NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = Y.Aritomo Found 57 matches. 2024AM03 Phys.Rev. C 109, 034603 (2024) Effects of neck and nuclear orientations on the mass drift in heavy ion collisions
doi: 10.1103/PhysRevC.109.034603
2023AM04 Phys.Rev. C 108, 014612 (2023) Dynamical mechanism of fusion hindrance in heavy ion collisions NUCLEAR REACTIONS 208Pb(48Ca, X), E(cm)=180 MeV; calculated fusion probabilities in collision process, one-dimensional fusion barrier dependence on initial angular momentum, mass distribution of fission fragments, trajectory distribution and time evolution. Investigated fusion hindrance caused by the formation of the neck. Concluded that the fusion hindrance comes from the formation of the inner barrier due to the early denecking process. Dynamical model based on multidimensional Langevin equations.
doi: 10.1103/PhysRevC.108.014612
2023TA23 Phys.Rev. C 108, 054607 (2023) S.Tanaka, N.Nishimura, F.Minato, Y.Aritomo Postfission properties of uranium isotopes: A hybrid method with Langevin dynamics and the Hauser-Feshbach statistical model
doi: 10.1103/PhysRevC.108.054607
2022AM06 Phys.Rev. C 106, 024610 (2022) Modes of massive nucleon transfer appearing in quasifission processes for collisions of superheavy nuclei NUCLEAR REACTIONS 249Bk(48Ca, X), E(cm)=213.05 MeV; calculated potential energy surfaces, fission fragments total kinetic energy distribution, trajectory distribution and time evolution, distribution of the deformation of fragments at scission point. Revealed existence of two quasifission modes arising from the different neck relaxation modes. Multidimensional dynamical model of nucleus-nucleus collisions based on the Langevin equations.
doi: 10.1103/PhysRevC.106.024610
2022AR04 Phys.Rev. C 105, 034604 (2022) Y.Aritomo, A.Iwamoto, K.Nishio, M.Ohta Fission mechanism inferred from nuclear shape fluctuation by the Langevin equation NUCLEAR STRUCTURE 246,264Fm; calculated friction tensors and their eigenvalues in the ground states, first, and second saddles, Langevin trajectory contours, total kinetic energies (TKE) of fission fragments. 246,248,250,252,254,256,258,260,262,264Fm; calculated mass distribution of fission fragments (FFMD) at excitation energies of E*=7 MeV for the fermium isotopes; deduced trend for FFMD from mass-asymmetric to mass-symmetric distribution towards the heavier Fm isotopes. Langevin equations in the nuclear deformation space. Comparison with available experimental data.
doi: 10.1103/PhysRevC.105.034604
2022TA02 Phys.Rev. C 105, L021602 (2022) S.Tanaka, K.Hirose, K.Nishio, K.R.Kean, H.Makii, R.Orlandi, K.Tsukada, Y.Aritomo Angular momentum transfer in multinucleon transfer channels of 18O +237Np NUCLEAR REACTIONS 237Np(18O, X)236Np/237Np/238Np/239Np/237Pu/238Pu/239Pu/240Pu/239Am/240Am/241Am/242Am, E=162 MeV; measured fission fragments, angular distribution of fission fragments; deduced angular anisotropy, average angular momenta. Beam from JAEA tandem accelerator.
doi: 10.1103/PhysRevC.105.L021602
2020AM05 Bull.Rus.Acad.Sci.Phys. 84, 1034 (2020) S.Amano, Y.Aritomo, Y.Miyamoto, S.Ishizaki, M.Okubayashi Modeling of Nuclear Reactions with Langevin Calculations NUCLEAR REACTIONS 186W(48Ti, X), E(cm)=187.87 MeV. analyzed available data; calculated mass angle distribution and mass distribution, yields.
doi: 10.3103/S1062873820080067
2020AR11 Phys.Atomic Nuclei 83, 545 (2020) Y.Aritomo, S.Amano, M.Okubayashi, B.Yanagi, K.Nishio, M.Ohta Estimation of Synthesizing New Superheavy Elements Using Dynamical Model NUCLEAR REACTIONS 208Pb(70Zn, X)278Cn, 250Pu(48Ca, X)298Fl, E not given; analyzed available data. 298,300,304Fl; deduced survival probabilities using the dynamical and statistical models.
