Paper published in
Phys. Rev. Lett. 85, 2725 (2000)
Drastic Enhancement of Energy-Loss Straggling
of Relativistic Heavy Ions due to Charge-State Fluctuations
H. Weick,
H. Geissel, C. Scheidenberger,
F. Attallah,
D. Cortina, M. Hausmann,
G. Münzenberg,
T. Radon, H. Schatz,
K. Schmidt, J. Stadlmann,
K. Sümmerer, M. Winkler
Gesellschaft
für Schwerionenforschung, 64291 Darmstadt, Germany
II.Physikalisches
Institut, Universität Gießen, 35392 Gießen, Germany
Abstract:
Stopping power and energy-loss straggling of
197Au, 208Pb, and 209Bi
projectiles have been measured in
different solids (4 < Z2 < 82) in the energy range
(100 - 1000) MeV/u.
The experimental results clearly demonstrate the influence of the
different charge states of the ions. Due to charge-state
fluctuations the energy-loss straggling is up to seven times
larger than the pure collisional straggling. The selected energy
domain in combination with the heavy projectiles allows for the
first time an unambiguous interpretation of the long-standing problem
of charge-changing collisions in energy-loss straggling.
The full article is available from APS,
Physical Review Letters ,
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pdf .