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Title: KADoNiS - The Karlsruhe Astrophysical Database of Nucleosynthesis in Stars

Abstract

The 'Karlsruhe Astrophysical Database of Nucleosynthesis in Stars' (KADoNiS) project is an online database for experimental cross sections relevant to the s process and p process. It is available under http://nuclear-astrophysics.fzk.de/kadonis and consists of two parts. Part 1 is an updated sequel to the previous Bao et al. compilations from 1987 and 2000 for (n,{gamma}) cross sections relevant to the big bang and s-process nucleosynthesis. The second part will be an experimental p-process database, which is expected to be launched in winter 2005/06. The KADoNiS project started in April 2005, and a first partial update is online since August 2005. In this paper we present a short overview of the first update of the s-process database, as well as an overview of the status of stellar (n,{gamma}) cross sections of all 32 p isotopes.

Authors:
 [1];  [2]; ; ;  [1]; ;  [3]
  1. Institut fuer Kernphysik, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe (Germany)
  2. (Switzerland)
  3. Departement Physik und Astronomie, Universitaet Basel, Klingelbergstrasse 82, CH-4056 Basel (Switzerland)
Publication Date:
OSTI Identifier:
20798274
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: 10.1063/1.2187846; (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; ASTROPHYSICS; CAPTURE; CROSS SECTIONS; NEUTRON REACTIONS; NEUTRONS; NUCLEOSYNTHESIS; PHOSPHORUS 32; S PROCESS; STARS