doi: 10.1134/S1063778820040043
2020VE07 Phys.Rev. C 102, 054610 (2020) M.J.Vermeulen, K.Nishio, K.Hirose, K.R.Kean, H.Makii, R.Orlandi, K.Tsukada, I.Tsekhanovich, A.N.Andreyev, S.Ishizaki, M.Okubayashi, S.Tanaka, Y.Aritomo Measurement of fission-fragment mass distributions in the multinucleon transfer channels of the 18O + 237Np reaction NUCLEAR REACTIONS 237Np(18O, X)234U*/235U*/236U*/237U*/236Np*/237Np*/238Np*/239Np*/238Pu*/239Pu*/240Pu*/241Pu*/240Am*/241Am*/242Am*/243Am*/242Cm*/243Cm*/244Cm*/245Cm*/244Bk*/245Bk*/246Bk*, E=162.0 MeV from tandem accelerator facility of Japan Atomic Energy Agency (JAEA); measured fission fragments from the fission of reaction products U(A=234-237), Np(A=236-239), Pu(A=238-241), Am(A=240-243), Cm(A=242-244) and Bk(A=244-246) using ΔE-E silicon telescope to detect ejectiles, and four multiwire proportional counters, to detect fission fragments (FFs); deduced yields of fission fragments as a function of their mass and total excitation energy for each multi-nucleon transfer (MNT) channel, fission-fragment mass distributions as function of excitation energy of 7-70 MeV, most probable total excitation energy for each channel, light-fragment and heavy-fragment mass distributions. Comparison with Langevin theoretical calculations including the multichance fission (MCF) process of fission after neutron evaporation.
doi: 10.1103/PhysRevC.102.054610
2019MI06 Phys.Rev. C 99, 051601 (2019) Y.Miyamoto, Y.Aritomo, S.Tanaka, K.Hirose, K.Nishio Origin of the dramatic change of fission mode in fermium isotopes investigated using Langevin equations RADIOACTIVITY 250,252,254,256,258,260Fm(SF); calculated mass distributions, total kinetic energy (TKE) distributions, potential energy on the elongation-mass asymmetry plane, potential energy contours, and fission modes of fission fragments at low-excitation energies using Langevin equations of three-dimensional nuclear-shape parametrization. 237,238,239,240U, 239,240,241,242Np, 241,242,243Pu, 247,248,249,250Cm, 249,250,251,252Bk, 251,252,253,254Cf(SF); calculated fission-fragment mass distributions in the excitation-energy range of 10-20 MeV for four neck parameters using Langevin equations. Comparison with experimental data.
doi: 10.1103/PhysRevC.99.051601
2019TA21 Phys.Rev. C 100, 064605 (2019) S.Tanaka, Y.Aritomo, Y.Miyamoto, K.Hirose, K.Nishio Effects of multichance fission on isotope dependence of fission fragment mass distributions at high energies NUCLEAR REACTIONS 238U(18O, X)237U/238U/239U/240U/239Np/240Np/241Np/242Np/242Pu/243Pu/244Pu, E*=15, 25, 35, 45, 55 MeV; 237Np(18O, X)234U/235U/236U/236Np/237Np/238Np/238Pu/239Pu/240Pu/241Pu, E*=15, 25, 35, 45, 55 MeV; calculated fission fragment mass distributions (FFMD), fraction or probability of each fission chance using Langevin approach, and statistical model code GEF, including multichance fission (MCF). Comparison with experimental data from JAEA Tokai tandem facility. 234,235,236,237,238,239,240U, 236,237,238,239,240,241,242Np, 238,239,240,241,242,243,244Pu; calculated S(2n), fission barriers, mean number of neutron emission before fission using the GEF code.
