Angle-resolved photoemission, using polarized synchrotron radiation, from the system Ni(001) +CO shows two chemisorption peaks which exhibit strong variations in amplitude depending on polar angle of emission and optical polarization. The behavior is agreement with a recent calculation angular photoemission oriented CO molecules, supporting model undissociated, "end-on" bonding molecular axis perpendicular to surface, thus demonstrates that angle-resolved may give adsorbate goemetries.

Synchrotron-radiation photoemission data are obtained from GaAs ($\overline{1}\overline{1}0$) and (110) faces for $s$ $p$ polarization which show an enhancement of valence-electron emission initial states at below the valence-band maximum when photon energy is scanned through threshold Ga-$3d$-core to intrinsic-surface-state excitations. The interpreted as a core surface exciton associated with Ga dangling bonds.

Objective To develop and validate a method for creating realistic, patient specific replicas of cerebral aneurysms by means fused deposition modeling. Methods The luminal boundaries 10 aneurysms, together with adjacent proximal distal sections the parent artery, were segmented based on DSA images, corresponding virtual three-dimensional (3D) surface reconstructions created. From these, polylactic acid MakerBot Flexible Filament each aneurysm created accuracy was assessed quantifying...

Received 21 February 1963DOI:https://doi.org/10.1103/PhysRevLett.10.227©1963 American Physical Society

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNature and activity of some vanadium catalystsB. I. Whittington J. R. AndersonCite this: Phys. Chem. 1993, 97, 5, 1032–1041Publication Date (Print):February 1, 1993Publication History Published online1 May 2002Published inissue 1 February 1993https://pubs.acs.org/doi/10.1021/j100107a010https://doi.org/10.1021/j100107a010research-articleACS PublicationsRequest reuse permissionsArticle Views352Altmetric-Citations86LEARN ABOUT THESE METRICSArticle...

An experimental study of the band structures GaP, GaAs, GaSb, InP, InAs, and InSb has been made with use polarization-dependent angle-resolved photoemission. We describe an analysis data which allowed us to do mapping (E vs ${\mathrm{k}}_{\ensuremath{\perp}}$) among some 30 bands both occupied unoccupied, distributed in range from 20 eV above 8 below valence-band maximum. The measurements were for 〈110〉 direction \ensuremath{\Gamma}--K--X along line \ensuremath{\Sigma} Brillouin zone....

Angle-resolved photoemission, using synchrotron radiation, from the chemisorption system W(001) + H shows a very large doublet of peaks at initial energies -1.3 and -0.6 eV for quarter-monolayer coverage which disappear higher coverage. The emission lobes are strongly peaked in $〈110〉$ azimuths attributed to essentially pure bulk W transitions. electrons emitted new directions through influence "extra" surface reciprocal lattice vectors associated with hydrogen...

A new method of taking uv photoemission data, employing synchrotron radiation, is described. The has significant advantages for investigating final-state properties interband transitions and many-body effects. Applying it to KCl, strong peaks in the conduction-band density states are located at 9.7 12.6 eV. data also suggest a probable interpretation an optical-reflectance peak ($h\ensuremath{\nu}\ensuremath{\simeq}13$ eV) whose origin been matter doubt.

The presence of personally identifiable information (PII) in natural language portions electronic health records (EHRs) constrains their broad reuse. Despite continuous improvements automated detection PII, residual identifiers require manual validation and correction. Here, we describe an de-identification system that employs ensemble architecture, incorporating attention-based deep-learning models rule-based methods, supported by heuristics for detecting PII EHR data. Detected are then...

We assessed the use of magnetic resonance imaging (MRI) to define placental hypoxic injury associated with fetal growth restriction. On embryonic day 18.5 (E18.5) we utilized dynamic contrast-enhanced (DCE)-MRI on a 4.7-tesla small animal scanner examine uptake and distribution gadolinium-based contrast agent. Quantitative DCE parameter analysis was performed for placenta kidneys three groups pregnant C57BL/6 mice: 1) mice that were exposed Fi(O(2)) = 12% between E15.5 E18.5, 2) in normoxia...

Listening to familiar music has recently been reported be beneficial during recovery from stroke. A better understanding of changes in functional connectivity and information flow is warranted further optimize target this approach through therapy. Twelve healthy volunteers listened seven different auditory samples an fMRI scanning session: a musical piece chosen by the volunteer that evokes strong emotional response (referred as: "self-selected emotional"), two unfamiliar pieces (Invention...

Angle-resolved high-resolution electron-energy-loss spectroscopy has been used to study electronic excitations on both the clean and contaminated Si(100)(2\ifmmode\times\else\texttimes\fi{}1) surfaces. Absorption edges surface were observed near 0.4 1.1 eV corresponding transitions from bulk valence band conduction band, respectively. The bulk-to-surface absorption edge was found move as a function of primary energy angle incidence. resulting dispersion relationship can be explained without...

Ultraviolet photoemission spectroscopy (UPS) has been developed into an important tool in the study of solid surfaces and adsorbed over‐layers. Until recently, several parameters process have been, at best, only imperfectly under control experimenter. These are (1) photon energy, (2) optical polarization, (3) momentum emitted electrons. Such limitations concealed much information implicit flux photoemitted Angle‐resolved UPS, combined with continuum polarization properties synchrotron...

A combined x-ray photoemission and diamagnetic-susceptibility study of ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{\mathrm{x}}$ with x\ensuremath{\simeq}6 7 has been performed, emphasis on the oxygen defect effect heating in vacuum. By comparing spectra taken at these two contents, core levels observed O 1s Ba 4d spectral range are identified. Peak-intensity analysis indicates (1) that released during situ is derived from or near Cu-O-Cu-O chains...

We report new results for the chemisorption system Ni $(001)c(2\ifmmode\times\else\texttimes\fi{}2)\mathrm{CO}$ using angle-resolved polarization-dependent photoemission with synchrotron radiation ($10\ensuremath{\le}h\ensuremath{\nu}\ensuremath{\le}40$ eV). Adsorbate-induced structure $\ensuremath{\pi}$- like symmetry is observed in normal emission at ${E}_{i}\ensuremath{\simeq}\ensuremath{-}2.2$ eV, and (100) mirror plane off ${E}_{i}\ensuremath{\simeq}\ensuremath{-}1.3$ eV. Using...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of Oxygen with Evaporated Films LeadJ. R. Anderson and V. B. TareCite this: J. Phys. Chem. 1964, 68, 6, 1482–1489Publication Date (Print):June 1, 1964Publication History Published online1 May 2002Published inissue 1 June 1964https://pubs.acs.org/doi/10.1021/j100788a036https://doi.org/10.1021/j100788a036research-articleACS PublicationsRequest reuse permissionsArticle Views83Altmetric-Citations31LEARN ABOUT THESE METRICSArticle Views are the...

We describe a detailed study of the different reconstructions obtained by depositing Al or In overlayers on Si(111)2×1 and Si(111)7×7 substrates, thermal annealing these overlayers. correlate information low-energy electron diffraction (LEED) with high-resolution energy loss spectra (HREELS).