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 TESTING 6,8He DENSITY DISTRIBUTIONS BY CALCULATIONS OF TOTAL REACTION CROSS-SECTIONS OF 6,8He+28Si

2004 ◽  
Vol 13 (03) ◽  
pp. 573-583 ◽  
Author(s):  
V. K. LUKYANOV ◽  
E. V. ZEMLYANAYA ◽  
S. E. MASSEN ◽  
Ch. C. MOUSTAKIDIS ◽  
A. N. ANTONOV ◽  
...  
Keyword(s):  
Cross Sections ◽  
Reaction Cross ◽  
Scattering Data ◽  
Total Reaction ◽  
Density Distributions ◽  
Intermediate Energies ◽  
Limit Model ◽  
Optical Limit ◽  
Nucleus Scattering ◽  
Reaction Cross Sections

Calculations of the 6,8 He +28 Si total reaction cross-sections at intermediate energies are performed on the basis of the Glauber–Sitenko microscopic optical-limit model. The target-nucleus density distribution is taken from the electron-nucleus scattering data, and the 6,8 He densities are used as they are derived in different models. The results of the calculations are compared with existing experimental data. The effects of the density tails of the projectile nuclei as well as the role of shell admixtures and short-range correlations are analyzed.

scholarly journals Elastic scattering of one-proton halo nucleus 17F on different mass targets using semi microscopic potentials

2019 ◽  
Vol 65 (2) ◽  
pp. 168 ◽  
Author(s):  
Awad A. Ibraheem ◽  
Arwa S. Al-Hajjaji ◽  
And M. El-Azab Farid
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Nucleon Nucleon ◽  
Model Potential ◽  
Reaction Cross ◽  
Optical Model Potential ◽  
Nucleon Nucleon Interaction ◽  
Double Folding ◽  
Reaction Cross Sections ◽  
Proton Halo

The elastic scattering of 17F have been studied for different mass targets (e.g. 12C, 14N, 58Ni, 208Pb) at different energies. We used the double folding optical model potential based on the density-dependent DDM3Y effective nucleon-nucleon interaction. Both version of the density distribution of the one-proton halo 17F nucleus has been taken into account in the above mentioned potential. The data for angular distributions of the elastic scattering differential cross section and reaction cross sections has been successfully reproduced at different energies using the above potentials. The energy dependence and the target mass number dependence of scattering in the imaginary volume integrals and the total reaction cross sections has also been studied.

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].

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

DENSITY-DEPENDENT CLUSTER MODEL OF α DECAY

2005 ◽  
Vol 19 (15n17) ◽  
pp. 2365-2368 ◽  
Author(s):  
CHANG XU ◽  
ZHONGZHOU REN
Keyword(s):  
Nuclear Physics ◽  
Cluster Model ◽  
Daughter Nucleus ◽  
Nucleon Nucleon ◽  
Nucleon Interaction ◽  
Α Decay ◽  
Density Dependent ◽  
Density Distributions ◽  
Nucleon Nucleon Interaction ◽  
Double Folding

A new cluster model of α decay is proposed where the effective potential between α-cluster and daughter nucleus is obtained from the double folding integral of the renormalized M3Y nucleon-nucleon interaction and of the density distributions of α particle and daughter nucleus. Without introducing any extra adjustment on the potential, the new model (named as the density-dependent cluster model) can successfully reproduce the experimental half-lives of α decay within a factor of 3. The model also works well for new superheavy elements which are the current interests of nuclear physics and chemistry.

scholarly journals Sensitivity of reaction cross sections to halo nucleus density distributions

1996 ◽  
Vol 53 (6) ◽  
pp. 3009-3013 ◽  
Author(s):  
M. P. Bush ◽  
J. S. Al-Khalili ◽  
J. A. Tostevin ◽  
R. C. Johnson
Keyword(s):  
Cross Sections ◽  
Halo Nucleus ◽  
Reaction Cross ◽  
Nucleus Density ◽  
Density Distributions ◽  
Reaction Cross Sections
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