Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.nimb.2012.04.006
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dc.titleAxial ion channeling patterns from ultra-thin silicon membranes
dc.contributor.authorMotapothula, M.
dc.contributor.authorDang, Z.Y.
dc.contributor.authorVenkatesan, T.
dc.contributor.authorBreese, M.B.H.
dc.contributor.authorRana, M.A.
dc.contributor.authorOsman, A.
dc.date.accessioned2014-10-07T04:24:10Z
dc.date.available2014-10-07T04:24:10Z
dc.date.issued2012-07-15
dc.identifier.citationMotapothula, M., Dang, Z.Y., Venkatesan, T., Breese, M.B.H., Rana, M.A., Osman, A. (2012-07-15). Axial ion channeling patterns from ultra-thin silicon membranes. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms 283 : 29-34. ScholarBank@NUS Repository. https://doi.org/10.1016/j.nimb.2012.04.006
dc.identifier.issn0168583X
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/81998
dc.description.abstractWe present channeling patterns produced by MeV protons transmitted through 55 nm thick [0 0 1] silicon membranes showing the early evolution of the axially channeled beam angular distribution for small tilts away from the [0 0 1], [0 1 1] and [1 1 1] axes. Instead of a ring-like "doughnut" distribution previously observed at small tilts to major axes in thicker membranes, geometric shapes such as squares and hexagons are observed along different axes in ultra-thin membranes. The different shapes arise because of the highly non-equilibrium transverse momentum distribution of the channeled beam during its initial propagation in the crystal and the reduced multiple scattering which allows the fine angular structure to be resolved. We describe a simple geometric construction of the intersecting planar channels at an axis to gain insight into the origin of the geometric shapes observed in such patterns and how they evolve into the 'doughnut' distributions in thicker crystals. © 2012 Elsevier B.V. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.nimb.2012.04.006
dc.sourceScopus
dc.subjectFLUX simulation
dc.subjectMeV protons
dc.subjectSilicon
dc.subjectTransmission axial channeling
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.doi10.1016/j.nimb.2012.04.006
dc.description.sourcetitleNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
dc.description.volume283
dc.description.page29-34
dc.description.codenNIMBE
dc.identifier.isiut000305858800005
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