Transverse electron scattering form factors at low momentum transfer: Sensitivity to in-medium modifications of vector mesons?

2000 ◽  
Vol 62 (3) ◽  
Author(s):  
P. von Neumann-Cosel ◽  
F. Neumeyer ◽  
B. Reitz ◽  
A. Richter ◽  
J. Wambach
Keyword(s):  
Momentum Transfer ◽  
Electron Scattering ◽  
Form Factors ◽  
Vector Mesons ◽  
Medium Modifications ◽  
Transverse Electron

scholarly journals The Electro-Excitation Form Factors for Low-Lying States of 7Li Nucleus

2010 ◽  
Vol 7 (1) ◽  
pp. 105-112
Author(s):  
Baghdad Science Journal
Keyword(s):  
Shell Model ◽  
Electron Scattering ◽  
Form Factors ◽  
Model Space ◽  
Theoretical Models ◽  
Inelastic Electron ◽  
Oscillator Shell ◽  
21.60 Cs ◽  
Configuration Mixing ◽  
Transverse Electron

The transverse electron scattering form factors have been studied for low –lying excited states of 7Li nucleus. These states are specified by J? T= (0.478MeV), (4.63MeV) and (6.68MeV). The transitions to these states are taking place by both isoscalar and isovector components. These form factors have been analyzed in the framework of the multi-nucleon configuration mixing of harmonic oscillator shell model with size parameter brms=1.74fm. The universal two-body of Cohen-Kurath is used to generate the 1p-shell wave functions. The core polarization effects are included in the calculations through effective g-factors and resolved many discrepancies with experiments. A higher configuration effect outside the 1p-shell model space, such as the 2p-shell, enhances the form factors for q-values and reproduces the data. The present results are compared with other theoretical models. PACS: 25.30.Bf Elastic electron scattering - 25.30.Dh Inelastic electron scattering to specific states – 21.60.Cs Shell model – 27.20. +n 5? A ?19

Inelastic electric and magnetic electron scattering form factors of 24Mg nucleus: Role of g factors

2017 ◽  
Vol 26 (05) ◽  
pp. 1750032 ◽  
Author(s):  
Anwer A. Al-Sammarraie ◽  
M. L. Inche Ibrahim ◽  
Muna Ahmed Saeed ◽  
Fadhil I. Sharrad ◽  
Hasan Abu Kassim
Keyword(s):  
Experimental Data ◽  
Electron Scattering ◽  
Form Factors ◽  
Wave Functions ◽  
Matrix Elements ◽  
Model Hamiltonian ◽  
Transverse Electron ◽  
Magnetic Electron ◽  
Good Agreement

The electric and magnetic transitions in the [Formula: see text]Mg nucleus are studied based on the calculations of the longitudinal and the transverse electron scattering form factors. The universal sd-shell model Hamiltonian (USDA) is used for calculations. The wave functions of radial single-particle matrix elements are calculated using the Skyrme potential. For the longitudinal form factors, a good agreement is obtained between the calculations and the experimental data. For the transverse form factors, the effective [Formula: see text] factors are made as adjustable parameters in order to describe the experimental data.

scholarly journals Elastic transverse electron scattering form factors of 11Li exotic nucleus

2019 ◽  
Vol 12 (23) ◽  
pp. 65-72
Author(s):  
B. S. Hameed
Keyword(s):  
Shell Model ◽  
Electron Scattering ◽  
Exotic Nucleus ◽  
Form Factors ◽  
Model Space ◽  
Model Calculations ◽  
Plane Wave Born Approximation ◽  
The Difference ◽  
Elastic Transverse ◽  
Transverse Electron

        The elastic transverse electron scattering form factors have been studied for the 11Li   nucleus using the Two- Frequency Shell Model (TFSM) approach. The single-particle wave functions of harmonic-oscillator (HO) potential are used with two different oscillator parameters bcore and bhalo. According to this model, the core nucleons of 9Li nucleus are assumed to move in the model space of spsdpf. The outer halo (2-neutron) in 11Li is assumed to move in the pure 1p1/2, 1d5/2, 2s1/2 orbit. The shell model calculations are carried out for core nucleons using the spsdpf-interaction.  The elastic magnetic electron scattering of the stable 7Li and exotic 11Li nuclei are also investigated through Plane Wave Born Approximation (PWBA). It is found that the difference between the total form factors of unstable isotope (11Li halo) and stable isotope 7Li is in magnitude. The measured value of the magnetic moment is also reproduced.

A symplectic model calculation of transverse electron scattering form factors for 24Mg

1993 ◽  
Vol 318 (2) ◽  
pp. 273-276 ◽  
Author(s):  
M.J. Carvalho ◽  
M.G. Vassanji ◽  
D.J. Rowe
Keyword(s):  
Model Calculation ◽  
Electron Scattering ◽  
Form Factors ◽  
Transverse Electron

Core polarization effects up to 12ℏω in 7Li and 10B nuclei

2019 ◽  
Vol 28 (11) ◽  
pp. 1950102
Author(s):  
Adie D. Salman ◽  
Noor T. Tilab ◽  
Samah A. Al-Ramahi ◽  
I. Hossain
Keyword(s):  
Shell Model ◽  
Momentum Transfer ◽  
Excited States ◽  
Electron Scattering ◽  
Form Factors ◽  
Core Polarization ◽  
Polarization Effects ◽  
Empirical Results ◽  
Hole Excitation ◽  
Reasonable Description

Shell model and core polarization (CP) effects have been used to calculate the transverse and longitudinal electron scattering form factors for 7Li and [Formula: see text]B nuclei. The calculations considered one particle–one hole excitation up to 12[Formula: see text][Formula: see text]. This manner seems to be essential for obtaining the best explanation for empirical results. Therefore, adding the excited states up to 12[Formula: see text][Formula: see text] gives a reasonable description for transverse and longitudinal form factors. Furthermore, with these calculations, it is possible to get a very close location of diffraction minimum, and the behavior of the momentum transfer is described properly at the high configuration for 7Li compared with 6[Formula: see text][Formula: see text] energy.

Elastic Longitudinal Electron Scattering form Factors of 9Be

2011 ◽  
Vol 14 (2) ◽  
pp. 116-122 ◽  
Author(s):  
R.A. Radhi ◽  
◽  
N.M. Adeeb ◽  
A.K. Hashim ◽  
◽  
...  
Keyword(s):  
Electron Scattering ◽  
Form Factors
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