doi: 10.1103/PhysRevC.100.064605
2017HI10 Phys.Rev.Lett. 119, 222501 (2017) K.Hirose, K.Nishio, S.Tanaka, R.Leguillon, H.Makii, I.Nishinaka, R.Orlandi, K.Tsukada, J.Smallcombe, M.J.Vermeulen, S.Chiba, Y.Aritomo, T.Ohtsuki, K.Nakano, S.Araki, Y.Watanabe, R.Tatsuzawa, N.Takaki, N.Tamura, S.Goto, I.Tsekhanovich, A.N.Andreyev Role of Multichance Fission in the Description of Fission-Fragment Mass Distributions at High Energies NUCLEAR REACTIONS 238U(18O, X)237U/238U/239U/240U/240Np/241Np/242Np/241Pu/242Pu/243Pu/244Pu, E=157.5 MeV; measured reaction products; deduced fragment yields.
doi: 10.1103/PhysRevLett.119.222501
2016LE13 Phys.Lett. B 761, 125 (2016) R.Leguillon, K.Nishio, K.Hirose, H.Makii, I.Nishinaka, R.Orlandi, K.Tsukada, J.Smallcombe, S.Chiba, Y.Aritomo, T.Ohtsuki, R.Tatsuzawa, N.Takaki, N.Tamura, S.Goto, I.Tsekhanovich, C.M.Petrache, A.N.Andreyev Fission fragments mass distributions of nuclei populated by the multinucleon transfer channels of the 18O + 232Th reaction NUCLEAR REACTIONS 232Th(18O, X)231Th/232Th/233Th/234Th/232Pa/233Pa/234Pa/235Pa/236Pa/234U/235U/236U/237U/238U, E=157 MeV; measured fission fragments; deduced fission yields.
doi: 10.1016/j.physletb.2016.08.010
2014AR12 Phys.Rev. C 90, 054609 (2014) Fission dynamics at low excitation energy NUCLEAR REACTIONS 236U(n, F) at E*=20 MeV; calculated potential energy as function of deformation, mass distribution of fission fragments, trajectories of the fission process, nuclear shapes around the scission point, distribution of fission events as function of deformation at the scission point, total kinetic energy distribution (TKE) of fission events as function of deformation parameter. Fluctuation-dissipation model using Langevin equations for dynamics of fission process, within the two-center shell-model parameterization (TCSMP) and the shape characterized by five deformation parameters.
doi: 10.1103/PhysRevC.90.054609
2014CH38 Nucl.Data Sheets 119, 229 (2014) S.Chiba, K.Nishio, H.Makii, Y.Aritomo, I.Nishinaka, T.Ishii, K.Tsukada, M.Asai, K.Furutaka, S.Hashimoto, H.Koura, K.Ogata, T.Ohtsuki, T.Nagayama Surrogate Reactions Research at JAEA/Tokyo Tech NUCLEAR REACTIONS 235,238U(18O, F), E not given; measured reaction products; deduced fission fragment mass yields. 238U(18O, 16O), E not given; measured ejectiles, fission fragments; deduced fission fragment mass distribution, yields vs E*, unnormalized fission probability; calculated fission fragment mass distribution using multidimensional Langevin method. 239U(n, F), E=0.5-20 MeV; measured fission fragments; deduced fission σ vs neutron energy. 155Gd(18O, 16O), E not given; measured reaction products. 156Gd(n, γ), E=0.5-3.5 MeV; deduced σ using SRM (surrogate ratio method). Compared with ENDF/B/VII.1.
doi: 10.1016/j.nds.2014.08.063
2014IV06 Phys.Rev. C 90, 054607 (2014) F.A.Ivanyuk, S.Chiba, Y.Aritomo Scission-point configuration within the two-center shell model shape parameterization NUCLEAR REACTIONS 236U(n, F), E=thermal; calculated total deformation energy, shell component of scission point deformation energy, total energy (liquid drop plus shell correction) at the scission point, deformation energy before and after scission as function of elongation and heavy fragment mass number, mass distribution of fission fragments, excitation energy available for prompt neutron emission. 233Th, 236U, 240Pu, 246Cm(n, F), E=thermal; calculated total kinetic energies (TKEs), total excitation energies during the neck rupture. 232Th, 233,235,238U, 237Np, 239,240,241Pu, 241,243Am, 245Cm(n, F), E not given; calculated total neutron multiplicity. Optimal shape descriptions for fissioning systems. Two-center shell model parameterization for scission-point configuration. Comparison with experimental data.
