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Physics

Electron physics

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Displaying 151 - 175 of 181

A New Form for the Third-Order Asymptotic Aberration Coefficients of Electrostatic Lenses: Application to the Two-Tube Electrostatic Lens

January 1, 1975

Author(s)

D DiChio, S Natali, C Kuyatt

The third-order asymptotic aberration coefficients of round electrostatic lenses are reformulated in terms of the coordinates formed by the projections of the asymptotic incident and final rays onto the reference plane of the lens. In this formulation, all

Electron Excitation of Xenon Near Threshold

December 16, 1974

Author(s)

Nils Swanson, Robert Celotta, C Kuyatt

Dipole Oscillator Strength Distributions Derived for Several Hydrocarbons from Electron Energy Loss Spectra

December 14, 1974

Author(s)

R Huebner, Robert Celotta, S Mielczarek, C Kuyatt

Electron Scattering from NO and N 2 O Below 10 eV

December 1, 1974

Author(s)

A Zecca, I Lazzizzera, Morris Krauss, C Kuyatt

Total electron scattering cross sections for NO and N 2O in the energy range 0-10 eV were obtained from exponential attenuation in a straight-line collision chamber without a confining magnetic field. Good agreement is obtained with previous measurements

Third-Order Asymptotic Aberration Coefficients of Electron Lenses. III. Formulas and results for the two-tube electrostatic lens

October 1, 1974

Author(s)

C Kuyatt, D DiChio, S Natali

The third-order asymptotic aberration coefficients of round electrostatic electron lenses are formulated, following Hawkes, in a form independent of object and aperture positions. Six quantities are sufficient to specify completely the third-order

Apparent Oscillator Strength Distributions Derived from Electron Energy-Loss Measurements: Methane and n-Hexane

July 24, 1974

Author(s)

R Huebner, C H. Fergurson, Robert Celotta, S Mielczarek

Electron Impact Energy Loss Spectra of the 1 2 B 2 - XA 1 Transition of NO 2

July 15, 1974

Author(s)

Morris Krauss, Robert Celotta, S Mielczarek, C Kuyatt

Attenuation Lengths of Low-Energy Electrons in Solids

July 1, 1974

Author(s)

Cedric J. Powell

A compilation is presented of measured attenuation lengths of low-energy electrons in solids in the energy range (40 to 2000 eV) normally employed in X-ray photoelectron and Auger-electron spectroscopy. The techniques used to obtain electron attenuation

Introduction to Electron and Ion Optics

July 1, 1974

Author(s)

P Dahl

Focal Properties of the Two-Tube Electrostatic Lens for Large and Near-Unity Voltage Ratios

April 1, 1974

Author(s)

D DiChio, S Natali, C Kuyatt

Accurate calculations of focal properties of the two-tube electrostatic lens are extended to cover a range of voltage ratios from 1.1 to 10000. The accuracy of the calculations is discussed in detail. For voltage ratios near 6400 the lens is found to be

Use of Matrices to Represent Electron Lenses. Matrices for the Two-Tube Electrostatic Lens

April 1, 1974

Author(s)

D DiChio, S Natali, C Kuyatt, A Galejs

The use of matrices to represent electron lenses is discussed. It is shown that it is more convenient and natural to represent a lens by a matrix and that the matrix elements show a more regular behavior than do the focal properties. Thus matrices are more

Determination of Electron Attenuation Lengths in Metals: Transmission Through Thin Adsorbed Films

March 1, 1974

Author(s)

M Sunjic, D Sokcevic, John William Gadzuk

Electron Energy Loss Spectrum of Ozone

February 1, 1974

Author(s)

Robert Celotta, S Mielczarek, C Kuyatt

Apparent Oscillator Strengths for Molecular Oxygen

January 1, 1974

Author(s)

R Huebner, Robert Celotta, S Mielczarek, C Kuyatt

Apparent Oscillator-Strength Distributions Derived from Electron Energy-Loss Measurement: Methane and n-Hexane

January 1, 1974

Author(s)

R Huebner, C H. Fergurson, Robert Celotta, S Mielczarek

Dipole Oscillator-Strength Distributions Derived for Several Hydrocarbons from Electron Energy-Loss Spectra

January 1, 1974

Author(s)

R Huebner, Robert Celotta, S Mielczarek, C Kuyatt

Electron Energy Loss Spectroscopy of Acetone Vapor

November 15, 1973

Author(s)

R Huebner, Robert Celotta, S Mielczarek, C Kuyatt

High resolution, inelastic electron scattering data can provide new spectroscopic information on the electronic structure of polyatomic molecules. Features in the acetone energy loss spectrum from 0 to 15 eV obtained for 100 eV incident electrons

Focal Properties of the Two-Tube Electrostatic Lens for large Voltage Ratios

November 1, 1973

Author(s)

C Kuyatt, D DiChio, S Natali

Representation of Focal Properties of the Equal-Diameter Two-Tube Electrostatic Lens for Computer Calculations

November 1, 1973

Author(s)

A Galejs, C Kuyatt

Previous calculations have given accurate first-order focal properties for the two-tube electrostatic lens at discrete voltage ratios. For computer optimization, calculations involving systems of two-tube lenses, one must be able to calculate the focal

Third-Order Aberration Coefficients of Electron Lenses II

November 1, 1973

Author(s)

C Kuyatt, D DiChio, S Natali

Resonant Structure in Near-Threshold Electron Excitation of Krypton

October 1, 1973

Author(s)

Nils Swanson, J Cooper, C Kuyatt

By using a monochromator-analyzer combination, electron-excitation functions of the lowest-lying electronic states of krypton have been obtained at a scattering angle of 45° in the near-threshold region (9-14 eV). All excitation functions display a complex

Semiautomated Data-Recording and Control System for an Electron Energy Analyzer

August 1, 1973

Author(s)

Cedric J. Powell

A description is given of a digital data-recording and control system that has been used with a high resolution low energy electron scattering apparatus for the measurement of characteristic electron energy-loss spectra and Auger-electron spectra of solids

Application of Electron Spectroscopy to Air Pollution Measurements

January 1, 1973

Author(s)

C Kuyatt, Robert Celotta, S Mielczarek

Electron Energy Analyzer Design

January 1, 1973

Author(s)

C Kuyatt

Electron Energy Loss Spectra: A Source of Oscillator Strength Distributions

January 1, 1973

Author(s)

R Huebner, Robert Celotta, S Mielczarek, C Kuyatt

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