Palladium island growth on Ni(111) Stochastic classical trajectory — ghost atom calculations

BaF2 thin films are being investigated as candidates for use in YBa2Cu3O7-x (YBCO) / BaF2 thin film multilayer systems, given the favorable dielectric properties of BaF2. In this study, the microstructural and chemical compatibility of BaF2 thin films with YBCO thin films is examined using transmission electron microscopy and microanalysis. The specimen was prepared by using laser ablation to first deposit an approximately 2500 Å thick (0 0 1) YBCO thin film onto a (0 0 1) MgO substrate. An approximately 7500 Å thick (0 0 1) BaF2 thin film was subsequendy thermally evaporated onto the YBCO film.Images from a VG HB501A UHV scanning transmission electron microscope (STEM) operating at 100 kV show that the thickness of the BaF2 film is rather uniform, with the BaF2/YBCO interface being quite flat. Relatively few intrinsic defects, such as hillocks and depressions, were evident in the BaF2 film. Moreover, the hillocks and depressions appear to be faceted along {111} planes, suggesting that the surface is smooth and well-ordered on an atomic scale and that an island growth mechanism is involved in the evolution of the BaF2 film.

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Convergence Properties of Quasiclassical Trajectory Calculations on Dynamics of Autoionization Event in He(23S)-D2 Penning Ionization

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19970154 ◽

1997 ◽

Vol 62 (2) ◽

pp. 154-171 ◽

Cited By ~ 1

Author(s):

Jan Vojtík ◽

Richard Kotal

Keyword(s):

Branching Ratios ◽

Classical Trajectory ◽

Vibrational States ◽

Penning Ionization ◽

Trajectory Calculations ◽

Quantum Mechanical Treatment ◽

Total Ionization ◽

Vibrational Levels ◽

Degree Of Convergence ◽

Product Branching

An analysis of the degree of convergence of theoretical pictures of the dynamics of the autoionization event He(23S)-D2(v" = 0) -> [He...D2+(v')] + e is presented for a number of batches of Monte Carlo calculations differing in the number of the trajectories run. The treatment of the dynamics consists in 2D classical trajectory calculations based on static characteristics which include a quantum mechanical treatment of the perturbed D2(v" = 0) and D2+(v') vibrational motion. The vibrational populations are dynamical averages over the local widths of the He(23S)-D2(v" = 0) state with respect to autoionization to D2+(...He) in its v'th vibrational level and the Penning electron energies are related to the local differences between the energies of the corresponding perturbed D2(v" = 0)(...He*) and D2+(v')(...He) vibrational states. Special attention is paid to the connection between the requirements on the degree of convergence of the classical trajectory picture of the event and the purpose of the calculations. Information is obtained regarding a scale of the trajectory calculations required for physically sensible applications of the model to an interpretation of different type of experiments on the system: total ionization cross section measurements, Penning ionization electron spectra, subsequent 3D classical trajectory calculations of branching ratios of the products of the postionization collision process, and interpretation of electron ion coincidence measurements of the product branching ratios for individual vibrational levels of the nascent Penning ion.

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Theoretical study of the dissociation reaction HFCO→HF+CO: New ab initio potential function and classical trajectory analysis

The Journal of Chemical Physics ◽

10.1063/1.474279 ◽

1997 ◽

Vol 107 (16) ◽

pp. 6114-6122 ◽

Cited By ~ 34

Author(s):

Takeshi Yamamoto ◽

Shigeki Kato

Keyword(s):

Ab Initio ◽

Potential Function ◽

Trajectory Analysis ◽

Theoretical Study ◽

Classical Trajectory ◽

Dissociation Reaction

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Classical Trajectory Analysis of the Reaction F+H2→HF+H

The Journal of Chemical Physics ◽

10.1063/1.1675156 ◽

1971 ◽

Vol 54 (5) ◽

pp. 2224-2236 ◽

Cited By ~ 112

Author(s):

Richard L. Jaffe ◽

James B. Anderson

Keyword(s):

Trajectory Analysis ◽

Classical Trajectory

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The vibrational predissociation ofcis‐methyl nitrite in theS1state: A comparison of exact quantum mechanical wave packet calculations with classical trajectory calculations and detailed experimental results

The Journal of Chemical Physics ◽

10.1063/1.465489 ◽

1993 ◽

Vol 99 (12) ◽

pp. 9553-9566 ◽

Cited By ~ 47

Author(s):

Agathe Untch ◽

Reinhard Schinke ◽

René Cotting ◽

J. Robert Huber

Keyword(s):

Wave Packet ◽

Classical Trajectory ◽

Experimental Results ◽

Quantum Mechanical ◽

Mechanical Wave ◽

Methyl Nitrite ◽

Vibrational Predissociation ◽

Trajectory Calculations ◽

Exact Quantum ◽

Quantum Mechanical Wave Packet

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Morphodynamic Controls for Growth and Evolution of a Rubble Coral Island

Remote Sensing ◽

10.3390/rs13081582 ◽

2021 ◽

Vol 13 (8) ◽

pp. 1582

Author(s):

Lara Talavera ◽

Ana Vila-Concejo ◽

Jody M. Webster ◽

Courtney Smith ◽

Stephanie Duce ◽

...

Keyword(s):

Climate Change ◽

Southern Oscillation ◽

Small Island ◽

Change Scenario ◽

Remotely Sensed Data ◽

Island Growth ◽

Wave Interactions ◽

Tree Island ◽

Coral Island ◽

Alongshore Sediment Transport

Rubble islands are dynamic sedimentary features present on reef platforms that evolve under a variety of morphodynamic processes and controlling mechanisms. They provide valuable inhabitable land for small island nations, critical habitat for numerous species, and are threatened by climate change. Aiming to investigate the controlling mechanisms dictating the evolution of One Tree Island (OTI), a rubble island in the Southern Great Barrier Reef, we combined different remotely-sensed data across varying timescales with wave data extracted from satellite altimetry and cyclone activity. Our findings show that (1) OTI had expanded by 7% between 1978 and 2019, (2) significant gross planform decadal adjustments were governed by the amount, intensity, proximity, and relative position of cyclones as well as El Niño Southern Oscillation (ENSO) phases, and (3) the mechanisms of island growth involve rubble spits delivering and redistributing rubble to the island through alongshore sediment transport and wave overtopping. Frequent short-term monitoring of the island and further research coupling variations in the different factors driving island change (i.e., sediment availability, reef-wave interactions, and extreme events) are needed to shed light on the future trajectory of OTI and other rubble islands under a climate change scenario.

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