Abrasion cross sections for 20Ne projectiles at 2.1 GeV/nucleon

1983 ◽  
Vol 61 (1) ◽  
pp. 93-98 ◽  
Author(s):  
L. W. Townsend
Keyword(s):  
Cross Sections ◽  
Optical Model ◽  
Particle Density ◽  
Pauli Exclusion Principle ◽  
Model Potential ◽  
Exclusion Principle ◽  
Potential Approximation ◽  
Single Particle Density ◽  
Particle Density Distribution ◽  
Optical Model Potential

Utilizing eikonal scattering theory, an optical model potential approximation to the exact nucleus–nucleus multiple scattering series is used in an abrasion–ablation collision formalism to predict abrasion cross sections for relativistic 20Ne projectile nuclei. Excellent agreement with recent experimental abrasion results is obtained. The sensitivity of the abrasion predictions to Pauli exclusion principle correlation effects and to the assumed shape of the nuclear single-particle density distribution is also demonstrated.

Systematic nonlocal optical model potential for nucleons

2015 ◽  
Vol 24 (01) ◽  
pp. 1550006 ◽  
Author(s):  
Yuan Tian ◽  
Dan-Yang Pang ◽  
Zhong-Yu Ma
Keyword(s):  
Cross Sections ◽  
Optical Model ◽  
Model Potential ◽  
Nucl Phys ◽  
Angular Distributions ◽  
Model Calculations ◽  
Analyzing Powers ◽  
Optical Model Potential ◽  
Fitting Procedures ◽  
Scattering Cross Sections

Based on the Perey–Buck nonlocal optical model potential, F. Perey and B. Buck, Nucl. Phys. 32 (1962) 353, we obtain a new set of nonlocal optical model potential (NLOMP) parameters for proton and neutron scattering off nuclei. The experimental angular distributions of nucleon scattering off nuclei ranging from 27 Al to 208 Pb with incident energies around 10 MeV to 30 MeV are adopted in the fitting procedures. This NLOMP is energy independent. The chi-squares χ2 obtained in the fittings are comparable to those from the KD03 phenomenological local optical model potentials (OMP) A. Koning and J. Delaroche, Nucl. Phys. A 713 (2003) 231. Good agreement is found in comparisons between optical model calculations using this NLOMP and KD03 in their reproduction to the experimental angular distributions of elastic scattering cross-sections and analyzing powers.

Evaluation of Optical Model Potential Using Neutron Induced Cross Section Reaction for Spherical Uranium-238 Isotope up to 20MeV

2015 ◽  
Vol 59 ◽  
pp. 26-34
Author(s):  
Iman Tarik Al-Alawy ◽  
Ronak Ikram Ali
Keyword(s):  
Experimental Data ◽  
Energy Range ◽  
Cross Section ◽  
Cross Sections ◽  
Optical Model ◽  
Threshold Energy ◽  
Model Potential ◽  
Model Parameters ◽  
Incident Neutron ◽  
Optical Model Potential

The evaluation are based on mainly on the calculations of the nuclear optical model potential and relevant parameters are collected and selected from References Input Parameter Library (RIPL) which is being developed under the international project coordinated by the International Atomic Energy Agency (IAEA). The analyzing of a complete energy range has done starting from threshold energy for each reaction. The cross sections are reproduced in fine steps of incident neutron energy with 0.01MeV intervals with their corresponding errors. The recommended cross sections for available experimental data taken from EXFOR library have been calculated for all the considered neutron induced reactions for U-238 isotopes. The calculated results are analyzed and compared with the experimental data. The optimized optical potential model parameters give a very good agreement with the experimental data over the energy range 0.001-20MeV for neutron induced cross section reactions (n,f), (n,tot), (n,el), (n,inl), (n,2n), (n,3n), and (n,γ) for spherical U-238 target elements.

Applicability of the systematic helium-3 potential for triton-nucleus reactions

2015 ◽  
Vol 24 (01) ◽  
pp. 1550005 ◽  
Author(s):  
Yong-Li Xu ◽  
Hai-Rui Guo ◽  
Yin-Lu Han ◽  
Qing-Biao Shen
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Optical Model ◽  
Model Potential ◽  
Reaction Cross ◽  
Angular Distributions ◽  
Optical Model Potential ◽  
Helium 3 ◽  
Reasonable Description ◽  
Potential Parameters

The elastic scattering angular distributions of triton are calculated by the obtained systematic helium-3 global optical model potential parameters and compared with the available experimental data. These results show that the present global optical model potential can give a reasonable description of the elastic scattering of triton. The total reaction cross-sections of triton as a function of energy per nucleon are also further investigated and the reasonable results are presented.

scholarly journals Optical Model Potential Using CINDA Library for Neutron Induced Cross Section Reactions for Spherical Uranium-235,238 Isotopes

2015 ◽  
Vol 60 ◽  
pp. 66-73
Author(s):  
Iman Tarik Al-Alawy ◽  
Ronak Ikram Ali
Keyword(s):  
Experimental Data ◽  
Energy Range ◽  
Cross Section ◽  
Cross Sections ◽  
Optical Model ◽  
Threshold Energy ◽  
Model Potential ◽  
Model Parameters ◽  
Incident Neutron ◽  
Optical Model Potential

