نتایج جستجو برای: spontaneous fission
تعداد نتایج: 129113 فیلتر نتایج به سال:
The number of neutrons emitted by compound nucleus before reaching the saddle-point ( ν pre) is calculated for 16 8 O+20882Pb , 12 6 C+23692U , 11 5 B+23793Np and 18 8 O+19779Au , h eavy-ion induced fission reaction systems. The behavior of angular anisotropies of fission fragments is normal for 16 8 O+20882Pb and 18 8 O+19779Au reaction systems, since the targets have spherical shapes. For th...
Approximately 0.3 % of binary fission decays observed in the spontaneous or thermal neutron induced fission of a heavy nucleus are accompanied by emission of an energetic light particle or fragment in a direction perpendicular to the axis defined by the separating massive fragments. Considerable theoretical and experimental effort has been directed towards understanding this type of ternary fis...
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...
Simultaneous evaluation of 233,235,238 U and 239,240,241 Pu fission cross sections for fast neutrons up to 200 MeV was performed the JENDL-5 library. Experimental covariances were estimated each experimental dataset or section ratios extracted from EXFOR library, they stored in an database dedicated new evaluation. The expressed by Schmittroth’s roof functions, values on defined incident energy...
Rad52 is a key player in homologous recombination (HR), a DNA repair pathway that is dedicated to double strand breaks repair and recovery of perturbed replication forks. Here we show that fission yeast Rad52 homologue is phosphorylated when S phase cells are exposed to ROS inducers such as ultraviolet A radiation or hydrogen peroxide, but not to ultraviolet C or camptothecin. Phosphorylation d...
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...
Fission tracks in minerals, such as apatite and zircon, generated by energetic nuclear fragments that result from spontaneous fission of U, are used for determining the age and thermal history of Earth’s crust. Taken together with other techniques, the data infer rates of tectonic uplift and landscape evolution [1]. At elevated temperatures, these tracks shrink in size and fragment into section...
Recently, analysis of the optical counterpart AT2017gfo to gravitational wave-detected neutron star merger GW170817 has suggested a promising resolution long-standing debate on mergers as source some heaviest elements. However, making quantitative progress in these areas requires an accounting uncertainties different aspects physics, which is input into simulations merging compact objects and t...
The so-called super-short fission mode, in which a nucleus divides nearly symmetrically into two unusually energetic fragments, competes favorably with the standard asymmetric mode for spontaneous of limited number nuclei near $^{264}\mathrm{Fm}$ but it quickly fades away at finite excitations. We investigate energy-dependent competition between those modes even fermium isotopes from $^{254}\ma...
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