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The p-process Workshop

10–11 Sept 2009
Max-Planck Institut fuer Extraterrestrische Physik (MPE)
Europe/Berlin timezone

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Contribution List

16 out of 16 displayed
  1. 5. Alpha-induced reaction cross section measurements on 151Eu
    Gyorgy Gyurky (Institute of Nuclear Research (ATOMKI), H-4001 Debrecen, POB. 51, Hungary)
    10/09/2009, 14:00
    In order to extend the available experimental database of alpha-induced reactions relevant for the p-process towards the heavier mass region, the cross section of the 151Eu(alpha,gamma)155Tb and 151Eu(alpha,n)154Tb reactions has been measured using the activation technique. The cross sections have been detemined in the center-of-mass energy range of 11.2 – 17 MeV and 12.3 – 17 MeV for the...
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  2. 8. Proton-induced reactions for the astrophysical p-process
    Zsolt Fulop (ATOMKI, H-4001 Debrecen, POB.51. Hungary)
    10/09/2009, 14:30
    ATOMKI has a long range program, supported by the European Research Council, to study reactions relevant to p-process using low energy accelerators. In addition to the alpha-induced reactions, proton-induced cross section data can test the reliability of the model calculations in the proton rich region as well as provide experimental information directly relevant to the p-process. Recent...
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  3. 9. The (n, gamma) Cross Sections Of Heavy p-Process Nuclei
    Justyna Marganiec (GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany)
    10/09/2009, 14:50
    The neutron capture cross sections of proton-rich nuclei are important for the nucleosynthesis of the heavy elements in the p process. Aspects of (n,gamma) reactions in the p process refer to the competition with (gamma,n) reactions, which affects the photodisintegration flux towards lighter nuclei, and to the formation of the final p-process abundances during the freeze-out phase. However,...
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  4. 10. Detection, halflife and production of p-process nuclide 146Sm: progress report
    Michael Paul (Racah Institute of Physics, Hebrew University, Jerusalem, Israel)
    10/09/2009, 15:10
    The 146Sm nuclide (t1/2= 1.03x10^8 a) belongs to the small family of nuclides produced by the nucleosynthesis p-process . Its presence as live radionuclide in the Early-Solar System was established by the study of isotopic anomalies of its 142Nd alpha daughter in meteorites. Interestingly, a difference in 142Nd isotopic signatures has been also discovered between terrestrial and chondritic...
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  5. 12. New capabilities for p-process measurements with re-accelerated rare isotope beams at ReA3
    Artemis Spyrou (National Superconducting Cyclotron Laboratory and Department of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824, USA)
    10/09/2009, 15:45
    Proton, neutron and alpha-particle capture reactions are the main contributors towards the understanding of the p-process nucleosynthesis. Although the reactions involved in this process are mainly photodisintegrations, measuring the inverse reactions can be even more helpful than the measurement of the gamma -induced reactions themselves. Recently there have been major experimental...
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  6. 3. (p,gamma) measurements for p-process nucleosynthesis with the ESR at GSI
    Michael Heil (GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany)
    10/09/2009, 16:15
    E062 Collaboration
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  7. 6. Opportunities of in-beam experiments for the astrophysical p process
    Jens Hasper (Institut fuer Kernphysik, Universitaet zu Koeln, 50937 Koeln, Germany)
    10/09/2009, 16:45
    The p-process is the most promising astrophysical scenario for the nucleosynthesis of about 35 proton-rich nuclei referred to as p nuclei. This process involves an extensive reaction network of about 2000 nuclei and more than 20000 reactions, especially photodisintegration reactions, under explosive physical conditions. The huge number of reaction rates are mainly adopted from...
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  8. 15. The rp-process: a short introduction
    Anuj Parikh (Physik Department E12 and Excellence Cluster Universe, Technische Universitaet Muenchen, D-85748 Garching)
    11/09/2009, 09:00
  9. 4. Experimental studies on rp-process nuclei at the NSCL
