No abstract available

[en] Using different types of proximity potentials, we have examined the trend of variations of barrier characteristics (barrier height and its position) as well as fusion cross-sections for 50 isotopic systems including various collisions of C, O, Mg, Si, S, Ca, Ar, Ti and Ni nuclei with the 1 ≤ N/Z < 1.6 condition for compound systems. The results of our studies reveal that the relationships between the increase of barrier positions and the decrease of barrier heights are both linear with the increase of the N/Z ratio. Moreover, fusion cross-sections also enhance linearly with the increase of this ratio. (orig.)

[en] In this paper, the proximity formalism which has been recently generalized to calculate the nuclear potential in the fusion reaction of deformed nuclei, employed to study the ³⁵Cl + ⁹²Zr system. We also employ different versions of surface energy coefficients and discuss the effect of surface energy coefficients in the proximity potential. Comparison between results of double-folding (DF) and proximity model (PM) are made. (author)

No abstract available

[en] In this paper, all transition rates of antiprotonic deuterium de-excitation processes have been studied in various initial states and kinetic energies. We have investigated Stark mixing effects in Borie–Leon model. The best experimental data on shift and width of 1S and 2P state have been used to obtain logical rate. (author)

[en] The behaviors of barrier characteristics are analyzed for spherical-oblate systems over different configurations of colliding nuclei. For this purpose, we have extended our previous study [Phys. Rev. C 89 (2014) 054607], it is devoted to optimum “cold” and “hot” configuration] to analyze the same reaction systems in various configurations. The investigation on some chosen systems reveals that the barrier height and its position can be parameterized in times of the different orientations. (paper)

[en] Fission fragment anisotropies have been investigated for various systems produced in heavy-ion reactions at near and sub-barrier energies. In particular, special attention has been paid to the entrance channel dependence of fragment angular anisotropies. The results of our analysis of the fragment angular anisotropies induced by boron, carbon, and oxygen ions on Thorium and Neptunium targets as well as Fluorine ions on Neptunium target indicate strong dependence of fragment anisotropies on the channel spin, in consistence with the predication of the pre-equilibrium model

[en] The α-decay half-lives of the superheavy nuclei are systematically studied using different versions of proximity potential and a exact method to calculate Coulomb potential between spherical and deformed nuclei in the framework of the double folding model. To reproduce the α-decay half-life, the experimental α-decay energy and Wentzel-Kramers-Brillouin approximation have been used. It is found that the computed values by the Ngô 80 are in good compromise with the experimental half-lives in comparison with other versions. Also, by using this version and within $Q_{WS4}$ for determination α-decay energies for superheavy elements, we had predicted the α-decay half-lives for superheavy nuclei which have not been reported yet. The long half-lives with magnitude about 100 seconds are predicted for the superheavy nuclei which are not in stability islands which indicating remarkable stability in comparison with their neighbors. These results are also in good agreement with the predictions of other semi-empirical formulas.

[en] The analysis of the selected fission fragment angular distribution from alpha induced fission is made by using an exact theoretical expression. Theoretical anisotropies obtained with transition state modes are compared with their corresponding experimental values. The agreement between the calculated and experimental values is very good. The values of the statistical parameter K²₀ are used for calculation of the inertia parameters. The results indicate an increase in the moment of inertia. (author)

[en] The Coulomb potential between spherical-deformed and deformed-deformed nuclei has been calculated using the Monte Carlo simulation. The results obtained for the Coulomb potential in the ¹⁶O+²³⁸U and ²⁷Al+⁷⁰Ge reactions are in good agreement with those obtained using the double-folding method. The simulation technique employed here has the ability of calculating the Coulomb potential taking into account the finite diffuseness parameter, all the possible deformation degrees of freedom, and different orientations of the symmetry axes of the target and the projectile nuclei with respect to each other. The accuracy of this simulation technique is high and the computer time taken to do these calculations is much less than those of the double-folding method. (orig.)