scholarly journals Dynamics of Frenkel Excitons in Pentacene

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2219 ◽  
Author(s):  
Sonja Gombar ◽  
Petar Mali ◽  
Milan Pantić ◽  
Milica Pavkov-Hrvojević ◽  
Slobodan Radošević
Keyword(s):  
Experimental Data ◽  
Dispersion Relation ◽  
Electron Scattering ◽  
Brillouin Zone ◽  
Dispersion Curves ◽  
Inelastic Electron ◽  
Inelastic Electron Scattering ◽  
Dispersion Data ◽  
Perturbative Corrections ◽  
Experimental Dispersion

The dispersion relation for noninteracting excitons and the influence of perturbative corrections are examined in the case of pentacene structure. The values of exchange integrals are determined by nonlinear fits to the experimental dispersion data, obtained by the inelastic electron scattering reported in recent experiments. We obtain theoretical dispersion curves along four different directions in the Brillouin zone which possess the same periodicity as the experimental data. We also show that perturbative corrections are negligible since the exciton gap in the dispersion relation is huge in comparison to the exchange integrals.

Calculation of inelastic electron–nucleus scattering form factors of 29Si

2014 ◽  
Vol 23 (09) ◽  
pp. 1450046 ◽  
Author(s):  
A. D. Salman ◽  
N. Al-Dahan ◽  
F. I. Sharrad ◽  
I. Hossain
Keyword(s):  
Experimental Data ◽  
Electron Scattering ◽  
Total Angular Momentum ◽  
Form Factors ◽  
Second Order ◽  
Inelastic Electron ◽  
First Order ◽  
Inelastic Electron Scattering ◽  
Nucleus Scattering ◽  
Energy Configurations

Inelastic electron scattering form factors for 29 Si nucleus with total angular momentum and positive parity (Jπ) and excited energy (3/2+, 1.273 MeV; 5/2+, 2.028 MeV; 3/2+, 2.425 MeV and 7/2+, 4.079 MeV) have been calculated using higher energy configurations outside the sd-shell. The calculations of inelastic form factors up to the first- and second-order with and without core-polarization (CP) effects were compared with the available experimental data. The calculations of inelastic electron scattering form factors up to the first-order with CP effects are in agreement with the experimental data, excepted for states 3/2+(1.273 MeV) and 5/2+(2.028 MeV) and without this effect are failed for all states. Furthermore, the calculations of inelastic electron scattering form factors up to the second-order with CP effects are in agreement with the experimental data for 3/2+(1.273 MeV) and 5/2+(2.028 MeV).

scholarly journals Electromagnetic multipole of positive and negative parity states in 24Mg by elastic and inelastic electron scattering

2019 ◽  
Vol 17 (42) ◽  
pp. 27-41
Author(s):  
NOORI S. Manie
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
Electron Scattering ◽  
Single Particle ◽  
Transition Probabilities ◽  
Form Factors ◽  
Negative Parity ◽  
Inelastic Electron ◽  
Hartree Fock ◽  
Inelastic Electron Scattering

In the present work, the nuclear shell model with Hartree–Fock (HF) calculations have been used to investigate the nuclear structure of 24Mg nucleus. Particularly, elastic and inelastic electron scattering form factors and transition probabilities have been calculated for low-lying positive and negative states. The sd and sdpf shell model spaces have been used to calculate the one-body density matrix elements (OBDM) for positive and negative parity states respectively. Skyrme-Hartree-Fock (SHF) with different parameterizations has been tested with shell model calculation as a single particle potential for reproducing the experimental data along with a harmonic oscillator (HO) and Woods-Saxon (WS) single-particle potentials. The effect of the nuclear effective charge has been implemented via using different folding models; valance, Tassie and Bohr-Mottelson. The evaluated results have been discussed and compared with available experimental data.

scholarly journals The Dipole States of Mas?11 Nuclei

1973 ◽  
Vol 26 (1) ◽  
pp. 7 ◽  
Author(s):  
BM Spicer ◽  
RF Fraser
Keyword(s):  
Experimental Data ◽  
Excitation Function ◽  
Electron Scattering ◽  
Cross Sections ◽  
Inelastic Electron ◽  
Inelastic Electron Scattering

Calculations of the even parity states of mass-ll nuclei in the 1p-2h basis are presented and the results are compared with experimental data from inelastic electron scattering, the llB(y, n) and llB(y, p) cross sections, and the lOB(p, Yo) excitation function.

Deep inelastic electron scattering from 12C

1981 ◽  
Vol 358 ◽  
pp. 287-291 ◽  
Author(s):  
P. Barreau ◽  
M. Bernheim ◽  
M. Brussel ◽  
G.P. Capitani ◽  
J. Duclos ◽  
...  
Keyword(s):  
Electron Scattering ◽  
Inelastic Electron ◽  
Inelastic Electron Scattering ◽  
Deep Inelastic Electron

Deep-inelastic electron scattering from carbon

1983 ◽  
Vol 402 (3) ◽  
pp. 515-540 ◽  
Author(s):  
P. Barreau ◽  
M. Bernheim ◽  
J. Duclos ◽  
J.M. Finn ◽  
Z. Meziani ◽  
...  
Keyword(s):  
Electron Scattering ◽  
Inelastic Electron ◽  
Inelastic Electron Scattering ◽  
Deep Inelastic Electron
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