NSR Query Results
Output year order : Descending NSR database version of May 2, 2024. Search: Author = I.Gontchar Found 67 matches. 2023GO09 Chin.J.Phys.(Taiwan) 84, 392 (2023) I.I.Gontchar, M.V.Chushnyakova Sub-barrier heavy-ion fusion/capture: Accurate accounting for zero-point quadrupole shape oscillations with realistic nucleus-nucleus potential NUCLEAR REACTIONS 54Fe, 58Ni, 144Nd, 148Sm(16O, X), 54Fe, 58,60Ni(58Ni, X), E not given; calculated σ. Comparison with available data.
doi: 10.1016/j.cjph.2023.04.017
2023GO10 Chin.Phys.C 47, 084103 (2023) I.I.Gontchar, M.V.Chushnyakova Experimental nuclear charge density and theoretical description of the above-barrier light heavy-ion fusion process NUCLEAR REACTIONS 12C(12C, X), (16O, X), 16O, 40Ca(16O, X), 40Ca(40Ca, X), E(cm)=10-100 MeV; analyzed available data; deduced nucleus-nucleus potential using the semi-microscopical double-folding model with M3Y-Paris NN-forces, proton and neutron densities, fusion σ.
doi: 10.1088/1674-1137/acd682
2022CH57 Phys.Rev. C 106, 069801 (2022) M.V.Chushnyakova, I.I.Gontchar, O.M.Sukhareva Comment on "Effect of density and nucleon-nucleon potential on the fusion cross section within the relativistic mean field formalism" NUCLEAR REACTIONS 238U(48Ca, X), E=181, 186, 193, 201 MeV; calculated σ(E) for deformed and spherical target. Calculations using single parabolic barrier penetration model with Paris and Reid M3Y NN forces.
doi: 10.1103/PhysRevC.106.069801
2022GO02 Phys.Rev. C 105, 014612 (2022) I.I.Gontchar, M.V.Chushnyakova, O.M.Sukhareva Systematic application of the M3Y NN forces for describing the capture process in heavy-ion collisions involving deformed target nuclei NUCLEAR REACTIONS 59Co, 65Cu, 154Sm, 186W, 238U(16O, X), 181Ta, 197Au, 232Th(19F, X), 50Cr, 59Co(20Ne, X), 197Au, 238U(26Mg, X), 74Ge(27Al, X), 74Ge, 181Ta, 197Au, 238U(40Ar, X), 238U(48Ti, X), 165Ho(56Fe, X), (58Ni, X), E(cm)=20-180 MeV; 58Ni, 124Sn, 132Sn(58Ni, X), 64Ni, 124Sn, 132Sn(64Ni, X), E(cm)/Bz=0.8-1.5; calculated σ(E) using double-folding model (DFM) with the M3Y Paris nucleon-nucleon (NN) forces, with nucleon densities generated from the experimental three-parameter Fermi charge densities; deduced that the density-dependent M3Y NN forces with the finite range exchange part can be mimicked successfully by the zero-range density-independent forces. Comparison with experimental data.
doi: 10.1103/PhysRevC.105.014612
2021CH02 J.Phys.(London) G48, 015101 (2021) M.V.Chushnyakova, I.I.Gontchar, N.A.Khmyrova Detail study of application of the relativistic mean-field effective NN forces for heavy-ion fusion within a dynamical mode NUCLEAR REACTIONS 12C, 16O, 28Si, 32,36S, 92Zr, 144Sm, 204,208Pb(12C, X), 16O, 28Si, 32,36S, 92Zr, 144Sm, 204,208Pb(16O, X), 28Si, 32,36S, 92Zr, 144Sm, 204,208Pb(28Si, X), 32,36S, 92Zr, 144Sm, 204,208Pb(36S, X), (32S, X), E not given; analyzed available data; deduced Coulomb barrier heights, fusion σ.
doi: 10.1088/1361-6471/ab907a
2021CH32 Bull.Rus.Acad.Sci.Phys. 85, 490 (2021) M.V.Chushnyakova, I.I.Gontchar, N.A.Khmyrova, A.A.Klimochkina Relativistic Mean-Field Effective Nucleon-Nucleon Forces in the Dynamic Modeling of Heavy Ion Fusion NUCLEAR REACTIONS 92Zr, 144Sm(16O, X), (12C, X), 208Pb(12C, X), 92Zr(28Si, X), E not given; calculated fusion σ. Comparison with experimental data.
doi: 10.3103/S1062873821050051
2021CH33 J.Phys.(London) G48, 088002 (2021) M.V.Chushnyakova, I.I.Gontchar, N.A.Khmyrova Reply to Comment on 'Detail study of application of the relativistic mean-field effective NN forces for heavy-ion fusion within a dynamical model' NUCLEAR STRUCTURE 22O, 106Zr, 144Sm, 204,208Pb; analyzed available data; deduced nucleus-nucleus interaction potential, changing the SKX Hartree-Fock densities to the RMF impact on σ.
