نتایج جستجو برای: coulomb fission

تعداد نتایج: 29987  

Journal: :Nuclear Instruments and Methods in Physics Research 2023

The large angular and momentum acceptance magnetic spectrometer VAMOS++, at GANIL, France, is frequently used for nuclear structure reaction dynamics studies. It provides an event-by-event identification of heavy ions produced in reactions beam energies around the Coulomb barrier. highly non-linear ion optics VAMOS++ requires use trajectory reconstruction methods to obtain high-resolution defin...

سهیلی, سعید, علیزاده, فرزاد,

We have calculated the fission barrier height for 16O+208Pb, 16O+209Bi, 16O+232Th, 16O+238U and 16O+248Cm systems in energy range between 90 MeV to 215 MeV. This method is based on the experimental data for angular anisotropies of fission fragments. In present work, we have used the transition state model (STM) for two different cases: the first case is without neutron emission correction and...

ایمان ضیائیان, , سعید سهیلی, ,

  We have calculated the fission fragment angular anisotropy for 16O + 232Th,12C + 236U , 11B + 237 Np , 14 N + 232 Th , 11B + 235U , 12C + 232Th systems with the saddle point statistical model and compared the fission fragment angular anisotropy for these systems. This comparison was done with two methods a) without neutron correction and b) with neutron correction. Also we studied normal and ...

Journal: :Physics Letters B 2021

For the 68Zn + 112Sn reaction Coulomb parameter Z1Z2 is equal to 1500 that close threshold value for appearance of quasifission process. It was found mass-energy distributions fragments differ significantly from those obtained in 36Ar 144Sm leading formation same composite system 180Hg at similar excitation energies about 50 MeV. In case with ions, mass distribution fissionlike has a wide two-h...

Journal: :Physical Review C 2022

The competition between the quenching of pairing due to repulsive Coulomb interaction and dynamic correlations added by particle number symmetry restoration has been studied in a selected set Fermium Nobelium isotopes using hierarchy Hartree-Fock-Bogoliubov--based approximations restricted variation after projection, all them based on $\mathrm{D}1{\mathrm{M}}^{*}$ parametrization Gogny force. I...

 Fission of 238U nuclei was performed by 45-69 MeV protons at the Cyclotron and Radioisotope Center of Tohoku University in Japan. The fission products originated in the reaction were identified by using gamma spectroscopy. The experimental data show that the charge distribution of isobar fission products follows a Gaussian distribution with a standard deviation independent of the selected mass...

Abediravan, B, Bagherpour, F,

In this study, the electronic structure of armchair silicene nanoribbons (ASiNRs) is investigated for various widths using first-principle calculations and the framework of the density functional theory. Electronic structure of ASiNRs shows a direct band gap which is decreased  with increasing the nanoribbon's width, showing an oscillatory behavior. The effective Coulomb interaction between loca...

شاکری, بنین , پیامی, محمود ,

  In this work, using the liquid drop model in the context of the stabilized jellium model, we have studied the fission of charged Na clusters. In this study we have assumed a deformed non-spherical shape for the cluster. The ground state energies, critical sizes, fission barrier height, and the evaporation energies have been calculated. The results show a better agreement to the experimental r...

جهانفر, سمیه, سخائی, محمود,

 A combined dynamical and statistical model for fission was employed in our calculation. There is no doubt that a Langevin description plus a Monte Carlo treatment of the evaporation processes provide the most adequate dynamical description. In this paper, we would consider a strongly shaped dependent friction force and we use the numerical method rather than the analytical one. The objective o...

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