MeV-ion axial surface-channeling from an electron irradiated KCl(001) surface

Fukazawa, Yuuko; Matsumoto, Yuugo; Mitsuhara, Kei; Susuki, Yasufumi

doi:10.1016/j.apsusc.2009.05.151

Cited by 6 publications

(6 citation statements)

References 14 publications

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“…5 with our previous results, the surfaces in the HV condition are relatively contaminated 12,15) . We could not observe distinct overlapped pyramidal steps on these surfaces.…”

Section: Resultssupporting

confidence: 68%

“…Our experimental measurements were carried out with an ion surface-channeling technique with aid of observation by atomic force microscopes (AFM). The surfaces have many overlapped steps of monoatomic height created by electron-stimulateddesorption (ESD) 12) . We expect that the steps canˆx the Au clusters on the surface as the Au particles grow.…”

Section: Introductionmentioning

confidence: 99%

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Growth of Au Particles Evaporated on KBr and KCl Substrates Wearing Increased Densities of Surface Steps

et al. 2014

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Growth forms of Au particles prepared by vacuum evaporation methods on KBr(001) and KCl(001) substrates with two types of surface steps prepared by thermal sublimation and by electron stimulated desorption are studied by using a carbon backing method with a transmission electron microscope. Spiral steps of monoatomic height have been prepared on the substrate surfaces by heat sublimation. Epitaxial Au particles with pyramidal shapes and other multiply twined particles are grown by the vacuum evaporation on the substrates at temperatures of 50-450°C. The size distributions of the particles on the substrates are reported and the typical size is measured to be smaller than 20×20 nm 2 . The ratio of populations of the multiply twined particles along the KBr steps is increased compared with that on the ‰at area. However, this increase in the ratio is not observed for particles grown on KCl. Additionally, step assemblies are prepared by electron stimulated desorption (ESD). The dependence of the size distributions of the Au particles grown on the substrates on electron ‰uence is measured for the ESD surfaces. With increasing electron ‰uence, the peak particle distribution size becomes smaller and particles smaller than 1 nm are observed.

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“…5 with our previous results, the surfaces in the HV condition are relatively contaminated 12,15) . We could not observe distinct overlapped pyramidal steps on these surfaces.…”

Section: Resultssupporting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Growth of Au Particles Evaporated on KBr and KCl Substrates Wearing Increased Densities of Surface Steps

et al. 2014

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“…3(d) and (e), where 0.55 MeV proton beams from an accelerator at Nara Women's University were incident on the KBr(001) surface with a 9 mrad incident angle. A detailed description of the experimental setup was previously reported 6,7,11) . On the ‰at surface, the emission distribution peaks at a scattering angle of twice the angle of incidence.…”

Section: Comparison With Experimental Resultsmentioning

confidence: 99%

“…Details of the trajectory calculation for fast protons on the alkali halide surfaces, where many surface steps are densely piled up, has been shown in previous papers 6,7) . In the present work, the introduced morphologies of the stepped surfaces are revised from those used previously, where monolayer pits were not assumed but semi-inˆnite terraces with monolayer steps were piled up along the proton-trajectories according to the given step 33 429 -( )-Vol.…”

Section: Trajectory Calculation Of Ionsmentioning

confidence: 99%

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Simulation of Intensity Oscillation of Planar Surface-channeling Protons Scattered on KBr Surface Irradiated by Electrons

et al. 2013

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Trajectories of fast (0.55 MeV) protons impinging under planar surface channeling conditions with an angle of incidence of several mrad are calculated on KBr(001) surfaces decorated by electron stimulated desorption (ESD). Two-dimensional angular distributions of protons scattered on the surface are obtained. In order to calculate trajectories, a computational technique is needed to form a set of morphologies of the surfaces according to the electron ‰uence. In our method, an assumption is made that the topmost atoms on the low coordinate sites are easily emitted by the ESD processes 5) . By choosing parameters introduced in the method, the oscillatory behavior of the desorption yields demonstrated by other groups is reproduced 2) . The resulting peak intensity of the re‰ected protons from the trajectory on the ensemble of surfaces with varying electron ‰uence oscillates as the electron ‰uence increases. Corresponding angular distributions of re‰ected protons have been measured on the electron irradiated KBr(001) surfaces, and a similar oscillation can be seen on the scattered yields with weak amplitudes.

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Intensity distributions of reflected surface channeling protons scattered on surfaces of electron-bombarded alkali halide crystals

Fukazawa

Kihara

Iwamoto

et al. 2013

Nuclear Instruments and Methods in Physics Research Section B:

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MeV-ion axial surface-channeling from an electron irradiated KCl(001) surface

Cited by 6 publications

References 14 publications

Growth of Au Particles Evaporated on KBr and KCl Substrates Wearing Increased Densities of Surface Steps

Growth of Au Particles Evaporated on KBr and KCl Substrates Wearing Increased Densities of Surface Steps

Simulation of Intensity Oscillation of Planar Surface-channeling Protons Scattered on KBr Surface Irradiated by Electrons

Intensity distributions of reflected surface channeling protons scattered on surfaces of electron-bombarded alkali halide crystals

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