scholarly journals Inversion solution to heavy-ion optical model potential at intermediate energies

1996 ◽  
Vol 53 (5) ◽  
pp. 2334-2340 ◽  
Author(s):  
H. M. Fayyad ◽  
T. H. Rihan ◽  
A. M. Awin
Keyword(s):  
Optical Model ◽  
Heavy Ion ◽  
Model Potential ◽  
Intermediate Energies ◽  
Optical Model Potential

Optical model analysis of p + 4He elastic scattering at intermediate energies

1978 ◽  
Vol 56 (8) ◽  
pp. 1116-1121 ◽  
Author(s):  
S. W-L. Leung ◽  
H. S. Sherif
Keyword(s):  
Elastic Scattering ◽  
Cross Section ◽  
Optical Model ◽  
Model Potential ◽  
Scattering Data ◽  
Exchange Potential ◽  
Central Potential ◽  
Intermediate Energies ◽  
Optical Model Potential ◽  
Optical Model Analysis

The conventional optical model potential is used to analyze the p + 4He elastic scattering data in the energy range 100–1150 MeV. Both differential cross section and polarization data are reasonably fitted. The behavior of the volume integral of the real central potential as a function of energy is studied and is found to follow the same trend observed for heavier targets. The energy dependence of the imaginary central potential is also studied. The imaginary spin–orbit term is found to be important in this energy region. In some cases, the rising backward cross section is fitted by introducing a simple real exchange potential.

A simplified optical model description of heavy ion fragmentation

1985 ◽  
Vol 63 (2) ◽  
pp. 135-138 ◽  
Author(s):  
L. W. Townsend ◽  
J. W. Wilson ◽  
J. W. Norbury
Keyword(s):  
Cross Sections ◽  
Optical Model ◽  
Production Cross ◽  
Heavy Ion ◽  
Model Potential ◽  
Model Description ◽  
Fragmentation Model ◽  
Mechanical Formalism ◽  
Optical Model Potential ◽  
Quantum Mechanical Formalism

The fragmentation of 213 MeV/nucleon 40Ar ions by 12C targets is described within the context of a simple abrasion–ablation fragmentation model. The abrasion part of the theory utilizes a quantum-mechanical formalism based upon an optical model potential approximation to the exact nucleus-nucleus multiple-scattering series. The ablation stage of the fragmentation is treated as a compound nucleus evaporation. The decay probabilities for the various particle emission channels are computed using the EVAP-4 Monte Carlo computer program. Predictions for production cross sections for isotopes of sulfur, phosphorus, silicon, and aluminum are made and compared with experimental data. The model is also used to compare predicted and experimental element production cross sections for 1.88 GeV/nucleon 56Fe colliding with 12C and 208Pb targets.

Erratum: Contributions of density-dependent interactions in heavy-ion transfer reactions

1994 ◽  
Vol 72 (9-10) ◽  
pp. 686-696 ◽  
Author(s):  
Ahmed Osman ◽  
A. A. Farra
Keyword(s):  
Optical Model ◽  
Form Factors ◽  
Bound State ◽  
Heavy Ion ◽  
Nucleon Nucleon ◽  
Model Potential ◽  
Effective Density ◽  
Ion Transfer ◽  
Density Dependent ◽  
Optical Model Potential

Heavy-ion reactions with particle transfer are studied using the distorted-wave Born-approximation formalism. Different forms of the distorting optical model potentials are introduced in the initial and final channels. The form factors of the reactions are presented explicitly using modified real Woods–Saxon potentials for the nucleus–nucleus bound-state interactions in the entrance and exit channels. The differential cross sections of heavy-ion transfer reations are calculated numerically using the double-folding model for distorting potentials with an effective density-dependent nucleon–nucleon interaction. The present analyses of the angular distributions introduce good descriptions of the experimental data. The observed backward oscillations are described successfully by the explicit inclusion of the density- and the parity-dependent terms in the distorting optical-model potential calculations. The values of the extracted spectroscopic factors and normalization coefficients obtained are reasonable.

Contributions of density-dependent interactions in heavy-ion transfer reactions

1994 ◽  
Vol 72 (5-6) ◽  
pp. 175-185 ◽  
Author(s):  
Ahmed Osman ◽  
A. A. Farra
Keyword(s):  
Optical Model ◽  
Form Factors ◽  
Bound State ◽  
Heavy Ion ◽  
Nucleon Nucleon ◽  
Model Potential ◽  
Effective Density ◽  
Ion Transfer ◽  
Density Dependent ◽  
Optical Model Potential

Heavy-ion reactions with particle transfer are studied using the distorted-wave Born-approximation formalism. Different forms of the distorting optical model potentials are introduced in the initial and final channels. The form factors of the reactions are presented explicitly using modified real Woods–Saxon potentials for the nucleus–nucleus bound-state interactions in the entrance and exit channels. The differential cross sections of heavy-ion transfer reations are calculated numerically using the double-folding model for distorting potentials with an effective density-dependent nucleon–nucleon interaction. The present analyses of the angular distributions introduce good descriptions of the experimental data. The observed backward oscillations are described successfully by the explicit inclusion of the density- and the parity-dependent terms in the distorting optical-model potential calculations. The values of the extracted spectroscopic factors and normalization coefficients obtained are reasonable.

MICROSCOPIC CALCULATION OF THE OPTICAL-MODEL POTENTIAL

1974 ◽  
Vol 35 (C5) ◽  
pp. C5-7-C5-7
Author(s):  
J. P. JEUKENNE ◽  
A. LEJEUNE ◽  
C. MAHAUX
Keyword(s):  
Optical Model ◽  
Model Potential ◽  
Microscopic Calculation ◽  
Optical Model Potential
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