doi: 10.1088/1361-6471/ac0581
2021SU14 Bull.Rus.Acad.Sci.Phys. 85, 508 (2021) O.M.Sukhareva, M.V.Chushnyakova, I.I.Gontchar, A.A.Klimochkina A New Algorithm for Calculating Proton, Neutron, and Charge Densities in Nuclei: Comparisons to Experimental Data NUCLEAR STRUCTURE 40Ca, 50Ti, 58Ni, 90,92,96Zr, 112,116Sn, 204Pb; calculated rms charge radii, proton, neutron, charge densities. Comparison with experimental data.
doi: 10.3103/S106287382105021X
2020CH04 Nucl.Phys. A994, 121657 (2020) M.V.Chushnyakova, M.Bhuyan, I.I.Gontchar, N.A.Khmyrova Above-barrier heavy-ion fusion cross-sections using the relativistic mean-field approach: Case of spherical colliding nuclei
doi: 10.1016/j.nuclphysa.2019.121657
2018GO17 Phys.Rev. C 98, 029801 (2018) I.I.Gontchar, M.V.Chushnyakova Comment on "Temperature dependence of nuclear fission time in heavy-ion fusion-fission reactions'"
doi: 10.1103/PhysRevC.98.029801
2016CH55 Bull.Rus.Acad.Sci.Phys. 80, 938 (2016) M.V.Chushnyakova, I.I.Gontchar Post-scission dissipative motion and fission-fragment kinetic energy
doi: 10.3103/S1062873816080086
2016GO08 J.Phys.(London) G43, 045111 (2016) I.I.Gontchar, M.V.Chushnyakova Describing the heavy-ion above-barrier fusion using the bare potentials resulting from Migdal and M3Y double-folding approaches NUCLEAR STRUCTURE 12C, 16O, 28Si, 32,36S, 92Zr, 144Sm, 204,208Pb; calculated rms charge radii. Comparison with experimental data. NUCLEAR REACTIONS 92Zr, 204,208Pb(12C, X), 92Zr, 144Sm, 204,208Pb(16O, X), 92Zr, 208Pb(28Si, X), 208Pb(32S, X), 204,208(36S, X), E=10-150 MeV; calculated above-barrier fusion σ. Comparison with experimental data.
doi: 10.1088/0954-3899/43/4/045111
2016GO31 Phys.Atomic Nuclei 79, 543 (2016); Yad.Fiz. 79, 356 (2016) I.I.Gontchar, M.V.Chushnyakova Systematic comparison of barriers for heavy-ion fusion calculated on the basis of the double-folding model by employing two versions of nucleon-nucleon interaction COMPILATION 12C, 16O, 28Si, 32,36S, 92Zr, 144Sm, 204,208Pb; compiled nuclear radii, deviations between calculations and data. NUCLEAR REACTIONS 12C, 16O, 32S, 92Zr, 144Sm, 204,208Pb(12C, x), E not given;16O, 28Si, 32S, 92Zr, 144Sm, 204,208Pb(16O, x), E not given;28Si, 92Zr, 144Sm, 204,208Pb(28Si, x), E not given;92Zr, 144Sm, 208Pb(32S, x), E not given;144Sm, 204,208Pb(36S, x), E not given; calculated fission barrier parameters touching point radius, fission barrier height at zero angular momentum.
doi: 10.1134/S1063778816040104
2015CH43 Nucl.Phys. A941, 255 (2015) M.V.Chushnyakova, I.I.Gontchar Approximating the spin distributions in capture reactions between spherical nuclei NUCLEAR REACTIONS 92Zr, 144Sm, 204,208Pb(12C, γ), (16O, γ), E(cm)≈0-70 MeV;92Zr, 208Pb(28Si, γ), E(cm)≈60-120MeV;204Pb(36S, γ), E(cm)≈120 MeV;208Pb(32S, γ), (36S, γ), E≈120 MeV; analyzed, calculated radiative σ; compared to data; deduced spin distribution approximate approach.
doi: 10.1016/j.nuclphysa.2015.06.019
2015CH54 Pramana 85, 653 (2015) M.V.Chushnyakova, I.I.Gontchar Oscillations of the fusion cross-sections in the 16O+16O reaction NUCLEAR REACTIONS 16O(16O, X), E(cm)<40 MeV; analyzed available data; deduced σ oscillations. Fluctuation-dissipation model and the single barrier penetration model calculations.
doi: 10.1007/s12043-014-0917-0
2014CH33 Phys.Rev. C 90, 017603 (2014) M.V.Chushnyakova, R.Bhattacharya, I.I.Gontchar Dynamical calculations of the above-barrier heavy-ion fusion cross sections using Hartree-Fock nuclear densities with the SKX coefficient set NUCLEAR REACTIONS 92Zr, 144Sm, 204,208Pb(12C, X), (16O, X), 92Zr, 208Pb(28Si, X), 208Pb(32S, X), 204,208Pb(36S, X), E above Coulomb barrier of 35-144 MeV; analyzed fusion cross sections; deduced dependence of radial friction strength KR on Coulomb barrier height. Fluctuation-dissipation trajectory model based on the double-folding approach with the density-dependent M3Y NN forces.
