Search results for "Silicon monoxide"

showing 3 items of 3 documents

Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D

2017

Most massive stars end their lives in core-collapse supernova explosions and enrich the interstellar medium with explosively nucleosynthesized elements. Following core collapse, the explosion is subject to instabilities as the shock propagates outwards through the progenitor star. Observations of the composition and structure of the innermost regions of a core-collapse supernova provide a direct probe of the instabilities and nucleosynthetic products. SN 1987A in the Large Magellanic Cloud (LMC) is one of very few supernovae for which the inner ejecta can be spatially resolved but are not yet strongly affected by interaction with the surroundings. Our observations of SN 1987A with the Ataca…

010504 meteorology & atmospheric sciencesAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesSubmillimeter Arraychemistry.chemical_compound0103 physical sciencesAstrophysics::Solar and Stellar AstrophysicsLarge Magellanic CloudEjecta010303 astronomy & astrophysicsSolar and Stellar Astrophysics (astro-ph.SR)Astrophysics::Galaxy Astrophysics0105 earth and related environmental sciencesQBPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Astronomy and AstrophysicsSilicon monoxideAstrophysics - Astrophysics of GalaxiesInterstellar mediumCore (optical fiber)StarsSupernovachemistryAstrophysics - Solar and Stellar Astrophysics13. Climate actionSpace and Planetary ScienceAstrophysics of Galaxies (astro-ph.GA)Astrophysics - High Energy Astrophysical PhenomenaThe Astrophysical Journal
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An Analysis of the Broadening Induced by Beam Damage in Transmission Electron Diffraction Spots from an Oriented Aliphatic Monolayer

1991

We have analysed the progressive changes in diffraction spot shape during prolonged transmission electron diffraction observation of a soap monolayer supported on a thin polymer film. The material used to form the monolayer was cadmium eicosanoate (arachidate). The observed changes cannot be explained at all in terms of the chemical crosslinking which is known to occur as a result of beam damage, nor completely in terms of the strain fields caused by unbound dislocation defects of the crystalline lattice. The most plausible explanation involves the formation of linear dislocation aggregates which resemble grain boundaries but yet which are not linked into a continuous network. The evolution…

Diffractionchemistry.chemical_compoundCrystallographyElectron diffractionChemistryMonolayerGrain boundaryCrystal structureDislocationSilicon monoxideMolecular physicsBeam (structure)
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Visible polarized light transmission spectroscopy of the electro-optic switching behaviour of surface stabilized ferroelectric liquid crystal cells

1991

Abstract We present in this paper an experimental and theoretical modelling study of the switching characteristics and electro-optic behaviour of chevron surface stabilized ferroelectric liquid crystal cells with planar (low pre-tilt) and non-planar (high pre-tilt) surface conditions. The visible polarized light transmission spectra were taken of the cells with glass plates coated with films of either rubbed polymer or obliquely evaporated silicon monoxide (SiO) at various applied voltages and in various stages of switching and compared with the theoretical values calculated numerically based on our director-polarization structure model for the aforementioned cells. The results provide evid…

chemistry.chemical_classificationMaterials sciencebusiness.industryGeneral ChemistryPolymerCondensed Matter PhysicsFerroelectricitySilicon monoxideSpectral linechemistry.chemical_compoundOpticsPlanarchemistryLiquid crystalOptoelectronicsChevron (geology)General Materials SciencebusinessVoltageLiquid Crystals
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