scholarly journals Microscopic optical potentials for Li isotopes

2020 ◽  
Vol 239 ◽  
pp. 03016
Author(s):  
Wendi Chen ◽  
Hairui Guo ◽  
Weili Sun ◽  
Tao Ye ◽  
Yinlu Han ◽  
...  
Keyword(s):  
Internal Wave ◽  
Cross Sections ◽  
Optical Potential ◽  
Effective Interaction ◽  
Nucleon Nucleon ◽  
Reaction Cross ◽  
Wave Functions ◽  
Density Distributions ◽  
Optical Potentials ◽  
Microscopic Optical Potential

The microscopic optical potentials for Li isotopes (A=6,7) without free parameter are obtained by folding the microscopic optical potentials of their internal nucleons with density distributions generated from corresponding internal wave functions of Li isotopes. An isospin-dependent nucleon microscopic optical potential based on the Skyrme nucleon-nucleon effective interaction is used as the nucleon optical potential. Shell model is employed to construct the internal wave functions of Li isotopes and derive their density distributions of internal nucleons. The Li microscopic optical potentials are used to calculate the elastic-scattering angular distributions and reaction cross sections. The results reproduce experimental data well and are comparable to those calculated by phenomenological optical model potentials in many cases.

MICROSCOPIC NUCLEON–NUCLEUS OPTICAL POTENTIAL WITH REARRANGEMENT EFFECTS BASED ON THE EFFECTIVE SKYRME FORCES

2009 ◽  
Vol 18 (09) ◽  
pp. 1845-1862 ◽  
Author(s):  
V. V. PILIPENKO ◽  
V. I. KUPRIKOV ◽  
A. P. SOZNIK
Keyword(s):  
Cross Sections ◽  
Optical Potential ◽  
Nucleon Nucleon ◽  
Reaction Cross ◽  
Effective Density ◽  
Elastic Neutron ◽  
Calculation Results ◽  
Nucleon Nucleon Interaction ◽  
Reasonable Description ◽  
Microscopic Optical Potential

The nucleon scattering on even–even nuclei in the medium-energy region has been analyzed on the basis of microscopic optical potential (OP) obtained from nuclear-matter calculations with using effective density-dependent nucleon–nucleon interaction of Skyrme type with taking account of the rearrangement potential. Calculations have been performed for volume integrals and rms radii of nucleon–nucleus OP, for energy dependencies of total and total reaction cross sections of neutron– and proton–nucleus scattering and for differential cross sections of the elastic neutron scattering at several energies on various target nuclei. Comparison of the calculation results for the mentioned quantities with corresponding experimental data has been carried out, which has shown a principal possibility of their reasonable description in the framework of the model under consideration.

scholarly journals Importance of α-induced reactions and the inverse (γ,α) process on p-nuclei

2019 ◽  
Vol 34 (38) ◽  
pp. 1950318
Author(s):  
Chirashree Lahiri
Keyword(s):  
Cross Sections ◽  
Mean Field ◽  
Reaction Rates ◽  
Nucleon Nucleon ◽  
Reaction Cross ◽  
Relativistic Mean Field ◽  
Density Distributions ◽  
Nucleon Nucleon Interaction ◽  
Double Folding ◽  
Microscopic Optical Potential

We have calculated astrophysical reaction cross-sections for [Formula: see text] reactions of some nuclei important for the calculation of p-process reaction-decay network. Reaction rates for [Formula: see text]-induced reactions are calculated with the semi-microscopic optical potential constructed using double folding method, where nuclear density distributions for finite nuclei along with the effective nucleon–nucleon interaction are the important components of the folded potential. For this purpose, density distributions of target nuclei are obtained from relativistic mean field approach. Astrophysical reaction cross-section for elastic scattering of [Formula: see text]-particle from [Formula: see text] target is compared with the existing experimental results to constrain the newly formed potential. Further, to check the credibility of the present theoretical framework, the astrophysical S-factor for [Formula: see text] reactions are compared with the experimental observation, wherever available. Finally, an estimate of dominant photodisintegration channels at various astrophysical temperature is discussed for p-nuclei [Formula: see text] and [Formula: see text].

The proton microscopic optical potential based on Skyrme interaction

2018 ◽  
Vol 27 (03) ◽  
pp. 1850023
Author(s):  
Yongli Xu ◽  
Yinlu Han ◽  
Qingbiao Shen
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Optical Potential ◽  
Local Density ◽  
Mass Range ◽  
Reaction Cross ◽  
Light Nuclei ◽  
Skyrme Interaction ◽  
The Green Function ◽  
Microscopic Optical Potential

The proton microscopic optical potential (MOP) based on Skyrme interaction has been achieved by the Green function method in the nuclear matter, and given by the local density approximation (LDA) for finite nuclei. The reaction cross-sections, elastic scattering angular distributions, analyzing powers, and spin-rotation functions are predicted by the obtained proton MOP with Skyrme interaction SkC in the mass range of target nuclei 24[Formula: see text][Formula: see text][Formula: see text]A[Formula: see text][Formula: see text][Formula: see text]209 with incident proton energy below 100[Formula: see text]MeV. These observables are further predicted for some light nuclei and actinide nuclei below 100[Formula: see text]MeV. The prediction is compared with existing experimental data. It is revealed that the obtained proton MOP based on Skyrme interaction SkC can satisfactorily describe the proton–nucleus elastic scattering.

