scholarly journals Highly accurate nuclear and electronic stopping cross sections derived using Monte Carlo simulations to reproduce measured range data

2017 ◽  
Vol 121 (10) ◽  
pp. 105104 ◽  
Author(s):  
Klaus Wittmaack ◽  
Andreas Mutzke
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Cross Sections ◽  
Range Data ◽  
Measured Range

scholarly journals A complete data set for the simulation of electron transport through gaseous tetrahydrofuran in the energy range 1–100 $$\hbox {eV}$$

2021 ◽  
Vol 75 (12) ◽  
Author(s):  
A. García-Abenza ◽  
A. I. Lozano ◽  
L. Álvarez ◽  
J. C. Oller ◽  
F. Blanco ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Electron Transport ◽  
Monte Carlo Simulations ◽  
Energy Range ◽  
Cross Sections ◽  
Gas Cell ◽  
Data Set ◽  
Total Electron ◽  
Magnetically Confined ◽  
Scattering Cross Sections

Abstract A self-consistent data set, with all the necessary inputs for Monte Carlo simulations of electron transport through gaseous tetrahydrofuran (THF) in the energy range 1–100 eV, has been critically compiled in this study. Accurate measurements of total electron scattering cross sections (TCSs) from THF have been obtained, and considered as reference values to validate the self-consistency of the proposed data set. Monte Carlo simulations of the magnetically confined electron transport through a gas cell containing THF for different beam energies (3, 10 and 70 eV) and pressures (2.5 and 5.0 mTorr) have also been performed by using a novel code developed in Madrid. In order to probe the accuracy of the proposed data set, the simulated results have been compared with the corresponding experimental data, the latter obtained with the same experimental configuration where the TCSs have been measured. Graphic Abstract

scholarly journals Corrigendum: An Investigation of the Accuracy of Numerical Solutions of Boltzmann's Equation for Electron Swarms in Gases with Large Inelastic Cross Sections

1982 ◽  
Vol 35 (4) ◽  
pp. 473 ◽  
Author(s):  
Ivan D Reid
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Cross Sections ◽  
Numerical Solutions ◽  
Computer Codes ◽  
Boltzmann's Equation ◽  
Boltzmann’S Equation

An error has been found in the computer codes used in the Monte Carlo simulations. The correction for this error alters some of the values of Dol by up to several per cent. The conclusions presented in the paper are however not affected.

Monte Carlo test of the T-expansion approach to range and depth calculations at low energies

1979 ◽  
Vol 57 (4) ◽  
pp. 529-538 ◽  
Author(s):  
B. M. Latta
Keyword(s):  
Monte Carlo ◽  
Cross Sections ◽  
Range Data ◽  
Monte Carlo Test ◽  
First Approximation ◽  
Higher Order Terms ◽  
Low Energies ◽  
The Mean ◽  
Light Target ◽  
Equal Spacing

The transport equations for the range and depth are derived in the approximation of equal spacing between collisions. The T-expansion solutions of these equations are compared with results from Monte Carlo simulations in the reduced energy interval from ε = 3.16 × 10−4 to ε = 10−1 for four projectile–target pairs. In the critical region of equal projectile and target masses, the T-expansion solutions for the mean depth were found to converge more rapidly than the mean-range solutions as higher order terms were retained. The greatest errors observed in the first approximation to the mean depth and mean range were, respectively, 21% for Bi on Ge and 59% for Au on Au. In addition, for the case of a heavy projectile on a light target, the standard method of extracting stopping cross sections (S) from experimental range data was investigated. This method, which is based upon the equation for the first approximation to the range, led to an overestimation of S of up to 49% when the method was applied to the Monte Carlo results for Bi on Ge.

