The Role of Hot Hole Migration in Electronic Sputtering of Alkali Halides

Postawa, Zbigniew; Kołodziej, Jacek; Czuba, P.; Piątkowski, P.; Poradzisz, A.; Szymoński, Marek; Fine, Joseph

doi:10.1007/978-3-642-78080-6_48

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…Although our data have comparatively large error bars, the total number of desorbed atoms seemed to increase with electron energy in this region. In contrast, a previous study reported that the relative halogen yields slightly decrease with the increasing energy of incident electrons from 1 to 2 keV 17) . However, the cited results appeared to be scattered, the angle of incidence of electrons was 45°, halogens were measured at 90°with respect to the surface, and the temperature of the surface was not shown except an information that it was above 90°C 17) .…”

Section: (A)contrasting

confidence: 62%

“…In contrast, a previous study reported that the relative halogen yields slightly decrease with the increasing energy of incident electrons from 1 to 2 keV 17) . However, the cited results appeared to be scattered, the angle of incidence of electrons was 45°, halogens were measured at 90°with respect to the surface, and the temperature of the surface was not shown except an information that it was above 90°C 17) . The present comparison of the total number of desorbed atoms does not support the decreasing dependence; however, further research is needed for measuring the electron energy dependence of the total desorbed atoms (thermal component).…”

Section: (A)contrasting

confidence: 62%

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Detection System for KeV Proton Beam Scattered from an ESD-surface with Monolayer Pits of Alkali Halide Crystal

2017

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To observe specular oscillations in ion-surface scattering originating from layer-by-layer desorption of an electron stimulated desorbed (ESD) surface, a 15 keV proton beam was impinged on the surface with an angle of incidence less than 1°. We prepared an experimental system to examine the scattering yields of re‰ecting protons by conveniently employing a ‰uorescent screen to view scattering yields (scattering patterns) and a commercial digital camera for yield measurements. Because the present energy of the proton beam was too low to illuminate the screen, a micro-channel plate was inserted in front of the screen. Measurements with electron irradiation show obvious damping specular oscillations; the widths of angular distributions of scattered protons simultaneously oscillated with increasing electron ‰uence. From the measured periods of the oscillations, the ESD rates of thermal desorption from KBr(001) at 1.5 keV electrons irradiation were obtained for sample temperatures.

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Section: (A)contrasting

confidence: 62%

Section: (A)contrasting

confidence: 62%

Detection System for KeV Proton Beam Scattered from an ESD-surface with Monolayer Pits of Alkali Halide Crystal

2017

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“…Thus the normalized intensity tended to increase with increasing beam intensity. Although the energy of irradiated electrons was 5 keV and the surface temperature was 420 K, the cited data were measured at an energy of 1 keV and a surface temperature of 400 K 12) . Thus the yield of the thermal desorption is nearly twice as large as that assumed in the simulation, where the electron energy diŠerence causes a change of 1.6 times and that of temperature causes a change of 1.1 times.…”

Section: Comparison With Experimental Resultsmentioning

confidence: 99%

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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Oscillating behavior of proton scattering amplitude on an electron-stimulated-desorbed surface of KBr by keV electrons

Fukazawa

Tasaki

Susuki

2020

Nuclear Instruments and Methods in Physics Research Section B:

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The Role of Hot Hole Migration in Electronic Sputtering of Alkali Halides

Cited by 3 publications

References 11 publications

Detection System for KeV Proton Beam Scattered from an ESD-surface with Monolayer Pits of Alkali Halide Crystal

Detection System for KeV Proton Beam Scattered from an ESD-surface with Monolayer Pits of Alkali Halide Crystal

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

Oscillating behavior of proton scattering amplitude on an electron-stimulated-desorbed surface of KBr by keV electrons

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