scholarly journals ASTROPHYSICAL S-FACTOR FOR 16O+16O WITHIN THE ADIABATIC MOLECULAR PICTURE

2008 ◽  
Vol 17 (10) ◽  
pp. 2194-2198
Author(s):  
ALEXIS DIAZ-TORRES ◽  
LEANDRO ROMERO GASQUES ◽  
MICHAEL WIESCHER
Keyword(s):  
Experimental Data ◽  
Excitation Function ◽  
Cross Section ◽  
Fusion Cross Section ◽  
Resonant Structure ◽  
S Factor ◽  
Molecular Picture

The astrophysical S -factor for 16 O +16 O is investigated within the adiabatic molecular picture. It very well explains the available experimental data. The collective radial mass causes a pronounced resonant structure in the S -factor excitation function, providing a motivation for measuring the 16 O +16 O fusion cross section at deep sub-barrier energies

Fusion and Breakup Reactions of 17S + 208Pb and 15C + 232ThHalo Nuclei Systems

2015 ◽  
Vol 11 (2) ◽  
pp. 2972-2978
Author(s):  
Fouad A. Majeed ◽  
Yousif A. Abdul-Hussien
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Fusion Reaction ◽  
Fusion Cross Section ◽  
Reaction Cross ◽  
Recent Experimental Data ◽  
Barrier Distribution ◽  
Coupled Channel ◽  
Total Fusion ◽  
Full Quantum

In this study the calculations of the total fusion reaction cross section have been performed for fusion reaction systems 17F + 208Pb and 15C + 232Th which involving halo nuclei by using a semiclassical approach.The semiclassical treatment is comprising the WKB approximation to describe the relative motion between target and projectile nuclei, and Continuum Discretized Coupled Channel (CDCC) method to describe the intrinsic motion for both target and projectile nuclei. For the same of comparsion a full quantum mechanical clacualtions have been preforemd using the (CCFULL) code. Our theorticalrestuls are compared with the full quantum mechaincialcalcuations and with the recent experimental data for the total fusion reaction  checking the stability of the distancesThe coupled channel calculations of the total fusion cross section σfus, and the fusion barrier distribution Dfus. The comparsion with experiment proves that the semiclassiacl approach adopted in the present work reproduce the experimental data better that the full quantal mechanical calcautions. 

Effect of entrance channel on dynamics of heavy ions collision

2016 ◽  
Vol 25 (01) ◽  
pp. 1650005
Author(s):  
D. Naderi
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Heavy Ions ◽  
Fusion Cross Section ◽  
Evaporation Residue ◽  
Entrance Channel ◽  
Langevin Equations ◽  
Combined Model ◽  
Fission Process ◽  
Cross Section Formula

A combined dynamical model using concept of dinuclear systems (DNS) and one-dimensional (1D) Langevin equations was applied to investigate the effect of entrance channel on dynamics of heavy ions collision. The [Formula: see text]Si+[Formula: see text]Er, [Formula: see text]O+[Formula: see text]W and [Formula: see text]F+[Formula: see text]Ta reactions which formed the compound nucleus [Formula: see text]Pb have been considered to study this effect. We studied these reactions dynamically and calculated the ratio of evaporation residue cross-section to fusion cross-section [Formula: see text] as a tool for investigation of entrance channel effect. Results of combined model are compared with available experimental data and results of 1D Langevin equations. Obtained results based on combined model are in better agreement with experimental data in comparison with results of Langevin equations. We concluded for [Formula: see text]Si+[Formula: see text]Er and [Formula: see text]F+[Formula: see text]Ta reactions the results of combined model that support the quasi-fission process are different relative to Langevin dynamical approach, whereas for [Formula: see text]O+[Formula: see text]W system the two models give similar results.