X-Ray Emission of Porous Materials In The Scanning Electron Microscope Computed Using Monte Carlo Simulations

1997 ◽  
Vol 3 (S2) ◽  
pp. 883-884 ◽  
Author(s):  
Raynald Gauvin
Keyword(s):  
Monte Carlo ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Monte Carlo Simulations ◽  
Porous Materials ◽  
Cross Sections ◽  
Quantitative Methods ◽  
Electron Trajectories ◽  
X Ray ◽  
Scanning Electron

Conventional quantitative X-ray microanalysis in the scanning electron microscope or in the electron microprobe is valid for specimens of bulk homogeneous composition and with flat and polished surfaces. Quantitative methods, using X-ray microanalysis and Monte Carlo simulations of electron trajectories in solids, have been developed for the chemical analysis of spherical inclusions embedded in a matrix and for multilayered specimens. In this paper, the effect of porosity and of the size of the pores are investigated concerning their effect on X-ray emission using Monte Carlo simulation of electron trajectories in solids since porous materials are of great technological importance.This new Monte Carlo program uses elastic Mott cross-sections to compute electron trajectories and the Joy & Luo modification of the continuous Bethe law of energy loss and the details are given elsewhere. This program assumes that all the pores are spherical and have the same size.

scholarly journals 3-D Finite Element Monte Carlo Simulations of Scaled Si SOI FinFET With Different Cross Sections

2015 ◽  
Vol 14 (1) ◽  
pp. 93-100 ◽  
Author(s):  
Daniel Nagy ◽  
Muhammad A. Elmessary ◽  
Manuel Aldegunde ◽  
Raul Valin ◽  
Antonio Martinez ◽  
...  
Keyword(s):  
Finite Element ◽  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Cross Sections

Electron Scattering in Solids

1990 ◽  
Vol 48 (2) ◽  
pp. 4-5
Author(s):  
Ryuichi Shimizu ◽  
Ze-Jun Ding
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Angular Distribution ◽  
Elastic Scattering ◽  
Electron Scattering ◽  
Cross Sections ◽  
Expansion Method ◽  
Electron Excitation ◽  
Partial Wave Expansion ◽  
Backscattered Electrons

Monte Carlo simulation has been becoming most powerful tool to describe the electron scattering in solids, leading to more comprehensive understanding of the complicated mechanism of generation of various types of signals for microbeam analysis.The present paper proposes a practical model for the Monte Carlo simulation of scattering processes of a penetrating electron and the generation of the slow secondaries in solids. The model is based on the combined use of Gryzinski’s inner-shell electron excitation function and the dielectric function for taking into account the valence electron contribution in inelastic scattering processes, while the cross-sections derived by partial wave expansion method are used for describing elastic scattering processes. An improvement of the use of this elastic scattering cross-section can be seen in the success to describe the anisotropy of angular distribution of elastically backscattered electrons from Au in low energy region, shown in Fig.l. Fig.l(a) shows the elastic cross-sections of 600 eV electron for single Au-atom, clearly indicating that the angular distribution is no more smooth as expected from Rutherford scattering formula, but has the socalled lobes appearing at the large scattering angle.

Low-voltage EDS of magnesium ferrite Dendrites in a FEG-SEM

1996 ◽  
Vol 54 ◽  
pp. 478-479
Author(s):  
Matthew T. Johnson ◽  
Ian M. Anderson ◽  
Jim Bentley ◽  
C. Barry Carter
Keyword(s):  
Monte Carlo ◽  
Quantitative Analysis ◽  
Monte Carlo Simulations ◽  
Cross Section ◽  
Spatial Resolution ◽  
Low Voltage ◽  
Magnesium Ferrite ◽  
X Ray ◽  
Interaction Volume ◽  
Ferrite Spinel

Energy-dispersive X-ray spectrometry (EDS) performed at low (≤ 5 kV) accelerating voltages in the SEM has the potential for providing quantitative microanalytical information with a spatial resolution of ∼100 nm. In the present work, EDS analyses were performed on magnesium ferrite spinel [(MgxFe1−x)Fe2O4] dendrites embedded in a MgO matrix, as shown in Fig. 1. spatial resolution of X-ray microanalysis at conventional accelerating voltages is insufficient for the quantitative analysis of these dendrites, which have widths of the order of a few hundred nanometers, without deconvolution of contributions from the MgO matrix. However, Monte Carlo simulations indicate that the interaction volume for MgFe2O4 is ∼150 nm at 3 kV accelerating voltage and therefore sufficient to analyze the dendrites without matrix contributions.Single-crystal {001}-oriented MgO was reacted with hematite (Fe2O3) powder for 6 h at 1450°C in air and furnace cooled. The specimen was then cleaved to expose a clean cross-section suitable for microanalysis.

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