doi: 10.1103/PhysRevC.90.017603
2014DE21 Phys.Atomic Nuclei 77, 834 (2014); Yad.Fiz. 77, 882 (2014) Precision of approximate kramers formulas for the fission rate: Canonical and microcanonical ensembles RADIOACTIVITY 232U, 214Ra, 208Pb(SF); calculated fission rates; deduced fission barrier height, deformation dependence.
doi: 10.1134/S1063778814060040
2014GO04 Phys.Rev. C 89, 034601 (2014) I.I.Gontchar, R.Bhattacharya, M.V.Chushnyakova Quantitative analysis of precise heavy-ion fusion data at above-barrier energies using Skyrme-Hartree-Fock nuclear densities NUCLEAR REACTIONS 16O, 28Si, 92Zr, 144Sm, 208Pb(16O, X), 28Si, 92Zr, 208Pb(28Si, X), 208Pb(32S, X), at Barrier height/E(cm)=0.5-1.0; calculated capture fusion σ, transmission coefficients, nucleon and charge densities, rms charge radii, influence of tensor forces on capture σ, potential barrier height and radius, reduced σ. Skyrme-Hartree-Fock (SHF) single barrier penetration model based on Woods-Saxon profile for strong nucleus-nucleus interaction potential. Comparison with experimental data.
doi: 10.1103/PhysRevC.89.034601
2013CH04 Phys.Rev. C 87, 014614 (2013) M.V.Chushnyakova, I.I.Gontchar Heavy ion fusion: Possible dynamical solution of the problem of the abnormally large diffuseness of the nucleus-nucleus potential NUCLEAR REACTIONS 92Zr, 144Sm, 208Pb(16O, X), E(cm)=55, 60, 62, 67 MeV; Calculated time dependence of radial coordinate, radial momentum, dissipative radial force and dissipated energy, strong nucleus-nucleus interaction potentials (Snnp), nucleus-nucleus potentials, capture and fusion σ(E). 208Pb(84Kr, X), E=494, 518, 718 MeV; 165Ho, 209Bi(136Xe, X), E=1130 MeV; calculated capture σ. 206Pb(40Ar, X), 208Pb(50Ti, X), (52Cr, X), (64Ni, X), E not given; calculated dissipative barrier energies. Double-folding model with density-dependent M3Y NN forces. Comparison with other theoretical studies, and with experimental data.
doi: 10.1103/PhysRevC.87.014614
2012GO27 J.Phys.:Conf.Ser. 381, 012089 (2012) I.I.Gontchar, R.A.Kuzyakin, E.G.Pavlova, N.E.Aktaev The nuclear fission process as Brownian motion: modifying the Kramers fission rates
doi: 10.1088/1742-6596/381/1/012089
2012PA36 Bull.Rus.Acad.Sci.Phys. 76, 1098 (2012); Izv.Akad.Nauk RAS, Ser.Fiz 76, 1223 (2012) E.G.Pavlova, N.E.Aktaev, I.I.Gonchar Corrections to Kramers' formula for the fission rate of excited nuclei RADIOACTIVITY 216Th, 204Po, 196Hg(SF); calculated fission rate of excited nuclei for three different potentials; deduced corrections to Kramer's formula, fission rate accuracy.
doi: 10.3103/S1062873812080217
2011GO19 Phys.Rev. C 84, 014617 (2011) Integral Kramers formula for the fission rate versus dynamical modeling: The case of deformation-dependent temperature NUCLEAR STRUCTURE 232U, 214Ra, 208Pb; calculated quasistationary fission (Kramers) rates from excited nuclei using approximate analytical formulas, accounting for the microcanonical nature of the fission process. Comparison with dynamical rates deduced from Smoluchowski equation. Discussed accuracy of the Kramers rates.
doi: 10.1103/PhysRevC.84.014617
2011GO38 J.Phys.:Conf.Ser. 312, 082023 (2011) I.I.Gontchar, N.E.Aktaev, A.L.Litnevsky, E.G.Pavlova Applying Kramers formula for the nuclear fission problem: how accurate is it?
doi: 10.1088/1742-6596/312/4/082023
2010AK04 Phys.Rev. C 82, 059801 (2010) Comment on "Systematic description of evaporation spectra for light and heavy compound nuclei"
doi: 10.1103/PhysRevC.82.059801
2010GO29 Phys.Rev. C 82, 064606 (2010) I.I.Gontchar, M.V.Chushnyakova, N.E.Aktaev, A.L.Litnevsky, E.G.Pavlova Disentangling effects of potential shape in the fission rate of heated nuclei
doi: 10.1103/PhysRevC.82.064606
2009CH07 Bull.Rus.Acad.Sci.Phys. 73, 185 (2009); Izv.Akad.Nauk RAS, Ser.Fiz. 73, 196 (2009) M.V.Chushnyakova, N.E.Aktaev, I.I.Gonchar The effect of difference between neutron and proton density distributions on the nuclei fusion barrier in a double folding model NUCLEAR REACTIONS 132Sn(92Kr, X), (94Kr, X), E not given; 56Ni, 82Kr(132Sn, X), E not given; 56Ni(74Ni, X), (132Sn, X), E not given; 82Kr(56Ni, X), (94Kr, X), (132Sn, X), E not given; calculated fusion barriers.
