scholarly journals Extended optical model analyses of elastic scattering, direct reaction, and fusion cross sections for theBe9+Pb208system at near-Coulomb-barrier energies

2005 ◽  
Vol 72 (6) ◽  
Author(s):  
W. Y. So ◽  
S. W. Hong ◽  
B. T. Kim ◽  
T. Udagawa
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Coulomb Barrier ◽  
Optical Model ◽  
Direct Reaction

EXTENDED OPTICAL MODEL ANALYSES FOR 9Be + 144Sm SYSTEM NEAR COULOMB BARRIER ENERGIES

2011 ◽  
Vol 26 (05) ◽  
pp. 325-336 ◽  
Author(s):  
W. Y. SO ◽  
K. S. KIM
Keyword(s):  
Elastic Scattering ◽  
Cross Section ◽  
Cross Sections ◽  
Coulomb Barrier ◽  
Optical Model ◽  
Fusion Cross Section ◽  
Reaction Cross ◽  
Direct Reaction ◽  
Cross Section Data ◽  
Section Data

Within the framework of an extended optical model, we study elastic scattering and fusion cross section data for 9 Be + 144 Sm system near Coulomb barrier energies to determine the polarization potential decomposed into direct reaction and fusion parts. We show that the direct reaction and fusion potentials extracted from χ2 analyses separately satisfy the dispersion relation and that the threshold anomaly exhibits in the fusion part. The analyses using only elastic scattering and fusion data can furnish very consistent and reliable predictions of cross sections even though the direct reaction cross section data are not enough. From these analyses, we also obtain the semi-experimental α single and α–α coincidence cross sections, [Formula: see text] and [Formula: see text], for 9 Be + 144 Sm system.

scholarly journals Density distribution effect on the analysis of the 6Li+ 58Ni reaction

2019 ◽  
Vol 17 (3) ◽  
Author(s):  
Fatemeh Torabi ◽  
Elí Francisco Aguilera Reyes
Keyword(s):  
Elastic Scattering ◽  
Density Distribution ◽  
Cross Sections ◽  
Optical Model ◽  
Density Variation ◽  
Polarization Potential ◽  
Direct Reaction ◽  
Weakly Bound ◽  
Density Distributions ◽  
Fusion Data

The effect of density variation on the optical-model (OM) analysis of 6Li + 58Ni is investigated by using bare potentials extracted from different density distributions of the weakly-bound 6Li nucleus. For each of the bare potentials, the real and imaginaru parts of the direct-reaction and fusion polarization potentials are deduced from respective X2 fittings to the elastic scattering and fusion data. The results obtained show that variations in the density distribution of the weakly-bound projectile can change the strengths of the dynamic direct-reaction polarization potential, however, it cannot make a noticeable difference on the OM predictions of fusion cross sections.

scholarly journals The 11B(3He,n0)13N Reaction

1977 ◽  
Vol 30 (2) ◽  
pp. 167 ◽  
Author(s):  
JR Davis ◽  
GU Din
Keyword(s):  
Elastic Scattering ◽  
Excitation Function ◽  
Cross Sections ◽  
Optical Model ◽  
Angular Distributions ◽  
Model Parameters ◽  
Direct Reaction ◽  
Reaction Component

The excitation function from 5�0 to 11� 5 MeV and angular distributions at 5� 2, 6� 5, 8� 0, 9�0, 10'0,11�0 and 12�0 MeV have been obtained for the "B(3He,no)13N reaction. "The data were analysed using an incoherent sum of Hauser-Feshbach and DWBA cross sections. Optical model parameters derived from elastic scattering experiments describe the direct reaction component reasonably well.

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.

4He+Ni elastic scattering near the Coulomb barrier and optical model parameters

2002 ◽  
Vol 91 (4) ◽  
pp. 2438-2442 ◽  
Author(s):  
A. Nurmela ◽  
P. Pusa ◽  
E. Rauhala ◽  
J. Räisänen
Keyword(s):  
Elastic Scattering ◽  
Coulomb Barrier ◽  
Optical Model ◽  
Model Parameters

RELATIVISTIC OPTICAL MODEL FOR PROTON-NUCLEUS ELASTIC SCATTERING

2002 ◽  
Vol 11 (05) ◽  
pp. 425-436 ◽  
Author(s):  
M. Y. H. FARAG ◽  
M. Y. M. HASSAN
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Cross Sections ◽  
Differential Cross ◽  
Optical Potential ◽  
Optical Model ◽  
Potential Model ◽  
Optical Potential Model ◽  
Relativistic Description ◽  
Good Agreement

The relativistic description of the proton-nucleus elastic scattering can be considered within the framework of a relativistic optical potential model. The elastic scattering of proton with the nuclei 12 C , 16 O , 20 Ne , and 24 Mg at 800 MeV and 1.04 GeV are studied for relativistic and nonrelativistic treatments. The real optical potentials and the differential cross sections of these reactions are calculated. The obtained results are compared with the corresponding results obtained from the calculation depending on the Woods–Saxon optical potential which were adjusted to fit the experimental data. The present results are in good agreement with the experimental data.

Microscopic spin-orbit potential for p +6He elastic scattering

2019 ◽  
Vol 28 (09) ◽  
pp. 1950074
Author(s):  
Zakaria M. M. Mahmoud ◽  
Awad A. Ibraheem ◽  
M. A. Hassanain
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Cross Sections ◽  
Optical Model ◽  
Spin Orbit ◽  
Current Form ◽  
Density Distributions ◽  
Orbit Potential ◽  
Scattering Cross Sections ◽  
Good Agreement

In this work, we simultaneously reanalyzed the differential elastic scattering cross-sections ([Formula: see text]) and the vector analyzing power ([Formula: see text]) of [Formula: see text]He elastic scattering. This analysis was performed using the folded optical model for both real central and spin-orbit (SO) potentials, respectively. For the imaginary central, we used the usual Woods-Saxon (WS) form. Three different model density distributions are used to calculate the potential. We aimed to examine the applicability of the microscopically derived SO potential and the structure effect of 6He nucleus. The presence of the [Formula: see text] experimental data of [Formula: see text]He makes it interesting for this study. Our calculations showed that the three densities gave similar predictions for the cross-sections data. The three microscopic SO potentials calculations of [Formula: see text] are not in a good agreement with the experimental data. We concluded that the SO formalism in its current form needs more investigations for exotic halo nuclei.

scholarly journals Elastic scattering, inelastic excitation, and 1n pick-up transfer cross sections for B10 + Sn120 at energies near the Coulomb barrier

2018 ◽  
Vol 98 (2) ◽  
Author(s):  
M. A. G. Alvarez ◽  
M. Rodríguez-Gallardo ◽  
L. R. Gasques ◽  
L. C. Chamon ◽  
J. R. B. Oliveira ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Cross Sections ◽  
Coulomb Barrier ◽  
Inelastic Excitation
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