85Sr PRODUCTION VIA PROTON INDUCED ON VARIOUS TARGETS USING TALYS 1.0 CODE

2010 ◽  
Vol 25 (18) ◽  
pp. 1541-1552 ◽  
Author(s):  
MAHDI SADEGHI ◽  
TAYEB KAKAVAND ◽  
ZAHRA ALIPOOR
Keyword(s):  
Experimental Data ◽  
Excitation Function ◽  
Cross Section ◽  
Radionuclidic Purity ◽  
Medium Energy ◽  
Maximum Cross Section

TALYS 1.0 code was used to calculate excitation function for proton induced on 85/87/ nat Rb , 89 Y and 88/87/86 Sr targets that lead to produce 85 Sr radioisotope using low and medium energy accelerators. Recommended thickness of the targets according to SRIM code was investigated. Theoretical integral yields for any reaction were computed. The results were compared with experimental data. 85 Rb (p, n)85 Sr process was determined as most interesting one due to radionuclidic purity. The TALYS 1.0 code predicts a maximum cross-section of about 798 mb at 11 MeV for this reaction.

EFFECT OF THE ADIABATIC VIBRATIONAL COUPLING ON THE FUSION OF THE 16O-238U INTERACTION

2003 ◽  
Vol 12 (06) ◽  
pp. 863-873 ◽  
Author(s):  
M. ISMAIL ◽  
M. OSMAN ◽  
KH. A. RAMADAN ◽  
W. SEIF
Keyword(s):  
Experimental Data ◽  
Density Dependence ◽  
Cross Section ◽  
Target Nucleus ◽  
Fusion Cross Section ◽  
Heavy Ion ◽  
Fusion Process ◽  
Vibrational Coupling ◽  
Vibrational Excitations

The effect of both rotation and vibration of a deformed target nucleus on the fusion cross-section and barrier distributions was studied. This was done in the framework of the microscopically derived heavy-ion (HI) potential. Moreover, the effect of target deformation up to β6 and the density dependence of the NN force on the fusion process was studied in the presence of vibrational excitations of the target. The results obtained were compared with experimental data.

Systematic study of deformation effects on fusion cross-sections using various proximity potentials

Open Physics ◽  
2014 ◽  
Vol 12 (6) ◽  
Author(s):  
Tapan Rajbongshi ◽  
Kushal Kalita
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Cross Sections ◽  
Fusion Cross Section ◽  
Proximity Potential ◽  
Deformation Parameters ◽  
Barrier Penetration ◽  
Experimental Fusion ◽  
Static Quadrupole ◽  
Better Than

AbstractThe influence of static quadrupole and hexadecapole (positive & negative) deformation of targets are studied using eleven different versions of nuclear potentials. The height and position of the interaction barrier for the reactions induced by spherical projectile (16O) on the deformed targets such as 166Er, 154Sm and 176Yb have been estimated. It is found that the nucleus-nucleus potential strongly depends on the value of the deformation parameters and orientation of the target. The experimental fusion cross-section of the reactions 16O + 176Yb, 16O +166Er and 16O +154Sm are investigated by applyingWong’s formula using various parameterizations of the proximity potential as well as an assessment of the results of a multi-dimensional barrier penetration model (BPM). The fusion cross-sections by Prox 77, Prox 88, Prox 00, Prox 00DP, Denisov DP, Bass 80, CW 76 and AW 95 potentials are found to be better than the rest in comparison to experimental data.

scholarly journals Simulasi Numerik Reaksi Fusi Nuklir dengan menggunakan Metode Wong

2016 ◽  
Vol 6 (01) ◽  
pp. 50
Author(s):  
Muhammad Zamrun Firihu ◽  
Viska Inda Variani ◽  
J Justina
Keyword(s):  
Experimental Data ◽  
Numerical Simulation ◽  
Cross Section ◽  
Fusion Reaction ◽  
Fusion Cross Section ◽  
Chi Square ◽  
Simulation Results ◽  
The Cross

The numerical simulation for calculating the cross section of fusion reaction is done by using Wong formula. We especially calculated the cross section for the fusion reaction of light systems, i.e. 12C+12C, 16O+12C and 16O+16O reactions. We compared the obtained cross section with experimental data. In order to check the accuracy of the calculations, the chi-square analisys is then permormed. We found that the simulation results of the fusion cross section obtained using Wong Formula well explain the experimetal data of the fusion cross section for the 12C+12C, 16O+12C and 16O+16O reactions. This finding indicates that the Wong formula can be used for studing the fusion reaction of light systems.

scholarly journals A comprehensive analysis of 9Li + 70Zn fusion cross section by using proximity potentials, temperature dependent density distributions and nuclear potentials