doi: 10.3103/S1062873809020117
2009GO27 Phys.Rev. C 80, 044601 (2009) Importance of the relaxation stage for adequate modeling of nuclear fission accompanied by light particle emission NUCLEAR STRUCTURE 190Pt, 220Bi, 220Th, 226Ra; calculated numerical fission rate, and dependence of fission probability and average prescission multiplicities of neutrons, protons and α particles on the time of dynamical modeling for fission of compound nuclei using the statistical approach (SA) and the combined dynamical statistical approach (CDSA).
doi: 10.1103/PhysRevC.80.044601
2008GO22 Phys.Atomic Nuclei 71, 1143 (2008); Yad.Fiz. 71, 1171 (2008) I.I.Gontchar, N.A.Ponomarenko, A.L.Litnevsky Effect of the initial excitation energy on the average fission lifetime of nuclei
doi: 10.1134/S106377880807003X
2006GO12 Phys.Rev. C 73, 034610 (2006) I.I.Gontchar, D.J.Hinde, M.Dasgupta, C.R.Morton, J.O.Newton Semi-microscopic calculations of the fusion barrier distributions for reactions involving deformed target nuclei NUCLEAR REACTIONS 154Sm, 186W, 238U(16O, X), E(cm) ≈ 50-90 MeV; 168Er(34S, X), E(cm) ≈ 110-130 MeV; 232Th(19F, X), E(cm) ≈ 80-100 MeV; 238U, 232Th(12C, X), E(cm) ≈ 50-70 MeV; calculated fusion barrier distributions; deduced finite-size effects. Double-folding model.
doi: 10.1103/PhysRevC.73.034610
2006GO28 Phys.Atomic Nuclei 69, 1428 (2006) I.I.Gontchar, M.Dasgupta, D.J.Hinde, J.O.Newton The Finite Size Effects in Fusion of Deformed Nuclei at Incident Energies near the Barrier NUCLEAR REACTIONS 154Sm, 168Er, 186W, 238U(16O, X), 168Er(34S, X), 238U, 232Th(12C, X), E not given; calculated angular-dependent fusion barrier energies, finite-size effects. 154Sm, 186W(16O, X), E ≈ threshold; calculated fusion barrier distributions.
doi: 10.1134/S1063778806080230
2004GO04 Phys.Rev. C 69, 024610 (2004) I.I.Gontchar, D.J.Hinde, M.Dasgupta, J.O.Newton Double folding nucleus-nucleus potential applied to heavy-ion fusion reactions NUCLEAR REACTIONS 208Pb(16O, X), E=70-90 MeV; calculated fusion σ. 208Pb(9Be, X), 92Zr, 204Pb(12C, X), 92Zr, 144,148Sm, 208Pb(16O, X), 144Sm(17O, X), 197Au, 208Pb(19F, X), 92Zr, 144Sm, 208Pb(28Si, X), 89Y(34S, X), (32S, X), 90,96Zr(36S, X), 92Zr(35Cl, X), 90,96Zr, 124Sn(40Ca, X), E not given; calculated fusion barrier energies, related features. Double-folding potential.
doi: 10.1103/PhysRevC.69.024610
2004GO20 Nucl.Phys. A734, 229 (2004) I.I.Gontchar, N.A.Ponomarenko, V.V.Turkin, L.A.Litnevsky The resonance-like dependence of the average fission lifetimes upon the parameters of the excited nucleus NUCLEAR STRUCTURE A=186-238; calculated average fission lifetimes vs excitation energy, angular momentum.
doi: 10.1016/j.nuclphysa.2004.01.041
2004GO33 Nucl.Phys. A734, E41 (2004) Evolution of the fission lifetime distributions for highly excited nuclei with the increase of the fissility parameter NUCLEAR STRUCTURE 186W, 214Po, 238Pu; calculated fission lifetime distributions for excited nuclei. Statistical and dynamical calculations compared.
doi: 10.1016/j.nuclphysa.2004.03.015
2004GO48 Yad.Fiz. 67, 2101 (2004); Phys.Atomic Nuclei 67, 2080 (2004) I.I.Gontchar, N.A.Ponomarenko, V.V.Turkin, L.A.Litnevsky Theoretical Investigation of the Angular-Momentum Dependence of the Mean Fission Lifetime of Excited Nuclei NUCLEAR STRUCTURE 178,182,186,190Pt, 205Pb, 235U; calculated energy and angular momentum dependence of mean fission lifetimes, prescission neutron multiplicities for excited nuclei. Dynamical-statistical model.