The calculation are based mainly on the nuclear optical model potential and relevant parameters are collected and selected from References Input Parameter Library (RIPL) which is being developed under the international project coordinated by the International Atomic Energy Agency (IAEA). The analyzing of a complete energy range has done starting from threshold energy for each reaction. The cross sections are reproduced in fine steps of incident neutron energy with 0.01MeV intervals with their corresponding errors. The recommended cross sections for available experimental data taken from CINDA library have been calculated for all the considered neutron induced reactions for spherical U-235 and U-238 isotopes. The calculated results are analyzed and compared with the experimental data. The optimized optical potential model parameters give a very good agreement with the experimental data over the energy range 0.001-20MeV for neutron induced cross section reactions (n,f), (n,tot), (n,el), (n,inl), (n,2n), (n,3n), and (n,γ) for spherical U-235 and U-238 target elements.

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.

Elastic scattering of nucleon by the lightest mirror nuclei 3H and 3He using the optical model potential

2020 ◽  
Vol 29 (09) ◽  
pp. 2050078
Author(s):  
Mohammad F. Alshudifat ◽  
M. Serhan ◽  
M. Abusini
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Optical Potential ◽  
Optical Model ◽  
Model Potential ◽  
Angular Distributions ◽  
Spin Orbit ◽  
Individual Volume ◽  
Optical Model Potential ◽  
Potential Parameters

The angular distribution of the nucleon elastic scattering on the lightest mirror nuclei 3H and 3He at incident energies of 6 and 9[Formula: see text]MeV has been analyzed. A new set of phenomenological optical potential parameters has been obtained. A comparison of differential cross-sections has been performed for both elastic scatterings of neutron and proton on the mirror nuclei. The contribution of individual volume, surface, and spin-orbit terms in the optical model potential for the projectiles at different energies was studied. The predicted elastic angular distributions results compared well with the experimental data.

Global optical model potential for alpha projectile

2015 ◽  
Vol 24 (12) ◽  
pp. 1550092 ◽  
Author(s):  
Xin-Wu Su ◽  
Yin-Lu Han
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Cross Sections ◽  
Optical Model ◽  
Mass Range ◽  
Model Potential ◽  
Reaction Cross ◽  
Angular Distributions ◽  
Optical Model Potential ◽  
Reaction Cross Sections

A new set of global phenomenological optical model potential (OMP) parameters for alpha projectile is obtained by simultaneously fitting the experimental data of reaction cross-sections and elastic scattering angular distributions in the mass range of target nuclei [Formula: see text] at incident energies below 386[Formula: see text]MeV. The total reaction cross-sections and elastic scattering angular distributions are calculated and compared with experimental data for different targets. A satisfactory agreement is presented between them.

Global phenomenological optical model potentials for 8,10,11B projectiles

2018 ◽  
Vol 27 (11) ◽  
pp. 1850099 ◽  
Author(s):  
Yong-Li Xu ◽  
Hai-Rui Guo ◽  
Yin-Lu Han ◽  
Qing-Biao Shen
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Cross Sections ◽  
Optical Model ◽  
Model Potential ◽  
Reaction Cross ◽  
Angular Distributions ◽  
Model Potentials ◽  
Optical Model Potential ◽  
Reaction Cross Sections

Based on the obtained [Formula: see text] global optical model potential, the global phenomenological optical model potential for [Formula: see text] projectile is obtained by fitting the experimental data of [Formula: see text] elastic scattering angular distributions from [Formula: see text] to [Formula: see text] targets with incident energies below 100[Formula: see text]MeV. Using the found global optical model potential, the reaction cross-sections are predicted and compared with the available experimental data. Moreover, the elastic-scattering angular distributions and reaction cross-sections for isotopic chain [Formula: see text] projectiles are predicted by the [Formula: see text] global optical model potential at different incident energies. These results are also compared with the corresponding experimental data. The performance shows that the [Formula: see text] global phenomenological optical model potentials can give a satisfactory description for elastic scattering of these projectiles.

Global 6He optical model potential

2016 ◽  
Vol 25 (06) ◽  
pp. 1650033 ◽  
Author(s):  
Xin-Wu Su ◽  
Yin-Lu Han ◽  
Hai-Ying Liang ◽  
Zhen-Dong Wu ◽  
Hai-Rui Guo ◽  
...  
Keyword(s):  
Experimental Data ◽  
Cross Sections ◽  
Optical Model ◽  
Functional Form ◽  
Model Potential ◽  
Reaction Cross ◽  
Angular Distributions ◽  
Constrained Geometry ◽  
Optical Model Potential ◽  
Reaction Cross Sections

A set of global [Formula: see text]He phenomenological optical model potential (OMP) parameters with incident energies up to 250[Formula: see text]MeV is obtained. They are based on a smooth, unique functional form for the energy dependence of the potential depths, and on physically constrained geometry parameters. The available experimental data including the reaction cross-sections and elastic scattering angular distributions from target [Formula: see text]Li to [Formula: see text]Bi are used. The global OMP parameters obtained for [Formula: see text]He are analyzed and used to calculate the reaction for [Formula: see text]He projectile. It is found that the present form of the global OMP can reproduce the experimental data for [Formula: see text]He and [Formula: see text]He projectiles.

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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