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

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 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.

Deformation and orientation effects on reaction cross-sections at intermediate and high energies

2019 ◽  
Vol 28 (03) ◽  
pp. 1950014
Author(s):  
M. Rashdan ◽  
Sh. M. Sewailem
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Local Density ◽  
Nucleon Nucleon ◽  
Reaction Cross ◽  
Glauber Model ◽  
Medium Effects ◽  
High Energies ◽  
The Difference ◽  
Reaction Cross Sections

The effects of deformation and orientation on the nucleus–nucleus and proton–nucleus reaction cross-sections are investigated at intermediate and high energies, in the framework of the Coulomb modified Glauber model. The matter density of the projectile is treated by a deformed Fermi shape with quadrupole and hexadecapole deformations. In-medium effects are included through a local density- and an energy-dependent effective nucleon–nucleon total cross-section. Calculations are performed for the deformed projectiles [Formula: see text] colliding by [Formula: see text] and by protons. It is found that the average of reaction cross-section over all directions of the symmetry axis of the deformed projectile differs by about 2[Formula: see text] compared with that calculated for a spherical projectile with the same rms matter radius as the deformed one. The difference between the cross-sections calculated with and without medium effects is of the order 2[Formula: see text] for both deformed and spherical cases. The integrated reaction cross-sections over all orientation angles provide a consistent explanation of the experimental data. The orientation of the heavy projectile can produce a difference in the calculated cross-section about 35[Formula: see text] for nucleus–nucleus and about 45[Formula: see text] for proton–nucleus. This study is also useful for experiments of polarized beams that have created opportunities to study oriented collisions of deformed nuclei. The method is applied to extract the rms radius of [Formula: see text] and it is found to be about 3.56 and 3.45[Formula: see text]fm when using deformation with and without in-medium effects.

Formation of α clusters in dilute neutron-rich matter

Science ◽  
2021 ◽  
Vol 371 (6526) ◽  
pp. 260-264 ◽  
Author(s):  
Junki Tanaka ◽  
Zaihong Yang ◽  
Stefan Typel ◽  
Satoshi Adachi ◽  
Shiwei Bai ◽  
...  
Keyword(s):  
Cross Sections ◽  
Cluster Formation ◽  
Reaction Cross ◽  
Skin Thickness ◽  
Neutron Skin ◽  
Heavy Nuclei ◽  
Α Decay ◽  
Neutron Skin Thickness ◽  
Reaction Cross Sections ◽  
Α Particles

The surface of neutron-rich heavy nuclei, with a neutron skin created by excess neutrons, provides an important terrestrial model system to study dilute neutron-rich matter. By using quasi-free α cluster–knockout reactions, we obtained direct experimental evidence for the formation of α clusters at the surface of neutron-rich tin isotopes. The observed monotonous decrease of the reaction cross sections with increasing mass number, in excellent agreement with the theoretical prediction, implies a tight interplay between α-cluster formation and the neutron skin. This result, in turn, calls for a revision of the correlation between the neutron-skin thickness and the density dependence of the symmetry energy, which is essential for understanding neutron stars. Our result also provides a natural explanation for the origin of α particles in α decay.

scholarly journals 7Be and 8B reaction dynamics at Coulomb barrier energies

2018 ◽  
Vol 184 ◽  
pp. 02015
Author(s):  
E. Strano ◽  
M. Mazzocco ◽  
A. Boiano ◽  
C. Boiano ◽  
M. La Commara ◽  
...  
Keyword(s):  
Cross Sections ◽  
Coulomb Barrier ◽  
Reaction Cross Section ◽  
Optical Model ◽  
Reaction Dynamics ◽  
Reaction Cross ◽  
Total Reaction Cross Section ◽  
Weakly Bound ◽  
Total Reaction ◽  
Reaction Cross Sections

We investigated the reaction dynamics induced by the 7Be,8B+208Pb collisions at energies around the Coulomb barrier. Charged particles originated by both the col- lisions were detected by means of 6 ΔE-Eres telescopes of a newly developed detector array. Experimental data were analysed within the framework of the Optical Model and the total reaction cross-sections were compared together and with the 6,7Li+208Pb colli-sion data. According to the preliminary results, 7Be nucleus reactivity is rather similar to the 7Li one whereas the 8B+208Pb total reaction cross section appears to be much larger than those measured for reactions induced by the other weakly-bound projectiles on the same target.

7,9,10Be elastic scattering and total reaction cross sections on a12C target

2011 ◽  
Vol 84 (3) ◽  
Author(s):  
J. C. Zamora ◽  
V. Guimarães ◽  
A. Barioni ◽  
A. Lépine-Szily ◽  
R. Lichtenthäler ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Reaction Cross ◽  
Total Reaction ◽  
Reaction Cross Sections

Calculation of proton total reaction cross sections for some target nuclei in incident energy range of 10–600 MeV

2010 ◽  
Vol 73 (10) ◽  
pp. 1700-1706 ◽  
Author(s):  
H. Büyükuslu ◽  
A. Kaplan ◽  
A. Aydin ◽  
E. Tel ◽  
G. Yıldırım
Keyword(s):  
Energy Range ◽  
Cross Sections ◽  
Incident Energy ◽  
Reaction Cross ◽  
Total Reaction ◽  
Reaction Cross Sections
Sign in / Sign up

Export Citation Format

Share Document