Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 394, Issue -, Pages 73-80Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2016.12.034
Keywords
Molecular ions; Stopping power; Mean excitation energy; Polarization propagator
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The essential material constant that determines the bulk of the stopping power of high energy projectiles, the mean excitation energy, is calculated for a range of smaller molecular ions using the RPA method. It is demonstrated that the mean excitation energy of both molecules and atoms increase with ionic charge. However, while the mean excitation energies of atoms also increase with atomic number, the opposite is the case for mean excitation energies for molecules and molecular ions. The origin of these effects is explained by considering the spectral representation of the excited state contributing to the mean excitation energy. (C) 2017 Elsevier B.V. All rights reserved.
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