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Gas-solid difference in charge-changing cross sections for bare and H-like nickel ions at 200MeVu

H. Ogawa, H. Geissel, A. Fettouhi, S. Fritzsche, M. Portillo, C. Scheidenberger, V. P. Shevelko, A. Surzhykov, H. Weick, F. Becker, D. Boutin, B. Kindler, R. K. Knöbel, J. Kurcewicz, W. Kurcewicz, Yu. A. Litvinov, B. Lommel, G. Münzenberg, W. R. Plaß, N. Sakamoto, J. Stadlmann, H. Tsuchida, M. Winkler, and N. Yao
Phys. Rev. A 75, 020703(R) – Published 26 February 2007

Abstract

It is well known that the density of the target can have a crucial impact on charge-changing collisions of partially ionized heavy ions. However, the basic understanding of this experimental observation is hampered by the difficulty in knowing the charge-state evolution of projectiles inside solids. Therefore, the present experiments with 200MeVu bare and H-like nickel ions were performed to study charge-changing cross sections in different monatomic and compound gases and solids. The experimental results clearly demonstrate that the electron-loss cross sections in solids increase by about 40% compared to gases. The results support the Bohr-Lindhard model which predicts this gas-solid difference originating from enhanced ionization of excited ions. The experimental results are compared with recent theoretical estimates.

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  • Received 7 October 2005

DOI:https://doi.org/10.1103/PhysRevA.75.020703

©2007 American Physical Society

Authors & Affiliations

H. Ogawa1, H. Geissel2,3, A. Fettouhi2,3, S. Fritzsche4, M. Portillo5, C. Scheidenberger2, V. P. Shevelko6, A. Surzhykov7, H. Weick2, F. Becker2, D. Boutin2, B. Kindler2, R. K. Knöbel2,3, J. Kurcewicz8, W. Kurcewicz8, Yu. A. Litvinov2,3, B. Lommel2, G. Münzenberg2, W. R. Plaß3, N. Sakamoto1, J. Stadlmann2, H. Tsuchida1, M. Winkler2, and N. Yao2

  • 1Department of Physics, Nara Women’s University, Nara 630-8506, Japan
  • 2Gesellschaft für Schwerionenforschung GSI, Planckstraße 1, 64291 Darmstadt, Germany
  • 3II. Physikalisches Institut, Justus-Liebig Universität Gießen, Heinrich-Buff-Ring 14, D-35392 Gießen, Germany
  • 4Institut für Physik, University of Kassel, Heinrich-Plett-Strasse 40, D-34132 Kassel, Germany
  • 5National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
  • 6P.N. Lebedev Physical Institute, Leninski prospect 53, 119991 Moscow, Russia
  • 7Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
  • 8Institute of Experimental Physics, Warsaw University, PL-00681 Warsaw, Poland

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Issue

Vol. 75, Iss. 2 — February 2007

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