Arbeitskreis K.-L. Kratz NUKLEARE ASTROPHYSIK

Lehrveranstaltungen im SS2007 Seminar über aktuelle Themen aus Kosmochemie und Astrophysik P. Hoppe, K.-L. Kratz, U. Ott Seminarraum Bau T, MPI für Chemie, Becherweg 25, Mo 17-19, wöchentlich Einführung in die Kosmochemie (VI) U. Ott Seminarraum Inst. f. Kernchemie, Di 13:15, wöchentlich

	Das Alter des Alls Mainzer Forscher lieferten entscheidende Daten Gabi Henkel im Feuilleton der Allgemeinen Zeitung Ausgabe Samstag 3. März 2001
	Neuer Massstab für das Alter des Kosmos Datierung anhand eines langlebigen Uranisotops Georg Wolschin in NZZ Forschung und Technik Ausgabe Mittwoch 21. Februar 2001

NAP2001: Symposium on Nuclear Astrophysics GSI Darmstadt (Germany), May 3 - 4, 2001

Identification of the N=82 r-process waiting-point isotope 129Ag

During the night of October 20 to 21 1997, at CERN-ISOLDE using a chemically selective laser ion source, the long searched for N=82 r-process waiting-point isotope ¹²⁹Ag₈₂ has been identified. Its proton g_9/2 ground state beta-decay half-life has been determined via the delayed neutron emission mode to (46 ⁺⁵_-9) ms.

CERN COURIER Vol. 38 No. 1 (1998) 6 CERN-ISOLDE: astrophysics helps piece together supernova puzzle

Das erschöpfte Fussvolk nach dem Ende des Experimentes in der "Küche" der ISOLDE

und die Teamchefs beim ISOLDE-Dinner.

Recent publications

• K.-L. Kratz, J.-P. Bitouzet, F.-K. Thielemann, P. Möller and B. Pfeiffer
  Isotopic r-Process Abundances and Nuclear Structure far from Stability: Implications for the r-Process Mechanism
  Ap. J. 403, 216(1993)
• H. Schatz, A. Aprahamian, J. Görres, M. Wiescher, T. Rauscher, J.F. Rembges, F.-K. Thielemann, B. Pfeiffer, P. Möller, K.-L. Kratz, H. Herndl, B.A. Brown, and H. Rebel
  rp-Process nucleosynthesis at extreme temperature and density conditions
  Phys. Rep. 294 (1998) 167 - 263
  
• K.-L. Kratz, B. Pfeiffer, M. Hannawald, F.-K. Thielemann, J. Görres, H. Schatz, and M. Wiescher
  Nuclear physics far from stability and explosive nucleosynthesis processes [PDF-Datei]
  Proc. of the EPS Conference on Structure of nuclei under extreme conditions, March 31 - April 4, 1998 - Padova, Italy; Il Nuovo Cimento 111A (1998) 1043 - 1054
• J.J. Cowan, B. Pfeiffer, K.-L. Kratz, F.-K. Thielemann, C. Sneden, S. Burles, D. Tytler, and T.C. Beers
  R-Process Abundances and Chronometers in Metal-Poor Stars
  Ap.J. 521 (1999) 194-205
• K.-L. Kratz, P. Möller, B. Pfeiffer, and F.-K. Thielemann
  Astrophysical r-process: From B²FH to Present
  Proc. Symposium Origin of Elements in the Solar System: Implications of Post-1957 Observations at 218^th Meeting of the American Chemical Society, New Orleans; August 1999; Kluwer/Plenum Academic Press, in print
• K.-L. Kratz, P. Möller, B. Pfeiffer, and W.B. Walters
  New Information on r-Process Nuclei
  Proc. Tenth Int. Symp. on Capture Gamma-Ray Spectroscopy and Related Topics; S. Wender, ed.; Santa Fe, New Mexico, USA, 30 Aug. - 3. Sep. 1999; AIP Conf. Proc. 529 (2000) 295-306
  
• K.-L. Kratz, B. Pfeiffer, F.-K. Thielemann and W.B. Walters
  Nuclear Structure Studies at ISOLDE and their Impact on the Astrophysical r-Process
  Hyperfine Interactions, The ISOLDE Laboratory Portrait, D. Forkel-Wirth, G. Bollen, eds.; in print
• K.-L. Kratz, J. Görres, B. Pfeiffer and M. Wiescher
  Nuclear Structure Near the Particle Drip-Lines and Explosive Nucleosynthesis Processes
  J. Radioanal. Nucl. Chem. (Special Issues) 243 (2000) 133-140, Nuclear and Radioanalytical Chemistry in the New Millenium. Glenn Seaborg Memorial Issue
  

An introduction to nucleosynthesis from the Space Sciences Laboratory at U.C. Berkeley.

A plot of the nuclides contributing to the r-process and the resulting abundances is shown, superimposed on a representation of [beta]- lifetimes. The small black squares are the stable isotopes, the black line represents the limit of the known nuclides on the neutron-rich side, and the magenta line below and to the right is a typical r-process contour. The small magenta squares show the nuclides that are produced when the r-process line decays.
Courtesy of Guided Tour of the Nuclear Information Service at Los Alamos

Some related links: Introduction to solar system Stars and Galaxies Courses in Astronomy and Astrophysics: Foundation of Cosmological Thought by J.C. Evans Charles R. Cowley's Introduction to Astronomy 101/111: Part I, Part II, Part III The Electronic Universe Project's Astronomy HyperText Book Ned Wright's Cosmology Tutorial European Space Agency European Southern Observatory JINA - The Joint Institute for Nuclear Astrophysics NASA Homepage Space Telescope Science Institute Guided Tour of the Nuclear Information Service at Los Alamos Nuclear Properties for Astrophysics at LANL Isotopes Project at Berkeley

Ende 1999 wurde im Rahmen einer Artikelserie "Von Mainz ins All" im Perry Rhodan-Journal: Wissenschaft und Technik Nr. 20 (Beilage zum Heft Nr. 1994/45 der deutschen Sci-Fi-Serie Perry Rhodan) auch die Arbeiten der Nuklearen Astrophysik-Gruppe am Institut für Kernchemie einem breiten Publikum bekannt gemacht: "Forschung in Mainz - an den Grenzen von Raum und Zeit" von unserem Kernphysik-Kollegen Patrick Achenbach.

Anmerkung: Die Lebensdauer des sehr kurzlebigen Isotops 129Ag wurde am ISOLDE-Separator am CERN gemessen und nicht am TRIGA in Mainz, s.o.

klkratz@uni-mainz.de

Stand: Januar 2001