A. K. Nasirov

Competition between complete fusion and quasi-fission in reactions between massive nuclei. The fusion barrier

Abstract A model of the competition between complete fusion and quasi-fission channels in fusion of two massive nuclei is proposed. The calculation of the evaporation residue cross sections in the reactions 100Mo + 100Mo and 110Pd + 0794 0989 110Pd within this model gives a good agreement with the experimental data. The fusion barrier of a new type in the complete fusion of two massive nuclei is revealed.

Quasifission and fusion-fission in reactions with massive nuclei: Comparison of reactions leading to the Z=120 element

The yields of evaporation residues, fusion-fission, and quasifission fragments in the {sup 48}Ca+{sup 144,154}Sm and {sup 16}O+{sup 186}W reactions are analyzed in the framework of the combined theoretical method based on the dinuclear system concept and advanced statistical model. The measured yields of evaporation residues for the {sup 48}Ca+{sup 154}Sm reaction can be well reproduced. The measured yields of fission fragments are decomposed into contributions coming from fusion-fission, quasifission, and fast-fission. The decrease in the measured yield of quasifission fragments in {sup 48}Ca+{sup 154}Sm at the large collision energies and the lack of quasifission fragments in the {sup 48}Ca+{sup 144}Sm reaction are explained by the overlap in mass angle distributions of the quasifission and fusion-fission fragments. The investigation of the optimal conditions for the synthesis of the new element Z=120 (A=302) show that the {sup 54}Cr+{sup 248}Cm reaction is preferable in comparison with the {sup 58}Fe+{sup 244}Pu and {sup 64}Ni+{sup 238}U reactions because the excitation function of the evaporation residues of the former reaction is some orders of magnitude larger than that for the last two reactions.

Competition between fusion-fission and quasifission processes in the {sup 32}S+{sup 184}W reaction

The angular distributions of fission fragments for the

Capture and fusion dynamics in heavy-ion collisions

^{32}\mathrm{S}+^{184}\mathrm{W}

Friction coefficient for deep-inelastic heavy-ion collisions

reaction at center-of-mass energies of 118.8, 123.1, 127.3, 131.5, 135.8, 141.1, and 144.4 MeV are measured. The experimental fission excitation function is obtained. The anisotropy (

Angular anisotropy of the fusion-fission and quasifission fragments

{\mathcal{A}}_{\mathrm{exp}}

Investigation on the 48Ca+249-252Cf reactions synthesizing isotopes of the superheavy element 118

) is found by extrapolating each fission fragment angular distribution. The measured fission cross sections of the

Appearance of fast-fission and quasi-fission in reactions with massive nuclei

^{32}\mathrm{S}+^{182,184}\mathrm{W}

Microscopic driving potential for a dinuclear system

reaction are decomposed into fusion-fission, quasifission, and fast-fission contributions by the dinuclear system model (DNS). The angular momentum distributions of the dinuclear system and compound nucleus calculated by the DNS model are used to reproduce the experimental capture and fusion excitation functions for both reactions and quantities

Entrance channel effect on the formation of heavy and superheavy nuclei

{K}_{0}^{2}