doi: 10.1134/1.1825533
2004NE02 Phys.Lett. B 586, 219 (2004) J.O.Newton, R.D.Butt, M.Dasgupta, D.J.Hinde, I.I.Gontchar, C.R.Morton, K.Hagino Systematics of precise nuclear fusion cross sections: the need for a new dynamical treatment of fusion? NUCLEAR REACTIONS 208Pb(16O, X), E(cm)=80-105 MeV; 208Pb(9Be, X), 92Zr, 204Pb(12C, X), 58,62Ni, 92Zr, 112,116Sn, 144,148,154Sm, 182,186W, 194,198Pt, 238U(16O, X), 144Sm(17O, X), 197Au, 208Pb, 232Th(19F, X), 92Zr, 144Sm, 178Hf, 208Pb(28Si, X), 178Hf(29Si, X), 186W(30Si, X), 175Lu(31P, X), 89Y, 208Pb, 232Th(32S, X), 89Y, 168Er(34S, X), 92Zr(35Cl, X), 48Ca, 46,48,50Ti, 90,96Zr, 124Sn, 192Os, 194Pt(40Ca, X), 60Ni(58Ni, X), E not given; analyzed fusion excitation functions; deduced diffuseness parameter, possible dynamical effects.
doi: 10.1016/j.physletb.2004.02.052
2004NE10 Phys.Rev. C 70, 024605 (2004) J.O.Newton, R.D.Butt, M.Dasgupta, D.J.Hinde, I.I.Gontchar, C.R.Morton, K.Hagino Systematic failure of the Woods-Saxon nuclear potential to describe both fusion and elastic scattering: Possible need for a new dynamical approach to fusion NUCLEAR REACTIONS 208Pb(9Be, X), 92Zr, 204Pb(12C, X), 58,62Ni, 92Zr, 112,116Sn, 144,148,154Sm, 182,186W, 194Pt, 208Pb, 238U(16O, X), 144Sm(17O, X), 194Pt(18O, X), 197Au, 208Pb, 232Th(19F, X), 92Zr, 144Sm, 178Hf, 208Pb(28Si, X), 178Hf(29Si, X), 186W(30Si, X), 92Zr(35Cl, X), 175Lu(31P, X), 89Y, 208Pb, 232Th(32S, X), 89Y, 168Er(34S, X), 90,96Zr(36S, X), 48Ca, 46,48,50Ti, 90,96Zr, 124Sn, 192Os, 194Pt(40Ca, X), 48Ca(48Ca, X), 60Ni(58Ni, X), E > barrier; analyzed fusion excitation functions; deduced diffuseness parameters and radii, possible resonance effects, dynamical features.
doi: 10.1103/PhysRevC.70.024605
2003GO30 Nucl.Phys. A722, 479c (2003) I.I.Gontchar, D.J.Hinde, M.Dasgupta, J.O.Newton Surface diffuseness of nuclear potential from heavy-ion fusion reactions NUCLEAR REACTIONS 208Pb(16O, X), (28Si, X), E ≈ threshold; calculated fusion σ, role of surface diffuseness. Semi-microscopic double folding model, comparison with data.
doi: 10.1016/S0375-9474(03)01412-X
2002BU08 Phys.Rev. C65, 044606 (2002); Erratum Phys.Rev. C65, 069904 (2002) R.D.Butt, M.Dasgupta, I.Gontchar, D.J.Hinde, A.Mukherjee, A.C.Berriman, C.R.Morton, J.O.Newton, A.E.Stuchbery, J.P.Lestone Effects on Finite Ground-State Spin on Fission Fragment Angular Distributions following Collisions with Spherical or Deformed Nuclei NUCLEAR REACTIONS 209Bi(16O, F), E(cm) ≈ 76 MeV; 232Th(10B, F), E(cm) ≈ 46 MeV; 176Lu(31P, F), E(cm) ≈ 122 MeV; 178,178mHf(28Si, X), E ≈ 116 MeV; calculated fission fragments angular distributions, dependence on target spin.
doi: 10.1103/PhysRevC.65.044606
2002GO05 Phys.Rev. C65, 034610 (2002) I.I.Gontchar, M.Dasgupta, D.J.Hinde, R.D.Butt, A.Mukherjee Importance of Geometrical Corrections to Fusion Barrier Calculations for Deformed Nuclei NUCLEAR REACTIONS 154Sm(16O, X), E=45-70 MeV; calculated fusion barriers, σ; deduced deformation effects.
doi: 10.1103/PhysRevC.65.034610
2002GO08 Europhys.Lett. 57, 355 (2002) I.Gontchar, M.Morjean, S.Basnary Nuclear Dissipation from Fission Time NUCLEAR STRUCTURE 235,237U; analyzed scission times, pre-equilibrium neutron and γ-ray multiplicities for excited nuclei; deduced sensitivity to nuclear dissipation. NUCLEAR REACTIONS 208Pb(16O, F), E=128, 140 MeV; analyzed scission times, pre-equilibrium neutron and γ-ray multiplicities; deduced sensitivity to nuclear dissipation.
