Angular Distribution for Eta-Meson Photoproduction from Hydrogen at 775-850 MeV

1968 ◽  
Vol 20 (11) ◽  
pp. 571-574 ◽  
Author(s):  
C. Bacci ◽  
R. Baldini-Celio ◽  
C. Mencuccini ◽  
A. Reale ◽  
M. Spinetti ◽  
...  
Keyword(s):  
Angular Distribution ◽  
Eta Meson ◽  
Meson Photoproduction

Recoil Proton Polarization and Differential Cross Section in Eta-Meson Photoproduction at 890 MeV

1974 ◽  
Vol 36 (1) ◽  
pp. 18-26 ◽  
Author(s):  
Kumataro Ukai ◽  
Ichita Endo ◽  
Katsuhide Yoshida ◽  
Masamichi Hongoh ◽  
Ken Kikuchi ◽  
...  
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Recoil Proton ◽  
Eta Meson ◽  
Meson Photoproduction ◽  
Proton Polarization

THE ETA-MESON PHOTOPRODUCTION ON PROTON

2011 ◽  
Vol 26 (03n04) ◽  
pp. 645-646
Author(s):  
JAN DONOVAL ◽  
PETR BYDŽOVSKÝ
Keyword(s):  
Experimental Data ◽  
Form Factor ◽  
Cross Sections ◽  
Form Factors ◽  
Coupling Constants ◽  
Tree Level ◽  
Recent Experimental Data ◽  
Model Coupling ◽  
Eta Meson ◽  
Meson Photoproduction

We have performed the tree-level calculations of the eta meson photoproduction on proton for photon laboratory energies between 714 and 1500 MeV. The resonances N (1535), N (1710), N (1650), N (1440) and N (1520) were assumed. The form factors were introduced in the hadron vertices to involve the structure of hadrons. The influence of various form factor recipes was investigated. In order to keep gauge invariance, the appropriate contact term was introduced. The parameters of our model (coupling constants, cutoffs) were fitted to recent experimental data of the cross sections and some polarization observables.

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.

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