Nuclear mean free paths and transparency at intermediate energies

1983 ◽  
Vol 61 (4) ◽  
pp. 750-753 ◽  
Author(s):  
Paul J. Karol
Keyword(s):  
Cross Sections ◽  
Nucleon Nucleon ◽  
Reaction Cross ◽  
Uniform Density ◽  
Nucleon Interaction ◽  
Density Distributions ◽  
Intermediate Energies ◽  
Soft Spheres ◽  
Nucleon Nucleon Interaction ◽  
Reaction Cross Sections

The soft-spheres model of nuclear reaction cross sections incorporating tapered density distributions is used to evaluate nucleon mean free paths and transparencies at intermediate energies. Comparison with similar calculations employing uniform density distributions shows the latter to give misleading results that nevertheless have been used in recent years as evidence that the physics of the nucleon–nucleon interaction within nuclei is incompletely understood.

scholarly journals Optical Potentials: Microscopic vs. Phenomenological Approaches

2019 ◽  
Vol 223 ◽  
pp. 01015
Author(s):  
Paolo Finelli ◽  
Matteo Vorabbi ◽  
Carlotta Giusti
Keyword(s):  
Optical Potential ◽  
Lead Isotopes ◽  
Nucleon Nucleon ◽  
Chiral Expansion ◽  
Scattering Data ◽  
Proton Scattering ◽  
Optical Potentials ◽  
Elastic Proton ◽  
Microscopic Optical Potential ◽  
Fifth Order

In this work we study the performances of our microscopic optical potential [1, 2], derived from nucleon-nucleon chiral potentials at fifth order (N4LO), in comparison with those of a successful non-relativistic phenomenological optical potential in the description of elastic proton scattering data on tin and lead isotopes at energies around and above 200 MeV. Our results indicate that microscopic optical potentials derived from nucleon-nucleon chiral potentials at N4LO can provide reliable predictions for observables of stable and exotic nuclei, even at energies where the robustness of the chiral expansion starts to be questionable.

scholarly journals A study of 12c +12c nuclear reaction using a new M3Y-type effective interaction

2020 ◽  
Vol 3 (1) ◽  
pp. 133-142
Author(s):  
Ochala Isaiah ◽  
Terver Daniel ◽  
O Fiase Joseph
Keyword(s):  
Cross Sections ◽  
Optical Potential ◽  
Nuclear Reactions ◽  
Effective Interaction ◽  
Heavy Ion ◽  
Reaction Cross ◽  
Double Folding ◽  
Work Done ◽  
Best Fit ◽  
Reaction Cross Sections

This paper is a study of nuclear reactions involving 12C + 12C nuclei carried out with a heavy-ion nucleus-nucleus optical potential derived from a new M3Y-type effective interaction, called B3Y-Fetal, within the framework of optical model at the incident energies of 112, 126.7, 240, 300, 1016 MeV. Folding analyses of the differential cross sections associated with the elastic scattering of the nuclear system, determined at these incident energies with four B3Y-Fetal-based folded potentials constructed from double folding model, have shown the DDB3Y1- and BDB3Y1-Fetal potentials to be the best in excellent agreement with previous work done with the M3Y-Reid. The agreement of the B3Y-Fetal with the famous M3Y-Reid effective interaction, which is also used for folding analysis in this work, is further buttressed and well-established by the findings of this study Herein, the values of the renormalization factor, NR ranging from 1.1117 to 0.8121, obtained with the B3Y-Fetal have been found to be slightly higher, with lower reaction cross sections, aR = 1418 - 1047 millibarns, than NR = 0.9971 - 0.8108 obtained with the M3Y-Reid effective interaction whose accompanying reaction cross sections, being higher, range from 1431 to 1050 millibarns. This depicts the B3Y-Fetal as having a better performance. Additionally, results of folding analyses have shown the best-fit folded potentials, DDB3Y1- and BDB3Y1-Fetal potentials to be in agreement at all incident energies, implying that the cold nuclear matter has an underlying soft equation of state.

Dominance of nucleon-nucleon interactions inα+C12total reaction cross sections

1982 ◽  
Vol 26 (1) ◽  
pp. 301-303 ◽  
Author(s):  
R. M. DeVries ◽  
N. J. DiGiacomo ◽  
J. S. Kapustinsky ◽  
J. C. Peng ◽  
W. E. Sondheim ◽  
...  
Keyword(s):  
Cross Sections ◽  
Nucleon Nucleon ◽  
Reaction Cross ◽  
Nucleon Interactions ◽  
Reaction Cross Sections
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