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HK: Fachverband Hadronen und Kerne
HK 49: Nuclear Structure and Dynamics II
HK 49.5: Vortrag
Mittwoch, 18. März 2009, 15:15–15:30, H-ZO 50
Annihilation cross-sections of verylow energy antiprotons on nuclei — Maurizio Corradini1,2, Masaki Hori3,4,5, Marco Leali1,2, Evandro Lodi Rizzini1,2, Valerio Mascagna1,2, Aldo Mozzanica1,2, Michela Prest6,7, Erik Vallazza6,7, •Luca Venturelli1,2, and Nicola Zurlo1,2 — 1Dipartimento di Chimica e Fisica per l’Ingegneria e per i Materiali, Università di Brescia, I-25133 Brescia, Italy — 2Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Brescia, I-25133 Brescia, Italy — 3Max-Planck-Institut fur Quantenoptik, Hans-Kopfermann-Strasse 1, D-85748 Garching, Germany — 4Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan — 5CERN, CH-1211 Geneva 23, Switzerland — 6Dipartimento di Scienze Fisiche e Matematiche, Università di Como, I-22100 Como,Italy — 7Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste, Italy
The nuclear physics program of the ASACUSA Experiment at CERN concerns measuraments of antiproton-nuclei cross sections at low energies from MeV down to keV region. The importance of the results lies in the possibility to contribute in the understanding of the dynamic of annihilation process and to shed ligth on the saturation effect seen by the OBELIX Collaboration at 1-2 MeV where the annihilation rates od antiprotons on light nuclei (H, D, He) appear to be independent from the sizes of the targets.
The measurements performed by ASACUSA in 2008 with 5 MeV antiprotons on solid targets are reported and the trend with the mass number discussed.