Citation Formats

Dillmann, I., Departement Physik und Astronomie, Universitaet Basel, Klingelbergstrasse 82, CH-4056 Basel, Heil, M., Kaeppeler, F., Plag, R., Rauscher, T., and Thielemann, F.-K.. KADoNiS - The Karlsruhe Astrophysical Database of Nucleosynthesis in Stars. United States: N. p., 2006. Web. doi:10.1063/1.2187846.
Dillmann, I., Departement Physik und Astronomie, Universitaet Basel, Klingelbergstrasse 82, CH-4056 Basel, Heil, M., Kaeppeler, F., Plag, R., Rauscher, T., & Thielemann, F.-K.. KADoNiS - The Karlsruhe Astrophysical Database of Nucleosynthesis in Stars. United States. doi:10.1063/1.2187846.
Dillmann, I., Departement Physik und Astronomie, Universitaet Basel, Klingelbergstrasse 82, CH-4056 Basel, Heil, M., Kaeppeler, F., Plag, R., Rauscher, T., and Thielemann, F.-K.. Mon . "KADoNiS - The Karlsruhe Astrophysical Database of Nucleosynthesis in Stars". United States. doi:10.1063/1.2187846.
@article{osti_20798274,
title = {KADoNiS - The Karlsruhe Astrophysical Database of Nucleosynthesis in Stars},
author = {Dillmann, I. and Departement Physik und Astronomie, Universitaet Basel, Klingelbergstrasse 82, CH-4056 Basel and Heil, M. and Kaeppeler, F. and Plag, R. and Rauscher, T. and Thielemann, F.-K.},
abstractNote = {The 'Karlsruhe Astrophysical Database of Nucleosynthesis in Stars' (KADoNiS) project is an online database for experimental cross sections relevant to the s process and p process. It is available under http://nuclear-astrophysics.fzk.de/kadonis and consists of two parts. Part 1 is an updated sequel to the previous Bao et al. compilations from 1987 and 2000 for (n,{gamma}) cross sections relevant to the big bang and s-process nucleosynthesis. The second part will be an experimental p-process database, which is expected to be launched in winter 2005/06. The KADoNiS project started in April 2005, and a first partial update is online since August 2005. In this paper we present a short overview of the first update of the s-process database, as well as an overview of the status of stellar (n,{gamma}) cross sections of all 32 p isotopes.},
doi = {10.1063/1.2187846},
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}
}
  • The KADoNiS (Karlsruhe Astrophysical Database of Nucleosynthesis in Stars) project is an astrophysical online database for cross sections relevant for nucleosynthesis in the s process and the γ process. The s-process database ( (http://www.kadonis.org)) was started in 2005 and is presently facing its 4th update (KADoNiS v1.0). The γ-process database (KADoNiS-p, (http://www.kadonis.org/pprocess)) was recently revised and re-launched in March 2013. Both databases are compilations for experimental cross sections with relevance to heavy ion nucleosynthesis. For the s process recommended Maxwellian averaged cross sections for kT=5−100 keV are given for more than 360 isotopes between {sup 1}H and {sup 210}Bi. Formore » the γ-process database all available experimental data from (p,γ),(p,n),(p,α),(α,γ),(α,n), and (α,p) reactions between {sup 70}Ge and {sup 209}Bi in or close to the respective Gamow window were collected and can be compared to theoretical predictions. The aim of both databases is a quick and user-friendly access to the available data in the astrophysically relevant energy regions.« less
  • By using updated stellar low-mass stars models, we systematically investigate the nucleosynthesis processes occurring in asymptotic giant branch (AGB) stars. In this paper, we present a database dedicated to the nucleosynthesis of AGB stars: FRANEC Repository of Updated Isotopic Tables and Yields (FRUITY). An interactive Web-based interface allows users to freely download the full (from H to Bi) isotopic composition, as it changes after each third dredge-up (TDU) episode and the stellar yields the models produce. A first set of AGB models, having masses in the range 1.5 {<=}M/M{sub Sun} {<=} 3.0 and metallicities 1 Multiplication-Sign 10{sup -3} {<=} Zmore » {<=} 2 Multiplication-Sign 10{sup -2}, is discussed. For each model, a detailed description of the physical and the chemical evolution is provided. In particular, we illustrate the details of the s-process and we evaluate the theoretical uncertainties due to the parameterization adopted to model convection and mass loss. The resulting nucleosynthesis scenario is checked by comparing the theoretical [hs/ls] and [Pb/hs] ratios to those obtained from the available abundance analysis of s-enhanced stars. On the average, the variation with the metallicity of these spectroscopic indexes is well reproduced by theoretical models, although the predicted spread at a given metallicity is substantially smaller than the observed one. Possible explanations for such a difference are briefly discussed. An independent check of the TDU efficiency is provided by the C-stars luminosity function. Consequently, theoretical C-stars luminosity functions for the Galactic disk and the Magellanic Clouds have been derived. We generally find good agreement with observations.« less
  • There are many common features in nuclear data for energy applications and nuclear cosmology/astrophysics, especially the neutron-capture nucleosynthesis. Therefore it is a natural consequence to think that many of the tools that we have developed for the conventional nuclear-data applications can be applied for a development of a database for nuclear cosmology/astrophysics. However, there are also many features that are uncommon to these fields, so new development is necessary when we think about a database for nuclear cosmology and astrophysics. Such new development will then give us a new horizon for the conventional nuclear data activities as well. In thismore » paper we will show the present status of our activities in this direction, putting emphasis on data relevant to neutron capture nucleosynthesis, namely s- and r-processes.« less
  • We construct a neural network model that predicts the differences between the experimental mass-excess values {delta}Mexp and the theoretical values {delta}MFRDM given by the Finite Range Droplet Model of Moeller et al. This difficult study reveals that subtle regularities of nuclear structure not yet embodied in the best microscopic/phenomenological models of atomic-mass systematics do actually exist. By combining the FRDM and the above neural network model we construct a Hybrid Model with improved predictive performance in the majority of the calculations of the systematics of nuclear mass excess and of related quantities. Such systematics is of current interest among othersmore » in such astrophysical problems as nucleosynthesis processes and the justification of the present abundances.« less
  • Nuclear halo structures and Borromean nuclei have been intensely studied almost two decades. They have a cloud of neutrons and protons extended well beyond the surface of tightly bound core of neutrons and protons which is classically forbidden. Since the extended tail of the valance neutron wave-function of the neutron halos the cross-sections are much larger and their sizes become substantially much larger than the ordinary nuclei. Inferred expectations of halo and Borroeman nuclei in astrophysics due to their novel structures have been suggested to influence the astrophysical reactions, especially in the primordial furnace during the Standard Big Bang Nucleosynthesismore » (SBBN) process. It is seen that the large spatial extension directly implies that both elastic and absorption cross-sections are large for the reactions involving halo nuclei. The Trojan Horse Method (THM) and the Distorted Wave Born Approximation (DWBA) reaction cross-sections calculations are discussed for low energies.« less