doi: 10.1103/PhysRevC.90.054607
2014NI16 Nucl.Data Sheets 119, 299 (2014) K.Nishio, H.Ikezoe, S.Hofmann, D.Ackermann, Y.Aritomo, V.F.Comas, Ch.E.Dullmann, S.Heinz, J.A.Heredia, F.P.Hessberger, K.Hirose, J.Khuyagbaatar, B.Kindler, I.Kojouharov, B.Lommel, M.Makii, R.Mann, S.Mitsuoka, I.Nishinaka, T.Ohtsuki, S.Saro, M.Schadel, A.G.Popeko, A.Turler, Y.Wakabayashi, Y.Watanabe, A.Yakushev, A.Yeremin Study of Heavy-ion Induced Fission for Heavy Element Synthesis NUCLEAR REACTIONS 238U(30Si, F), (34S, F), E*=30-68 MeV;238U(36S, F), E(cm)=140-180 MeV; measured reaction products; calculated σ; deduced σ. 238U(30Si, xn), E(cm)=125-160 MeV;238U(34S, xn), E(cm)=140-180 MeV; measured reaction products; deduced σ; calculated σ.
doi: 10.1016/j.nds.2014.08.082
2013AR07 Phys.Rev. C 88, 044614 (2013) Fission process of nuclei at low excitation energies with a Langevin approach RADIOACTIVITY 234U, 236U, 240Pu(SF); calculated potential energy surfaces, mass distribution of fission fragments (MDFF) for kinetic energy of 20 MeV for the fissioning nucleus. Dynamical model based on the fluctuation-dissipation theorem using Langevin equations. Comparison with experimental data. NUCLEAR REACTIONS 236U(d, F), E=16.3, 20, 30, 40 MeV; calculated mass distribution of fission fragments (MDFF). Dynamical model based on the fluctuation-dissipation theorem using Langevin equations. Comparison with experimental data.
doi: 10.1103/PhysRevC.88.044614
2012AR02 Phys.Rev. C 85, 044614 (2012) Y.Aritomo, K.Hagino, K.Nishio, S.Chiba Dynamical approach to heavy-ion induced fission using actinide target nuclei at energies around the Coulomb barrier NUCLEAR REACTIONS 238U(34S, X), (36S, X), (30Si, X), E(cm)=130-180 MeV; analyzed experimental data for σ(E) and fission fragment mass distribution in heavy-ion induced fission. 238U(36S, X)274Hs*, E*=39.5 MeV; 238U(30Si, X)268Sg*, E*=35.5 MeV; calculated potential energy surfaces and nuclear shapes near scission point, probability distribution contour maps, time evolution of the probability distribution, Langevin trajectories. Coupled Channel calculations and a fluctuation-dissipation model for fusion-fission, quasifission and deep quasifission processes.
doi: 10.1103/PhysRevC.85.044614
2012NI12 Phys.Rev. C 86, 034608 (2012) K.Nishio, S.Mitsuoka, I.Nishinaka, H.Makii, Y.Wakabayashi, H.Ikezoe, K.Hirose, T.Ohtsuki, Y.Aritomo, S.Hofmann Fusion probabilities in the reactions 40, 48Ca+238U at energies around the Coulomb barrier NUCLEAR REACTIONS 238U(40Ca, X), (48Ca, X), E(cm)=180-248 MeV; measured fission fragment spectra, (fragment)(fragment)-coin, σ(θ), full momentum transfer fission σ, fission fragment σ and mass distribution, total kinetic energy (TKE); deduced fusion probabilities. Comparison with calculations using fluctuation-dissipation model using Langevin equations. Comparison with previous experimental studies.
