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.

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.

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.

scholarly journals Total Electron Scattering Cross Sections of He, Ne, Ar, Kr and Xe in the Energy Range 100 eV to 10 000 eV

2009 ◽  
Vol 64 (9-10) ◽  
pp. 665-670
Author(s):  
Xiao-Ming Tan ◽  
Chuan-Lu Yang ◽  
Mei-Shan Wang ◽  
Zhi-Hong Zhang
Keyword(s):  
Energy Range ◽  
Electron Scattering ◽  
Cross Sections ◽  
Model Potential ◽  
Total Electron ◽  
Total Cross Sections ◽  
Optical Model Potential ◽  
Scattering Cross Sections ◽  
Experimental And Theoretical Studies ◽  
Theoretical Results

The total cross sections for electron scattering from He, Ne, Ar, Kr and Xe in the energy range from 100 eV to 10 000 eV have been calculated based on the optical-model potential. Our theoretical results are compared with the available experimental data. The consistency between them is also discussed. At higher energies (over 2000 eV for He, over 5000 eV for Ne, Ar, Kr and Xe), the total cross sections of electron scattering from these atoms are scarce, so our calculations will give a reference for further experimental and theoretical studies.

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.

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.

Using a quadrupole deformed generalized Woods–Saxon plus spin-orbit potential to describe the polarized interaction 7Li→ +12C at 34MeV

2018 ◽  
Vol 27 (10) ◽  
pp. 1850081
Author(s):  
G. A. Alcalá ◽  
J. A. Liendo
Keyword(s):  
Optical Model ◽  
Elastic Interaction ◽  
Electric Quadrupole ◽  
Model Potential ◽  
Inelastic Interaction ◽  
Spin Orbit ◽  
Rotational Model ◽  
Analyzing Powers ◽  
Optical Model Potential ◽  
Coupled Channel

An overall description of the cross-sections and tensor analyzing powers corresponding to the elastic interaction [Formula: see text] at [Formula: see text] has been obtained with a coupled channel analysis using the rotational model. Based on the high electric quadrupole moment of the [Formula: see text] projectile, an optical model potential equal to the sum of a quadrupole deformed generalized Woods–Saxon potential and a standard Spin-Orbit term has been used. The deformed part of the potential induces reorientations and transitions that involve the first four energy states of the [Formula: see text] nucleus. These states are supposed to belong to an inverted [Formula: see text][Formula: see text][Formula: see text] rotational band proposed in the literature. Partial reproductions of the inelastic interaction [Formula: see text] have also been achieved by using the same deformed potential with the same parameter values that describe the elastic interaction. Comparisons are made with previous results obtained from optical model potential and continuum-discretized coupled-channel calculations using the cluster-folding model. The use of a deformed scattering potential introduces a tensor term that allows the reproduction of the tensor analyzing powers.

The effect of breakup of 6Li on elastic scattering and fusion with 28Si at near barrier energies

2016 ◽  
Vol 25 (01) ◽  
pp. 1650003 ◽  
Author(s):  
Mandira Sinha ◽  
Subinit Roy ◽  
P. Basu ◽  
H. Majumdar
Keyword(s):  
Elastic Scattering ◽  
Energy Dependence ◽  
Cross Sections ◽  
Model Potential ◽  
Angular Distributions ◽  
The Real ◽  
Optical Model Potential ◽  
Coupled Channel ◽  
Potential Parameters ◽  
Existing Data

Elastic scattering angular distributions for 6Li+[Formula: see text]Si system were measured at [Formula: see text] and analyzed along with the existing data from the previous measurements in the energy range of [Formula: see text]. The measured cross-sections and the existing data, forming a set of angular distributions over a range of E/[Formula: see text], were analyzed using the phenomenological optical model potential (OMP). Three different sets of potential parameters were used. The energy dependence of the real and the imaginary potential strengths were, subsequently, extracted at the radius of sensitivity ([Formula: see text]) for the system. Continuum Discretized Coupled Channel (CDCC) calculation was performed to explore the contribution of projectile break-up (BU) on the observed energy dependence of the effective potential for elastic scattering of 6Li from [Formula: see text]Si. The energy variation of the strength of the real potential with continuum coupling was found to agree with the energy dependence of the same extracted from the (OMP) analysis at energies around the barrier. But the behavior of the imaginary strength appeared to be different. The calculated fusion cross-sections, including the effect of BU, clearly overestimated the measured fusion excitation function data in the below and near barrier energies but compared well with the data at higher energies.

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