doi: 10.1209/epl/i2002-00467-y
2002HI25 J.Nucl.Radiochem.Sci. 3, No 1, 31 (2002) D.J.Hinde, A.C.Berriman, R.D.Butt, M.Dasgupta, I.I.Gontchar, C.R.Morton, A.Mukherjee, J.O.Newton Role of Entrance-channel Dynamics in Heavy Element Synthesis NUCLEAR REACTIONS 238U(16O, X), E(cm) ≈ 70-100 MeV; 208Pb, 232Th(32S, X), E(cm) ≈ 130-170 MeV; measured barrier distributions, fission fragment mass distributions. 204Pb(12C, xn), 197Au(19F, xn), 186W(30Si, xn), E* ≈ 20-90 MeV; measured fusion, fission, evaporation residue σ; deduced entrance channel effects.
2002WA25 Yad.Fiz. 65 1438 (2002); Phys.Atomic Nuclei 65, 1403 (2002) W.Wagner, I.I.Gontchar, A.E.Gettinger, L.A.Litnevsky, H.G.Ortlepp, D.V.Kamanin Novel Features of the Fragment Mass Variance in Fission of Hot Nuclei NUCLEAR REACTIONS 232Th(7Li, X), E=43 MeV/nucleon; 197Au(14N, X), E=34 MeV/nucleon; analyzed fission fragment mass variance vs excitation energy. Dynamical stochastic model.
doi: 10.1134/1.1501651
2000GE02 J.Phys.(London) G26, 347 (2000) Is the Approximation of Overdamping Applicable in Order to Describe the Dynamics of Fission of Excited Nuclei ? NUCLEAR STRUCTURE 216Fr; calculated potential energy curve, fission rate vs excitation energy. Overdamping approximation.
doi: 10.1088/0954-3899/26/4/301
2000GO44 Yad.Fiz. 63, No 10, 1778 (2000); Phys.Atomic Nuclei 63, 1688 (2000) I.I.Gontchar, A.E.Gettinger, L.V.Guryan, W.Wagner Multidimensional Dynamical-Statistical Model for Describing the Fission of Excited Nuclei NUCLEAR STRUCTURE 200Pb, 222Th, 180Hf, 260Fm; calculated fission barriers vs deformation, angular momentum. 220Rn; calculated fission rate vs time for excited nucleus. 218Ra; calculated fission probability, neutron multiplicity vs excitation energy, related features. 251No; calculated fission fragment mass distributions. Multidimensional dynamical-statistical model. NUCLEAR REACTIONS 183W, 198Pt, 197Au, 206Pb, 232Th, 233U, 239Pu(12C, F), E=97 MeV; 182,183W, 198Pt, 197Au, 204,206,208Pb, 232Th, 233U, 239Pu, 249Cf(16O, F), E=108-145 MeV;232Th, 246Cm, 197Au, 238U, 169Tm(18O, F), E=103-158 MeV; calculated fission fragment mass distributions. Multidimensional dynamical-statistical model.
doi: 10.1134/1.1320138
1998FR04 Phys.Rep. 292, 131 (1998) Langevin Description of Fusion, Deep-Inelastic Collisions and Heavy-Ion-Induced Fission
doi: 10.1016/S0370-1573(97)00042-2
1997GO19 Z.Phys. A359, 149 (1997) Dependence of Nuclear Dissipation Upon Deformation or Temperature: Analysis of the data using a Langevin-Monte-Carlo approach NUCLEAR REACTIONS 208Pb(16O, X), E not given; analyzed pre-scission, pre-fission neutron multiplicities, evaporation residue σ vs excitation energy; 181Ta(19F, X), E not given; analyzed pre-scission, pre-fission neutron multiplicities, fission probabilities vs excitation energy; 181Ta(19F, X), E=90-140 MeV; 208Pb(16O, X), 208Pb, W(32S, X), E not given; analyzed pre-scission GDR gamma multiplicities; deduced deformation, temperature dependence, average friction strength role. Combined dynamical statistical model.
doi: 10.1007/s002180050382
1995ER07 Phys.Lett. 353B, 432 (1995) N.V.Eremin, G.Giardina, I.I.Gontchar A Strong Isotopic Effect in Prescission Charged Particle Multiplicities NUCLEAR REACTIONS 249Bk(p, F), 246Cm(α, F), 241Pu(9Be, F), 238U(12C, F), 230Ra(20Ne, F), E not given; calculated prescission, prefission, saddle-to-scission neutron multiplicity vs fissioning nucleus spin. 242,244,246,248,250,252,254Cm(α, F), E not given; calculated prescission, prefission, saddle-to-scission for α, n, p; deduced strong isotopic dependence. Combined dynamical statistical model.
doi: 10.1016/0370-2693(95)00591-8
1995GO41 Fiz.Elem.Chastits At.Yadra 26, 932 (1995); Phys.Part.Nucl 26, 394 (1995) Langevin Fluctuation-Dissipation Fission Dynamics of Excited Nuclei NUCLEAR REACTIONS 170Er(28Si, F), 181Ta(20Ne, X), E=80-200 MeV; 208Pb(16O, F), E=70-130 MeV; 142Nd(16O, F), 232Th, 181Ta(19F, F), E ≈ 80-200 MeV; analyzed data on these, other fission reactions; deduced fission mode dissipative properties associated observables clarification.