    Daniel Galaviz (Centro de F´ısica Nuclear da Univ. de Lisboa, 1649-003 Lisbon, Portugal)
    11/09/2009, 09:15
    Type I X-ray bursts are thermonuclear runaways that occur on the surface of neutron stars in binary systems with low-mass companions. These systems, in some cases, host the so-called rapid proton capture process (rp–process) [1,2]. Under high temperature (T ~2 GK) and density (rho> 1E5 g/cm3) conditions in the burning layer, the nuclear reaction network of the rp- process runs close to the...
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  10. 11. Study of 69Br Proton Emission and the rp-Process 68Se Waiting Point
    Andrew M. Rogers (NSCL and Department of Physics & Astronomy and Joint Institute of Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824, USA)
    11/09/2009, 09:40
    A complete understanding of the synthesis of the elements is one of the main outstanding questions in nuclear astrophysics. A number of nucleosynthesis processes are known and to a reasonable extent account for much of the observed solar abundances of nuclei. However, there are a number of elements that can only be produced via processes involving proton rich nuclei. The rapid...
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  11. 2. Mass measurements of exotic nuclides along the rp-process path at SHIPTRAP
    Emma Haettner (II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany and GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany)
    11/09/2009, 10:05
    The masses of proton-rich nuclides in the element range from Sr to Tc were measured with the Penning trap mass spectrometer SHIPTRAP [1] at GSI. These nuclei were produced in the fusion-evaporation reaction 36Ar + 54Fe at energies of 5.0 and 5.9 MeV/u and separated by the velocity filter SHIP [2]. Their masses were measured with relative accuracies ranging from 5·10-8 to 2·10-7. The masses...
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  12. 17. Photon-induced experiments for the p process
    Jens Hasper (Institut fuer Kernphysik, Universitaet zu Koeln, 50937 Koeln, Germany)
    11/09/2009, 10:45
  13. 7. A global study of the electric dipole strength in heavy nuclei
    Arnd R. Junghans (Forschungszentrum Dresden-Rossendorf, Postfach 510119, 01314 Dresden, Germany)
    11/09/2009, 11:15
    The gamma ray strength function of heavy nuclei is an important quantity to determine their reaction rates in in high temperature environments envisioned in explosive nucleosynthesis. Especially p-process nuclides are formed through sequences of photodisintegrations from sand r-process seeds. In these reactions the gamma ray strength function around the neutron separation energy on the low...
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  14. 16. The nu~p-process in core-collapse supernovae
    Shinya Wanajo (Excellence Cluster Universe, TU Muenchen)
    11/09/2009, 11:45
    Recent hydrodynamic simulations of core-collapse supernovae with accurate neutrino transport suggest that the bulk of the neutrino-heated ejecta is proton rich, in which the production of some interesting proton-rich nuclei is expected. However, there are a number of beta-waiting points that prevent the production of heavy proton-rich nuclei beyond iron in explosive events such...
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  15. 13. p-process simulations with an updated reaction library
    Iris Dillmann (Physik Department E12 and Excellence Cluster Universe, Technische Universitaet Muenchen, D-85748 Garching)
    11/09/2009, 12:15
    We have performed p-process simulations with an updated version of the Basel reaction library [1,2] including all (n,gamma) cross sections from the Karlsruhe Astrophysical Database in Stars project (v0.2) [3]. The simulations were carried out with a parametrized supernova type II shock front model (‘gamma -process’) of a 25 solar mass star and compared to recently published results of Rapp et...
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  16. 14. Status of the p-process database in KADoNiS
    Iris Dillmann (Physik Department E12 and Excellence Cluster Universe, Technische Universitaet Muenchen, D-85748 Garching), Tamas Szucs (Institute of Nuclear Research (ATOMKI), H-4001 Debrecen, POB. 51, Hungary)
    11/09/2009, 12:30
    A short overview is given about ongoing activities concerning the p-process library in the Karlsruhe Astrophysical Database of Nucleosynthesis in Stars (www.kadonis.org). For this project a collaboration with the ATOMKI in Debrecen has been established.
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