The stability of cylindrical reverse domains

Bishop, J.E.L.

doi:10.1088/0022-3727/7/1/104

Cited by 11 publications

(15 citation statements)

References 2 publications

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“…37,38 The P curv contributions are usually smaller than the P NR contribution and are not computed here. A comparison and detailed analysis of these two schemes has been discussed in the literature repeatedly.…”

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confidence: 99%

On the particular importance of vibrational contributions to the static electrical properties of model linear molecules under spatial confinement

Zaleśny

Góra

Luis

et al. 2015

Phys. Chem. Chem. Phys.

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The influence of the spatial confinement on the electronic and vibrational contributions to longitudinal electric-dipole properties of model linear molecules including HCN, HCCH and CO2 is discussed. The effect of confinement is represented by two-dimensional harmonic oscillator potential of cylindrical symmetry, which mimics the key features of various types of trapping environments like, for instance, nanotubes or quantum well wires. Our results indicate that in general both (electronic and vibrational) contributions to (hyper)polarizabilities diminish upon spatial confinement. However, since the electronic term is particularly affected, the relative importance of vibrational contributions is larger for confined species. This effect increases also with the degree of anharmonicity of vibrational motion.

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mentioning

confidence: 99%

On the particular importance of vibrational contributions to the static electrical properties of model linear molecules under spatial confinement

Zaleśny

Góra

Luis

et al. 2015

Phys. Chem. Chem. Phys.

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“…Taking φ(ρz) constant according to Bishop's model [4], with respect to the geometry in which the electron beam and the detector are aligned (α = 0 and θ = π/2), the absorption term becomes…”

Section: Structure Of Programmentioning

confidence: 99%

Applications of simulated x-ray spectra to x-ray imaging

Elhila

Mouze

1996

J. Phys. D: Appl. Phys.

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When using microfocus x-ray sources for x-ray imaging (x-ray projection microscopy or microradiography), the measured intensities are influenced by the non-monochromaticity of the incident x-ray beam. This affects the transmitted signal in the image pixels and consequently brings about errors in quantitative measurements by x-ray absorption analysis or in tomographic reconstruction. A model developed to predict the spectral distribution of x-rays generated by electron bombardment on a metallic target has been modified to be adapted to transmission targets. It is used here, in combination with a semi-empirical analytical expression for mass attenuation coefficients, to calculate the overall energy transmitted to an x-ray imaging system and thus to simulate any x-ray projection experiment. In particular, spectral purity, which is a measure of the degree of monochromaticity, can be easily evaluated. In this paper simulations are used to evaluate the effect of each part of an imaging system on the spectral purity. Here we are concerned with the effect of target and/or filter thicknesses and the influence on the purity of the selective absorption efficiency of phosphor screens with x-ray energy. As an example, three targets and two kinds of phosphor screen widely in use in x-ray CCD cameras have been considered.

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“…It was decided to subdivide the electron range into 100 equal steps of length A(ps), since 25 steps are known to be insufficient for accurate representation of electron trajectories in heavy targets such as gold (Bishop 1974). The energy of the electron at the Zth step is then expressed as which is evaluated numerically using a fourth-order Runge Kutta method.…”

Section: As a Final Point It Was Observed When Carrying Out Monte Car...mentioning

confidence: 99%

“…Before concluding it was decided to examine the effect of using different values of m in the overvoltage dependent term. Bishop (1974) has suggested on the basis of the Thompson-Whiddington energy loss expression that a power of 2 would be more appropriate here. However our findings show that this is less satisfactory than the use of WE = 1.65; in fact m = 1.5 might be better than either.…”

Section: 4 the Philibert Modelmentioning

confidence: 99%

A simple Monte Carlo method for simulating electron-solid interactions and its application to electron probe microanalysis

Love

Cox

Scott

1977

J. Phys. D: Appl. Phys.

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A Monte Carlo method based on Curgenven and Duncumb's treatment is described. It is shown that the predictions of the model agree well with experimental backscattered electron energy distributions and $ ( p z ) curves. The model is used to generate $ ( p z ) curves for a wide range of analytical conditions. Based on these data an examination is carried out of the way in which the mean depth of x-ray production varies with electron accelerating voltage, overvoltage and atomic number of the target. An expression for the mean depth is deduced ; the form of this expression is compared with that predicted by the Philibert model.

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The stability of cylindrical reverse domains

Cited by 11 publications

References 2 publications

On the particular importance of vibrational contributions to the static electrical properties of model linear molecules under spatial confinement

On the particular importance of vibrational contributions to the static electrical properties of model linear molecules under spatial confinement

Applications of simulated x-ray spectra to x-ray imaging

A simple Monte Carlo method for simulating electron-solid interactions and its application to electron probe microanalysis

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