1994GO14 Nucl.Phys. A575, 283 (1994) Dynamics of the Thermal Decay of a Metastable System Over a Multiple-Humped Barrier
doi: 10.1016/0375-9474(94)90190-2
1994GO40 Yad.Fiz. 57, No 7, 1249 (1994); Phys.Atomic Nuclei 57, 1181 (1994) Damping Coefficient of the Fission Mode: Analysis of experimental data with a combined dynamical and statistical model NUCLEAR REACTIONS 206Pb(16O, F), 197Au(20Ne, F), E not given; analyzed evaporation residue σ(E), other fission data; deduced fission mode deformation dependent reduced friction coefficient features. Combined dynamical Langevin, statistical models.
1994HI07 Yad.Fiz. 57, No 7, 1255 (1994); Phys.Atomic Nuclei 57, 1187 (1994) D.Hilscher, I.I.Gontchar, H.Rossner Fission Dynamics of Hot Nuclei and Nuclear Dissipation NUCLEAR REACTIONS 208Pb(16O, F), E=120 MeV; analyzed fission (fragment)γ-coin data; deduced fission process time scale at moderate to high excitation. 197Au(16O, F), (18O, F), 181Ta(20Ne, F), E not given; analyzed prescission neutron multiplicity, excitation energy at scission; deduced fission dynamics. Many other reactions included. NUCLEAR STRUCTURE A=115-260; compiled, reviewed postscission neutron multiplicity data; deduced fission process time scale at moderate to high excitation.
1993FR09 Nucl.Phys. A556, 281 (1993) P.Frobrich, I.I.Gontchar, N.D.Mavlitov Langevin Fluctuation-Dissipation Dynamics of Hot Nuclei: Prescission neutron multiplicities and fission probabilities NUCLEAR REACTIONS 142Nd(16O, F), 232Th, 159Tb, 169Tm, 181Ta(19F, F), 170Er(30Si, F), 208Pb, 197Au(16O, F), E not given; calculated prescission neutron multiplicities, fission probabilities vs excitation energy, fission yield, time distributions. Langevin fluctuation-dissipation dynamics, hot nuclei.
doi: 10.1016/0375-9474(93)90352-X
1993FR15 Nucl.Phys. A563, 326 (1993) What are Sensitive Probes for Nuclear Friction in Heavy-Ion Induced Fission ( Question ) NUCLEAR REACTIONS 208Pb(16O, F), E=70-270 MeV; analyzed fission σ(E), other data, particle, γ-spectra; deduced nuclear friction related sensitive probes.
doi: 10.1016/0375-9474(93)90607-Y
1993GO07 Phys.Rev. C47, 2228 (1993) I.I.Gontchar, P.Frobrich, N.I.Pischasov Consistent Dynamical and Statistical Description of Fission of Hot Nuclei NUCLEAR STRUCTURE 235U, 206Pb; calculated fission saddle points position. 219Ac; calculated Langevin trajectories. 209Bi; calculated fission rates. Dynamical, statistical description, hot nucleus fission.
doi: 10.1103/PhysRevC.47.2228
1993LA01 Phys.Rev.Lett. 70, 1220 (1993) Yu.A.Lazarev, I.I.Gontchar, N.D.Mavlitov Long-Lifetime Fission Component and Langevin Fluctuation-Dissipation Dynamics of Heavy-Ion Induced Nuclear Fission NUCLEAR REACTIONS 181Ta(19F, F), E=80-140 MeV; 232Th(19F, F), E=98 MeV; 208Pb(32S, F), E=176 MeV; analyzed fission data; deduced long T1/2 fission component features. Langevin fluctuation-dissipation dynamics.
doi: 10.1103/PhysRevLett.70.1220
1992GO08 Yad.Fiz. 55, 920 (1992); Sov.J.Nucl.Phys. 55, 514 (1992) I.I.Gonchar, G.I.Kosenko, N.I.Pischasov, O.I.Serdyuk Calculation of the Moments of the Fission-Fragment Energy Distribution by the Method of Langevin Equations NUCLEAR STRUCTURE Z=54-104; calculated fission fragment energy distribution, moments. Langevin equations, fluctuation dissipation dynamics.
