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2 edition of Time-of-flight scattering and recoil spectrometry (TOF-SARS) applied to molecular liquid surfaces found in the catalog.

Time-of-flight scattering and recoil spectrometry (TOF-SARS) applied to molecular liquid surfaces

Thomas J. Gannon

Time-of-flight scattering and recoil spectrometry (TOF-SARS) applied to molecular liquid surfaces

a new approach to surface composition and orientation

by Thomas J. Gannon

  • 346 Want to read
  • 18 Currently reading

Published .
Written in English

    Subjects:
  • Liquids -- Spectra.,
  • Time-of-flight mass spectrometry.

  • Edition Notes

    Statementby Thomas J. Gannon.
    The Physical Object
    Pagination193 leaves, bound :
    Number of Pages193
    ID Numbers
    Open LibraryOL15560261M

    Abstract. The surface termination of c-axis oriented YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} (YBCO) and the oxygen incorporation mechanism has been investigated using a unique combination of spectroscopic ellipsometry (SE) and time of flight ion scattering and recoil spectrometry (ToF-ISARS). scattering angle around 30° is chosen, and the neutron recoil energy is therefore E n ’ ≈ ⋅E n. In a backward scattering TOF spectrometer, the scattering angle is close to °, and the recoil energy is E n ’ ≈ ⋅E n. Figure 1 Geometry of a forward scattering TOF (left) and a backward scattering .

    A prototype backscattering neutron time-of-flight spectrometer Kandidatexamensarbete i fysik Recoil) spectrometer incoming neutrons knock protons out from a hydrogen-rich target and a simple theoretical formulation of the time-of-flight backscattering problem is considered (see figure 3). For exact prototype setups, see section and Time of flight The inadequacy of recoil methods for low-energy neutron measurements and even for detection of low-energy neu-trons was appreciated very early. John R. Dunning and his colleagues3 were among the first to use a time-of-flight method for studies of slow neu-trons (a few keV and below). In this method one determines transit time of.

      1. Phys Rev B Condens Matter. Aug 15;42(5) Analysis of the reconstructed Ir() surface from time-of-flight scattering and recoiling spectrometry. Rutherford Backscattering Spectrometry (RBS) 61 Figure 2: Kinematic factor K at a scattering angle θ = as a function of target mass M2 for incident protons, 4He, and 7Li. eq. 4 has two solutions, and the maximum possible scattering angle θmax is given by θmax = arcsin M2 M1 (5) The kinematic Factor K, as a function of target mass M2, is shown in Fig. 2 for incident protons, 4He, and 7Li.


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Time-of-flight scattering and recoil spectrometry (TOF-SARS) applied to molecular liquid surfaces by Thomas J. Gannon Download PDF EPUB FB2

This is largely due to the following recent advances: (i) impact collision ion scattering spectrometry 3 (ICISS) in which the scattering angle is close to °, thus simplifying the scattering geometry and allowing experimental determination of the shadow cone radii, (ii) the use of alkali primary ions 5 which have Time-of-flight scattering and recoil spectrometry book neutralization probabilities, leading to higher scattered ion fluxes, (iii) time-of-flight (TOF) Cited by: 1.

This book highlights the application of Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) for high-resolution surface analysis and characterization of materials. While providing a brief overview of the principles of SIMS, it also provides examples of how dual-beam ToF-SIMS is used to investigate a range of materials systems and : Paperback.

When the neutral plus ion flux is velocity selected by measuring the flight times from the sample to the detector, the technique is called time‐of‐flight scattering and recoiling spectrometry (TOF‐SARS).Cited by: The technique of time-of-flight scattering and recoiling spectrometry (TOF-SARS) with detection of both neutrals and ions is applied to structural analysis of oxygen adsorbed on a W() surface.

The technique of time-of-flight scattering and recoiling spectrometry (TOF-SARS) is used for quantitative structural characterization of the reconstructed (1 × 2) missing-row Pt{} clean surface. The results are presented as scans of scattered intensity versus incident angle at two scattering angles and are interpreted in terms of simple classical concepts (shadowing, blocking, focusing).Cited by: This structural phase is characterized by time-of-flight scattering and recoiling spectrometry (TOF-SARS).

The results reveal that the surface is reconstructed into (1 x 3) troughs in which part of the central second-layer rows remain. A A inward relaxation of the first layer atoms is observed. Recoil Time of Flight Spectrometry Physical Principles With conventional Elastic Recoil Detection (ERD) all elements lighter than the incident ion are detected and all other elements blocked by the stopper foil.