doi: 10.1103/PhysRevC.86.034608
2011AR11 Phys.Rev. C 84, 024602 (2011) Dynamical model of surrogate reactions NUCLEAR REACTIONS 236,238U(18O, 16O)238U/240U, E(cm)=133.5 MeV; calculated potential energy surfaces for 240U and 256Fm, spin distributions, fragment mass distributions. Dynamical model of surrogate reactions employing Multidimensional Langevin equations. Comparison with experimental data.
doi: 10.1103/PhysRevC.84.024602
2011CH55 Phys.Rev. C 84, 054602 (2011) Spin-dependent observables in surrogate reactions NUCLEAR REACTIONS 237,239U(n, γ)238U*/240U*, E=0-5 MeV; calculated spectra of evaporated neutrons, multiplicity of γ rays, spectra of cascading γ rays, fission fragment mass distribution as function of the spin of the compound nucleus. Hauser-Feshbach theory , and Fluctuation-dissipation theorem. Surrogate ratio methods.
doi: 10.1103/PhysRevC.84.054602
2010NI14 Phys.Rev. C 82, 024611 (2010) K.Nishio, S.Hofmann, F.P.Hessberger, D.Ackermann, S.Antalic, Y.Aritomo, V.F.Comas, Ch.E.Dullmann, A.Gorshkov, R.Graeger, K.Hagino, S.Heinz, J.A.Heredia, K.Hirose, H.Ikezoe, J.Khuyagbaatar, B.Kindler, I.Kojouharov, B.Lommel, R.Mann, S.Mitsuoka, Y.Nagame, I.Nishinaka, T.Ohtsuki, A.G.Popeko, S.Saro, M.Schadel, A.Turler, Y.Watanabe, A.Yakushev, A.V.Yeremin Nuclear orientation in the reaction 34S+238U and synthesis of the new isotope 268Hs NUCLEAR REACTIONS 238U(34S, xn)267Hs/268Hs, E=148-170 MeV; measured evaporation residues and Eα, Eγ, x-rays, (fragment)α-, (fragment)γ-coin, production σ, fission σ(E), mass distribution of fission fragments as a function of energy. Comparison of fission σ(E) with calculations based on the three-dimensional Langevin equation and deformed target nuclei. Coupled-channel calculations for mass distributions. 268,269Sg, 272,273Hs, 269,271,272Mt, 274,275,276,277Sg, 273,275,276Rg, 278,279,280,281Cn; theoretical estimates of production rates in 243Am, 244Pu, 248Cm(34S, xn), (36S, xn) reactions. RADIOACTIVITY 267,268Hs(α)[from 238U(34S, X), E=163.0 MeV]; 263Sg, 259Rf(α); 264Sg(SF); measured Eα, Eγ, x-rays, (fragment)α-, (fragment)γ-coin, half-lives; deduced Qα. Systematics of Qα values for even-even Z=104-114 and N=150-170 nuclei.
doi: 10.1103/PhysRevC.82.024611
2010NI18 Phys.Rev. C 82, 044604 (2010) K.Nishio, H.Ikezoe, I.Nishinaka, S.Mitsuoka, K.Hirose, T.Ohtsuki, Y.Watanabe, Y.Aritomo, S.Hofmann Evidence for quasifission in the sub-barrier reaction of 30Si+238U NUCLEAR REACTIONS 238U(30Si, X), E=140.8, 145.3, 150.9, 156.5, 162.2, 167.8, 173.4, 179.0, 190.3 MeV; measured distribution for folding angle of fission fragments, σ for the full momentum transfer (FMT) fission, σ for evaporation residues of 263,264,265Sg, A=50-250 fragment mass distributions for full momentum transfer (FMT) fissions. Comparison with Langevin equation model and statistical model calculations.
doi: 10.1103/PhysRevC.82.044604
2009AR17 Int.J.Mod.Phys. E18, 2145 (2009) Fusion-Fission dynamics in superheavy mass region
doi: 10.1142/S0218301309014457
2009AR18 Phys.Rev. C 80, 064604 (2009) Analysis of dynamical processes using the mass distribution of fission fragments in heavy-ion reactions NUCLEAR REACTIONS 238U(36Si, X), E(cm)=154.0, 166.0, 176.0 MeV; 238U(30Si, X), E(cm)=129.0, 134.0, 144.0 MeV; analyzed mass distributions of fission fragments, σ, and adiabatic potential energy surfaces using the dynamic model and the Langevin equation.