1992MA26 Z.Phys. A342, 195 (1992) N.D.Mavlitov, P.Frobrich, I.I.Gonchar Combining a Langevin Description of Heavy-Ion Induced Fission Including Neutron Evaporation with the Statistical Model NUCLEAR REACTIONS 181Ta(19F, X), E=80-130 MeV; calculated fusion σ, fission probability vs E, pre-fission neutron multiplicity. Kramers modified statistical model, Langevin dynamical calculations.
doi: 10.1007/BF01288469
1991GO18 Yad.Fiz. 53, 1567 (1991); Sov.J.Nucl.Phys. 53, 963 (1991) Effect of the Spin Distribution of Compound Nuclei on the Multiplicity of Prefission Neutrons in Reactions with Heavy Ions NUCLEAR REACTIONS 170Er(30Si, X), E ≈ 120-160 MeV; calculated partial fusion σ. 150Sm(16O, F), E not given; 181Ta(19F, F), E=80-140 MeV; calculated prefission neutron multiplicity vs E; deduced compound nucleus initial spin distribution role.
1989AD08 Yad.Fiz. 50, 1242 (1989) G.D.Adeev, I.I.Gonchar, V.V.Pashkevich, O.I.Serdyuk Relaxation Times of Collective Modes in Fission of Excited Nuclei NUCLEAR STRUCTURE 235U; calculated different fission mode relaxation times.
1988AD10 Fiz.Elem.Chastits At.Yadra 19, 1229 (1988); Sov.J.Part.Nucl 19, 529 (1988) G.D.Adeev, I.I.Gonchar, V.V.Pashkevich, N.I.Pischasov, O.I.Serdyuk Diffusion Model of the Formation of Fission-Fragment Distributions NUCLEAR STRUCTURE 252Fm, 205At, 235U; calculated dynamical trajectories at fission. 198Pb, 240U; calculated fission fragment energy, mass distributions. 200Hg, 230Th, 252Cf, 212At; calculated fission fragment energy excess, distribution asymmetry coefficient. Other fission characteristics discussed.
1987SE16 Yad.Fiz. 46, 710 (1987); Sov.J.Nucl.Phys. 46, 399 (1987) O.I.Serdyuk, G.D.Adeev, I.I.Gonchar, V.V.Pashkevich, N.I.Pischasov Mass-Energy Distribution of Fission Fragments in the Diffusion Model NUCLEAR STRUCTURE 234Pu, 209Po, 200Tl; calculated fission fragment kinetic energy vs dispersion. 206Pb, 223Ra, 252Cf, 212At, 198Hg; calculated fission fragment kinetic energy excess, asymmetry coefficient.
1986AD03 Yad.Fiz. 43, 1137 (1986) G.D.Adeev, I.I.Gonchar, L.A.Marchenko, N.I.Pischasov Fluctuative-Dissipative Dynamics of Formation of Mass Distribution of Fission Fragments NUCLEAR STRUCTURE 248Fm, 205At, 221Pa; calculated fission fragment mass distribution variances; deduced mass dispersion angular momentum dependence. Fokker-Planck equation.
1985AD02 Z.Phys. A320, 451 (1985) The Dynamical Description of the Mass Distribution of Fission Fragments NUCLEAR STRUCTURE 248Cf; calculated potential energy dependence on parameters. 252Fm, 248Cf, 236U, 212At, 196Pt; calculated fission stiffness coefficient vs elongation parameters. Pt, Tl, Pb, Bi, Rn, Ra, At, Ac, Th, U, Pu, Cm, Cf, Fm; calculated fission stiffness coefficient vs fissility parameter. 238U; calculated fission fragment mass distribution variance vs friction parameter. Fokker-Planck equation.
doi: 10.1007/BF01415722
1985AD07 Yad.Fiz. 42, 42 (1985) G.D.Adeev, I.I.Gonchar, L.A.Marchenko Fluctuation-Dissipation Dynamics of Formation of Charge Distribution of Fission Fragments NUCLEAR STRUCTURE 236U; calculated fission fragment charge distribution parameters. Fokker-Planck equation.
1985AD13 Z.Phys. A322, 479 (1985) A Simplified Two-Dimensional Diffusion Model for Calculating the Fission-Fragment Kinetic-Energy Distribution NUCLEAR STRUCTURE 200Tl, 206Bi, 212At, 230Th, 236U, 240Pu, 244Cm, 248Cf, 252Fm; calculated fission fragment kinetic energy distribution, stiffness coefficient, fissility parameter. Two-dimensional diffusion model.
doi: 10.1007/BF01412083
1984AD08 Yad.Fiz. 40, 869 (1984) Fluctuation-Dissipation Dynamics of Formation of the Energy Distribution of Fission Fragments NUCLEAR STRUCTURE 230Th, 236U, 240Pu, 244Cm, 248Cf, 252Fm; analyzed fission fragment kinetic energy variance dependence on inertia, friction parameters; deduced fissility parameter, nonequilibrium fission roles. Fokker-Planck equation.
1983AD04 Yad.Fiz. 37, 1113 (1983) Dynamical Description of Variances in Kinetic Energy of Fission Fragments NUCLEAR STRUCTURE 236U; analyzed fission fragment energy distribution; deduced nonequilibrium effects in fission. Dynamical variances description.
Back to query form Note: The following list of authors and aliases matches the search parameter I.Gontchar: , I.I.GONCHAR, I.I.GONTCHAR |