Elasticity, internal excitation, fragmentation, and charge transfer during grazing scattering of fast fullerenes from a KCl(001) surface

被引：10

作者：

Wethekam, S. ^{[1
]}

Merck, J. ^{[1
]}

Busch, M. ^{[1
]}

Winter, H. ^{[1
]}

机构：

[1] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 08期

关键词：

RESONANT COHERENT EXCITATION; FAST HYDROGEN-ATOMS; NEUTRAL C-60; TRANSFER DYNAMICS; ELECTRON-TRANSFER; LIF(001) SURFACE; CRYSTAL-SURFACES; IONS; CARBON; VELOCITY;

D O I：

10.1103/PhysRevB.83.085423

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

C(60)(+) and C(70)(+) fullerenes with keV energies are scattered under grazing polar angles of incidence from an atomically clean and flat KCl(001) surface. For this model system of molecule surface interactions, the elastic properties of the fullerenes in front of the surface are studied by polar angular distributions. From the analysis of fragment spectra, the internal excitations of scattered molecules are deduced and excitation mechanisms are identified. Charge fractions indicate a kinematically induced neutralization of the fullerenes. Via an analysis of negatively charged fragments, the transition from a "soft" scattering event with intact outgoing fullerenes to postcollision multifragmentation is analyzed. The data are compared to three-dimensional molecular dynamics simulations based on empirical bond-order potentials.

引用

页数：10

共 32 条

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