2019 ◽  
Vol 65 (5 Sept-Oct) ◽  
pp. 573
Author(s):  
M. Aygun ◽  
Z. Aygun
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Cross Sections ◽  
Fusion Cross Section ◽  
Comprehensive Analysis ◽  
Nuclear Potential ◽  
Saxon Potential ◽  
Temperature Dependent ◽  
Density Distributions ◽  
Dependent Density

The fusion cross section of $^{9}$Li + $^{70}$Zn reaction is studiedin an extensive manner within the framework of different theoreticalapproaches. For this purpose, three different methods which consistof proximity potentials, temperature dependent densities andtemperature dependent nuclear potentials are used in order todetermine the real part of the nuclear potential. The imaginary partis considered as Woods-Saxon potential. The calculated fusion crosssections are compared with the experimental data. The theoreticalresults describe the experimental data very well. It is seen thatthe applied approaches present to be different ways to study thereactions involving fusion cross sections.

SETTING A DIAGRAM APPROACH TO CALCULATING VIBRATED, CENTRIFUGED AND VIBROCENTRIFUGED REINFORCED CONCRETE COLUMNS WITH A VARIATROPIC STRUCTURE

2020 ◽  
pp. 22-34
Author(s):  
Л. Р. Маилян ◽  
С. А. Стельмах ◽  
Е. М. Щербань ◽  
М. П. Нажуев
Keyword(s):  
Experimental Data ◽  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Cross Section ◽  
Concrete Columns ◽  
Reinforced Concrete Columns ◽  
The Cross ◽  
Concrete Elements ◽  
Diagram Approach

Состояние проблемы. Железобетонные элементы изготавливаются, как правило, по трем основным технологиям - вибрированием, центрифугированием и виброцентрифугированием. Однако все основные расчетные зависимости для определения их несущей способности выведены, исходя из основного постулата - постоянства и равенства характеристик бетона по сечению, что реализуется лишь в вибрированных колоннах. Результаты. В рамках диаграммного подхода предложены итерационный, приближенный и упрощенный способы расчета несущей способности железобетонных вибрированных, центрифугированных и виброцентрифугированных колонн. Выводы. Расчет по диаграммному подходу показал существенно более подходящую сходимость с опытными данными, чем расчет по методике норм, а также дал лучшие результаты при использовании дифференциальных характеристик бетона, чем при использовании интегральных и, тем более, нормативных характеристик бетона. Statement of the problem. Reinforced concrete elements are typically manufactured according to three basic technologies - vibration, centrifugation and vibrocentrifugation. However, all the basic calculated dependencies for determining their bearing capacity were derived using the main postulate, i.e., the constancy and equality of the characteristics of concrete over the cross section, which is implemented only in vibrated columns. Results. Within the framework of the diagrammatic approach, iterative, approximate and simplified methods of calculating the bearing capacity of reinforced concrete vibrated, centrifuged and vibrocentrifuged columns are proposed. Conclusions. The calculation according to the diagrammatic approach showed a significantly better convergence with the experimental data than that using the method of norms, and also performs better when using differential characteristics of concrete than when employing integral and particularly standard characteristics of concrete.

An investigation of effects of level density models and gamma ray strength functions on cross-section calculations for the production of 90Y, 153Sm, 169Er, 177Lu and 186Re therapeutic radioisotopes via (n,γ) reactions

2019 ◽  
Vol 108 (1) ◽  
pp. 11-17
Author(s):  
Mert Şekerci ◽  
Hasan Özdoğan ◽  
Abdullah Kaplan
Keyword(s):  
Experimental Data ◽  
Cross Section ◽  
Production Cross Section ◽  
Gamma Ray ◽  
Production Cross ◽  
Level Density ◽  
Experimental Studies ◽  
Level Density Models ◽  
Strength Functions ◽  
Cancer Diseases

Abstract One of the methods used to treat different cancer diseases is the employment of therapeutic radioisotopes. Therefore, many clinical, theoretical and experimental studies are being carried out on those radioisotopes. In this study, the effects of level density models and gamma ray strength functions on the theoretical production cross-section calculations for the therapeutic radioisotopes 90Y, 153Sm, 169Er, 177Lu and 186Re in the (n,γ) route have been investigated. TALYS 1.9 code has been used by employing different level density models and gamma ray strength functions. The theoretically obtained data were compared with the experimental data taken from the literature. The results are presented graphically for better interpretation.

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