Proton scattering from a tungsten single crystal

Tulinov, A.F.; Kulikauskas, V. S.; Malov, M. M.

doi:10.1016/0031-9163(65)90349-5

Cited by 54 publications

(14 citation statements)

References 4 publications

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“…It is now well established that the passage of energetic ions through single crystals may be strongly influenced by the periodic lattice, two of the most visually striking demonstrations of this being the star patterns obtained in proton transmission (Schiffer and Holland 1965) and the blocking patterns obtained in reflection (Nelson 1967a;Tulinov et al 1965). Such results are, in general, thought to be due to ions whose trajectories have in some way been controlled and limited by a series of correlated collisions with many lattice atoms.…”

Section: Introductionmentioning

confidence: 92%

“…It has been found that a beam of protons that has been reflected from a crystalline surface and detected by either a nuclear emulsion (Nelson 1967a) or fluorescent screen (Tulinov et al 1965) exhibits distinct minima along both crystallographic planes and directions. This phenomenon has generally been attributed to "blocking", whereby those protons which attempt to move along either close-packed planes or rows are rapidly deflected away by the correlated repulsion of atoms in that plane or row.…”

Section: Ivi Reflectionmentioning

confidence: 99%

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Computer studies of fast ion trajectories in crystals

Morgan¹,

Vliet²

1968

Can. J. Phys.

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A computer program has been developed which follows the trajectories of fast ions in crystals, based on the assumption of classical dynamics and binary collisions. Initial work has been directed at various aspects of proton channeling in copper in the energy range 5-509 keV. The critical angle and distance of closest approach in a perfect lattice have been evaluated for both rows and planes and compare well with the predictions of the continuum mods1 as developed by Lindhard (1965). We also discuss the overlap of close-packed rows and planes, and the modifications necessary to the basic theory when thermal vibrations are introduced. Experiments have been simulated directly by obtaining a statistical analysis of the velocity distribution of protons reflected from a (1W) face of copper and transmitted through a thin (-1800 A) crystal. In reflection, distinct miniina were obtained along directions corresponding to close-packed rows and planes, in good agreement with experimental "blocking patterns" (Nelson 1967~). Transmission patterns also revealed 2 !ack of large-angle scattering parallel to close-packed planes, analogous to the white arms observed experimentally with thinner crystals.

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Section: Introductionmentioning

confidence: 92%

Section: Ivi Reflectionmentioning

confidence: 99%

Computer studies of fast ion trajectories in crystals

Morgan¹,

Vliet²

1968

Can. J. Phys.

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“…The experimental results for sliding angles of 15" are displayed in the right-hand part of In the first works devoted to studies of the effect It can be seen that the double-peak relative height (or the relative height of the plateau to the right of the single peak if the double peak is not clearly defined) is strongly dependent on the target azimuthal rotation. This dependencet (for a 25" sliding angle 15 as a planar diagram. The double-peak relative height is a maximum at such orientations of target where the scattering plane is at a smail angle to the (1 10) plane perpendicular to the target surface.…”

Section: 03)mentioning

confidence: 95%

“…angle proton scattering was observed by Tulinov'' and by Tulinov, Kulikauskas and Malov, 16 and for d-p nuclear reactions by Gemmel and H~l l a n d . '~ Prior to presenting the experimental data about the regularities of medium-energy ion scattering by crystalline surfaces one needs to emphasize the following circumstance.…”

Section: Introductionmentioning

confidence: 92%

Medium-energy ion scattering by solid surfaces part II

Машкова

Molchanov

1974

Radiation Effects

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Being a scientist, perhaps, is only to discover tirelessly and repeatedly evident things." Chapter 4 . Regularities of ion scattering by surfaces of crystalline solids. Rimy Chauvin. CONTENTS Introduction. 4.1. Early works. 4.2. Scattering regularities in the primary ion incidence plane. Double-scattering effect 4.3. Spatial regularities in medium-energy ion scattering by crystals. 4.4. Theoretical treatment of ion scattering by crystalline solid surfaces 4.5. Comparison with experiment . , Conclusions Afterword .. 215. 217. 220. 241. 251. 251. 261. 268

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“…That paper also contains the first description of the dechanneling process, based on the diffusion theory and the notion of dechanneling length. In the following years, strong anisotropic effects were discovered for positive ions in crystals of silicon and germanium [24] and protons in tungsten [25]. In the seventies, investigations at high energies began [26] and, with them, the application of channeling to the steering of beams.…”

Section: Historical Overviewmentioning

confidence: 99%