نتایج جستجو برای: coulomb fission
تعداد نتایج: 29987 فیلتر نتایج به سال:
Experiments on the production of elements 112-116 in Dubna, Russia, have proven the existence of the enhanced stability of their neutron-rich isotopes. Furthermore, the existence of element 118 has been demonstrated using the Ca beam and the Cf target [1]. The produced 118 isotope has half-life Tα=0.89 +1.07 -0.31 ms in agreement with the theoretical predictions and decays into 114 or 112, whic...
in the present research, we want to simulate the fission process of the excited nucleus 207at produced in fusion reaction 19f+188os in the framework of the modified statistical model with considering the effects of projection of spin about the symmetry axis, k, and temperature. in our simulation, we calculate the fission cross section and anisotropy of the fission fragment angular distribution ...
The Graphene based single electron transistor (SET) as a coulomb blockade device need to be explored .It is a unique device for high-speed operation in a nano scale regime. A single electron transfers via the coulomb barriers, but its movement may be prevented by coulomb blockade, so its effect is investigated in this research. The conditions of coulomb blockade and its controlling factors such...
The recent investigations show that the size and mass number of the target nucleus in the heavy-ion fission reactions are very important for the angular distribution of fission fragments. In this work, we consider the behavior of fission fragment angular anisotropies within the standard saddle-point statistical model for the 168O, 188O, 199F, 2412Mg, 2814Si, 32 16 S+20882Pb fission reaction sy...
The experiments have been performed at five different beam energies around the Coulomb barrier (6.09 to 7.35×A MeV). The spectrometer was covering scattering angles of 35°±7°, corresponding to 56°−84° and 96°−124° in the centre of mass frame. For beam energies beyond 6.9×A MeV we found a broad bump in the mass region 190<A<230 which originates from deep inelastic and quasi-fission products. The...
Infinite nuclear matter mass model and the relativistic mean field theory show strong evidence of new neutron magic numbers 100, 150, 164; proton magic number 78 and new islands of stability around N=100, Z ≃ 62; N=150, Z=78; and N= 164, Z ≃ 90 in the drip-line regions of nuclear chart. It is shown that shell effect stabilizes here the instability due to nuclear force giving rise to a new pheno...
The fusion-fission cross sections of the 4He+238U and 6He+238U systems have been measured, at Louvain-la-Neuve, for energies around and below the Coulomb barrier, using an array of Si detectors surrounding a UF4 target. The data taken with 4He are in good agreement with previous data and with the coupled channel fusion calculation performed with ECIS. The 6He data show a regular trend with a la...
The structure of (15)C, with an s(1/2) neutron weakly bound to a closed-neutron shell nucleus (14)C, makes it a prime candidate for a one-neutron halo nucleus. We have for the first time studied the cross section for the fusion-fission reaction (15)C+(232)Th at energies in the vicinity of the Coulomb barrier and compared it to the yield of the neighboring (14)C+(232)Th system measured in the sa...
A dynamical optimization of the minimum energy cluster structures of Na, K, Rb, and Cs clusters was performed using a many-body potential based on local density calculations. The energetics and vibrational analysis of the neutral clusters in the size range 8,N,310 were calculated, including the free energy as a function of the cluster size and the melting temperature. The fission process due to...
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