Reduction in the energy loss of 0.5-MeV-per-atom carbon-cluster ions in thin carbon foils

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.044901· OSTI ID:21454831

Tomita, S; Murakami, M; Kudo, H ^[1]; Sakamoto, N ^[2]; Ishii, S; Sasa, K ^[3]; Kaneko, T ^[4]

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1. Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8573 (Japan)
2. Department of Physics, Nara Women's University, Nara 630-8506 (Japan)
3. Tandem Accelerator Complex, University of Tsukuba, Tsukuba, Ibaraki 305-8577 (Japan)
4. Department of Applied Physics, Okayama University of Science, 1-1 Ridai-cho, Okayama 700-0005 (Japan)

We have precisely measured the energy loss of carbon cluster ions C{sub n}{sup +} with a kinetic energy of 0.5 MeV/atom. The measured energies, lost in a thin carbon foil by cluster ions, are lower than that of an atomic ion with the equivalent speed [{Delta}E(C{sub n}{sup +})/n<{Delta}E(C{sup +})], whereas most existing experimental results show the opposite trend with kinetic energies higher than 2.0 MeV/atom. The experimental values are compared with the calculated ones, which take into account the effect of the Coulomb force, polarization force, and reduction in the cluster average charge on the response of a solid. The agreement between the measured and calculated energy losses indicates that the reduction in the energy loss is due to a structural correlation in electron excitation during the passage of the cluster.

• OSTI ID: 21454831
• Journal Information: Physical Review. A, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevA.82.044901; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMIC IONS
ATOMS
CARBON
CARBON IONS
CORRELATIONS
ELECTRONS
ENERGY LOSSES
EXCITATION
FOILS
ION PAIRS
ION-ATOM COLLISIONS
KINETIC ENERGY
MEV RANGE
POLARIZATION
SOLIDS
ATOM COLLISIONS
CHARGED PARTICLES
COLLISIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
FERMIONS
ION COLLISIONS
IONS
LEPTONS
LOSSES
NONMETALS