Resonance electron scattering from adsorbed molecules: Angular distribution of inelastically scattered electrons and application to physisorbedO2on graphite

1989 ◽  
Vol 39 (11) ◽  
pp. 7552-7560 ◽  
Author(s):  
P. J. Rous ◽  
R. E. Palmer ◽  
R. F. Willis
Keyword(s):  
Angular Distribution ◽  
Electron Scattering ◽  
Adsorbed Molecules ◽  
Resonance Electron

Resonance electron scattering by adsorbed molecules: resonance energy versus bond length

1993 ◽  
Vol 287-288 ◽  
pp. A375
Author(s):  
L. Sǐller ◽  
K.M. Hock ◽  
R.E. Palmer ◽  
J.F. Wendelken
Keyword(s):  
Bond Length ◽  
Electron Scattering ◽  
Resonance Energy ◽  
Adsorbed Molecules ◽  
Resonance Electron

Resonance electron scattering by adsorbed molecules: resonance energy versus bond length

1993 ◽  
Vol 287-288 ◽  
pp. 165-168 ◽  
Author(s):  
L. Šiller ◽  
K.M. Hock ◽  
R.E. Palmer ◽  
J.F. Wendelken
Keyword(s):  
Bond Length ◽  
Electron Scattering ◽  
Resonance Energy ◽  
Adsorbed Molecules ◽  
Resonance Electron

Selection rules in resonance electron scattering from adsorbed molecules

1990 ◽  
Vol 41 (7) ◽  
pp. 4793-4796 ◽  
Author(s):  
P. J. Rous ◽  
R. E. Palmer ◽  
E. T. Jensen
Keyword(s):  
Electron Scattering ◽  
Selection Rules ◽  
Adsorbed Molecules ◽  
Resonance Electron

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.

scholarly journals Effects of Compton scattering on the neutron star radius constraints in rotation-powered millisecond pulsars

2019 ◽  
Vol 627 ◽  
pp. A39 ◽  
Author(s):  
Tuomo Salmi ◽  
Valery F. Suleimanov ◽  
Juri Poutanen
Keyword(s):  
Angular Distribution ◽  
Neutron Star ◽  
Energy Spectrum ◽  
Compton Scattering ◽  
Electron Scattering ◽  
Exact Formulation ◽  
Millisecond Pulsars ◽  
X Ray ◽  
Synthetic Phase ◽  
Neutron Star Radius

The aim of this work is to study the possible effects and biases on the radius constraints for rotation-powered millisecond pulsars when using Thomson approximation to describe electron scattering in the atmosphere models, instead of using exact formulation for Compton scattering. We compare the differences between the two models in the energy spectrum and angular distribution of the emitted radiation. We also analyse a self-generated, synthetic, phase-resolved energy spectrum, based on Compton atmosphere and the most X-ray luminous, rotation-powered millisecond pulsars observed by the Neutron star Interior Composition ExploreR (NICER). We derive constraints for the neutron star parameters using both the Compton and Thomson models. The results show that the method works by reproducing the correct parameters with the Compton model. However, biases are found in both the size and the temperature of the emitting hotspot, when using the Thomson model. The constraints on the radius are still not significantly changed, and therefore the Thomson model seems to be adequate if we are interested only in the radius measurements using NICER.

Angular distribution of optical photons from β decay of oriented nuclei

1994 ◽  
Vol 72 (5-6) ◽  
pp. 210-214 ◽  
Author(s):  
A. M. Al-Harkan
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Angular Distribution ◽  
Electron Scattering ◽  
Pure Water ◽  
Β Decay ◽  
Secondary Electrons ◽  
Transparent Media ◽  
Optical Photons ◽  
Polarization States

Internal and external optical bremsstrahlung accompanying the β decay of polarized nuclei were investigated. The features of angular distribution of light photons were analyzed taking into account multiple electron scattering. Monte-Carlo simulation was used to study the fate of β electrons and to calculate the intensity and angular distribution of the optical photons. It is shown that in pure water, the contribution of secondary electrons in the production of photons reaches 30–40%. We suggest using the angular distribution of optical photons to study the polarization states of β isotopes imbedded in transparent media.

Application of the monte carlo method to high energy electron scattering (0.3-1.5 MeV)

1978 ◽  
Vol 36 (1) ◽  
pp. 202-203
Author(s):  
G. Soum ◽  
F. Arnal ◽  
J.L. Balladore ◽  
B. Jouffrey ◽  
P. Verdier
Keyword(s):  
Monte Carlo ◽  
Angular Distribution ◽  
Monte Carlo Method ◽  
Transmission Coefficient ◽  
Electron Scattering ◽  
High Energy ◽  
Angular Aperture ◽  
Method Of Calculation ◽  
Total Transmission ◽  
The Monte Carlo Method

Techniques for using the Monte-Carlo method for studying electron scattering in solids have been developed by several authors (1). The method is used to determine the angular distribution of electrons emerging from amorphous or polycrystalline specimens ; the total transmission and backscattering coefficients can also be obtained.- Method of calculation -Let Iθ be the intensity scattered in the direction making an angle θ with the incident electrons ; thus Iθ represents the number of electrons scattered in this direction within a solid angle Δw = πα2, where α is the semi-angle of the collector as seen from the specimen. For a specimen of thickness x, the angular distribution function may be written:I∘ denotes the intensity of the incident monoenergetic electron beam, Tα the transmission coefficient along the direction of incidence for a semi-angular aperture α and TθN the normalized transmission coefficient in the direction θ

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