Time-of-flight spectroscopy (1) Detectors. Sample. Monochromator. Pulser. Source. Beam stop. Beam monitor. Neutrons from the source are pulsed and monochromated. Monochromatic bursts of neutrons strike the sample.

Some of the neutrons are scattered, and some of the scattered neutrons are counted in the detectors. I.1 - Neutron time-of-flight methods 3 I.2 - Multisphere systems 4 I.3 - Spectrometry of recoil nuclei 6 I.4 - A recoil-proton spectrometer based on a Monolithic Silicon Telescope 7 II.

Analytical model and feasibility study 10 II.1 - Spectrometer Design 11 II.2 - Particle trajectory and energy deposition SIMNRA is an analytical code for the simulation of ion beam analysis energy spectra obtained by Rutherford backscattering, non-Rutherford scattering, elastic recoil detection analysis, and nuclear.

While energy recoil detection is one of the newest and most promising ion beam analytic techniques, it is also the oldest in terms of when it was first described.

Before discussing recent developments in this field, perhaps it is worth reviewing the early days of this century when the first energy recoil detection experiments were reported. The technique of time-of-flight scattering and recoil spectrometry (TOF-SARS) has been applied to molecular liquid surfaces for the first time.

The apparatus borrows key elements from previous TOF-SARS experiments on solids and from molecular beam scattering (MBS) and features excellent surface specificity and the ability to detect all : Thomas J.

Gannon. 1. Phys Rev B Condens Matter. Nov 15;40(15) Time-of-flight scattering and recoiling spectrometry. The structure of oxygen on the W() surface. A versatile time-of-flight ion scattering and recoiling spectrometer system: Authors: Charatan We have enhanced our existing ion scattering apparatus to perform time-of-flight ion scattering and recoiling experiments.

located before each microchannel plate detector allows the separation of charged and neutral yields that scatter or. Time‐of‐Flight Spectrometry. Ruep E. Lechner. Guest at Helmholtz‐Zentrum Berlin, Berlin, Germany Search for more papers by this author.

Book Editor(s): Toyoko Imae. National Taiwan University of Science and Technology, Honors College, Graduate Institute of Engineering, Taipei, Taiwan TOF Spectrometers for Quasielastic and.

Even with some poor quality illustrations, the author and the publisher have produced a better-than-adequate book on time-of-flight mass spectrometry. The organization makes this a book that can be easily read cover-to-cover or one that is a good reference book. Anyone currently working in mass spectrometry or wanting to get a basic Reviews: 3.

The use of time-of-flight methods allows capture of these patterns in time windows as short as 10 ns. The sensitivity of these patterns to the details of surface structure provides the basis for a scattering and recoiling imaging spectrometry (SARIS).

Coaxial Impact-Collision Ion Scattering Spectroscopy and Time-of-Flight Elastic Recoil Detection Analysis for In Situ Monitoring of Surface Processes in Gas Phase Atmosphere To cite this article: Mitsuhiro Katayama et al Jpn.

Appl. Phys. 40 L View the article online for updates and enhancements. Related contentCited by: 5. Most surface\ud analysis must take place in vacuum, a major drawback for liquids.

The technique of\ud time-of-flight scattering and recoil spectrometry (TOF-SARS) has been applied to\ud molecular liquid surfaces for the first time. The time-of-flight spectrometer TOFOR [5], installed indelivers data at high rates (maximum of kHz) of high quality in signal-to-background (S/B) and energy resolution (FWHM/E ≈ %).

The response function of TOFOR is Gaussian-like but influenced by multiple scattering events on the low energy side (high time-of-flight, see Fig. 1a). A time-of-flight direct recoil and ion scattering spectrometer beam line is disclosed. The beam line includes an ion source which injects ions into pulse deflection regions and separated by a drift space.

A final optics stage includes an ion lens and deflection plate assembly.15 Low Energy Ion Scattering and Recoiling Spectroscopy Fig. S c h e m a t i cv i e wo f(a) the missing row reconstructed Au() surface and (b)i n t e n s i t y.Elastic recoil detection (ERD) is used for obtaining depth profiles of these light elements.

While in RBS, a silicon barrier detector is typically placed at the scattering angles around – degrees (figure (a)); in ERD, the detector is mounted below angles of .