACTIONS; R PROCESS; STABILITY; THORIUM 232; URANIUM 238

Citation Formats

Kratz, K.-L., HGF Virtual Institute for Nuclear Structure and Astrophysics, Mainz, and Institute for Structure and nuclear Astrophysics, University of Notre Dame. Nuclear Physics Issues of r-Process Nucleosynthesis. United States: N. p., 2006. Web. doi:10.1063/1.2187893.
Kratz, K.-L., HGF Virtual Institute for Nuclear Structure and Astrophysics, Mainz, & Institute for Structure and nuclear Astrophysics, University of Notre Dame. Nuclear Physics Issues of r-Process Nucleosynthesis. United States. doi:10.1063/1.2187893.
Kratz, K.-L., HGF Virtual Institute for Nuclear Structure and Astrophysics, Mainz, and Institute for Structure and nuclear Astrophysics, University of Notre Dame. Mon . "Nuclear Physics Issues of r-Process Nucleosynthesis". United States. doi:10.1063/1.2187893.
@article{osti_20798326,
title = {Nuclear Physics Issues of r-Process Nucleosynthesis},
author = {Kratz, K.-L. and HGF Virtual Institute for Nuclear Structure and Astrophysics, Mainz and Institute for Structure and nuclear Astrophysics, University of Notre Dame},
abstractNote = {Nucleosynthesis theory predicts that about half of the chemical elements above iron are formed in explosive stellar scenarios by the r-process, i.e. a combination of rapid neutron captures, inverse photodisintegrations, and slower {beta}-decays, {beta}-delayed processes, as well as fission and possibly interactions with neutrinos. A correct modelling of this process, therefore, requires the knowledge of nuclear properties very far from stability and a detailed description of the astrophysical environments. With respect to nuclear data, after an initial period of measuring classical 'waiting-point' nuclei with magic neutron numbers, recent investigations have paid special attention to shape transitions and the erosion of classical shell gaps with possible occurrence of new magic numbers. The status of experimental and theoretical nuclear data on masses and {beta}-decay properties will be briefly reviewed, and consequences on the overall r-process matter flow up to the cosmochronometers 232Th and 238U will be discussed.},
doi = {10.1063/1.2187893},
journal = {AIP Conference Proceedings},
number = 1,
volume = 819,
place = {United States},
year = {Mon Mar 13 00:00:00 EST 2006},
month = {Mon Mar 13 00:00:00 EST 2006}
}