Gas-solid difference in charge-changing cross sections for bare and H-like nickel ions at 200 MeV/u
- Department of Physics, Nara Women's University, Nara 630-8506 (Japan)
- Gesellschaft fuer Schwerionenforschung GSI, Planckstrasse 1, 64291 Darmstadt (Germany)
- Institut fuer Physik, University of Kassel, Heinrich-Plett-Strasse 40, D-34132 Kassel (Germany)
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
- P.N. Lebedev Physical Institute, Leninski prospect 53, 119991 Moscow (Russian Federation)
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 200 MeV/u 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.
- OSTI ID:
- 20982053
- Journal Information:
- Physical Review. A, Vol. 75, Issue 2; Other Information: DOI: 10.1103/PhysRevA.75.020703; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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