doi: 10.1103/PhysRevC.80.064604
2007AR05 Phys.Rev. C 75, 024602 (2007) Possibility of synthesizing a doubly magic superheavy nucleus NUCLEAR REACTIONS 152La(152La, X), 232Th(72Cr, X), 244Pu(60Ca, X), 258Fm(46Si, X), E* ≈ 10-80 MeV; calculated fusion probabilities, evaporation residue σ. 298,300,304Fl; calculated compound nucleus survival probabilities. Fluctuation-dissipation dynamics.
doi: 10.1103/PhysRevC.75.024602
2007ZA12 Physics of Part.and Nuclei 38, 469 (2007) V.Zagrebaev, A.Karpov, Y.Aritomo, M.Naumenko, W.Greiner Potential energy of a heavy nuclear system in fusion-fission processes
doi: 10.1134/S106377960704003X
2006AR03 Nucl.Phys. A764, 149 (2006) Origin of the drastic decrease of fusion probability in superheavy mass region NUCLEAR STRUCTURE 224Th, 232Pu, 240Cf, 256No, 267Sg, 280Ds, 292Fl, 297Og; calculated potential energy surface. Fluctuation-dissipation model. NUCLEAR REACTIONS 208Pb(Ar, X), (Ca, X), (Ti, X), (Cr, X), (Fe, X), (Ni, X), (Zn, X), E not given; calculated fusion probability; deduced fusion-fission dynamics features. Fluctuation-dissipation model, comparison with data.
doi: 10.1016/j.nuclphysa.2005.09.008
2006AR19 J.Phys.(London) G32, 2245 (2006) Pre-scission neutron multiplicity associated with the dynamical process in the superheavy-mass region NUCLEAR REACTIONS 208Pb, 244Pu(48Ca, F), E*=50 MeV; calculated prescission neutron multiplicities, fission fragment mass distributions. Fluctuation-dissipation dynamics.
doi: 10.1088/0954-3899/32/11/016
2006AR21 Nucl.Phys. A780, 222 (2006) Fusion hindrance and roles of shell effects in superheavy mass region NUCLEAR STRUCTURE 276,284,292Fl; calculated potential energy surfaces, shell correction energy. NUCLEAR REACTIONS 208Pb(76Ge, X), E*=10-70 MeV; 244Pu(48Ca, X), E*=35-70 MeV; calculated fusion probability, fission fragment mass distributions, role of shell correction energy.
doi: 10.1016/j.nuclphysa.2006.09.018
2006NA06 Int.J.Mod.Phys. E15, 311 (2006) A.K.Nasirov, Y.Aritomo, A.Fukushima, M.Ohta, T.Wada, G.Giardina, G.Mandaglio, A.Muminov, R.K.Utamuratov Role of the nuclear shell structure and orientation angles of deformed reactants in complete fusion NUCLEAR REACTIONS 238U(16O, X), E=80-160 MeV; 154Sm(60Ni, X), E=240-330 MeV; calculated fusion and evaporation residue σ; deduced shell structure and orientation effects. Dinuclear system concept, Langevin calculations, comparison with data.
doi: 10.1142/S0218301306004144
2005AR08 Nucl.Phys. A753, 152 (2005) Trajectory analysis for fusion path in superheavy-mass region NUCLEAR REACTIONS 208Pb, 244Pu(48Ca, X), E*=40, 50, 60 MeV; calculated fusion-fission trajectory in deformation space, time evolution features. 244Pu(48Ca, X), E*=40, 50, 60 MeV; calculated fission fragment mass distributions. Fluctuation-dissipation model.
doi: 10.1016/j.nuclphysa.2005.02.122
2005AR22 Nucl.Phys. A759, 309 (2005) Y.Aritomo, M.Ohta, T.Materna, F.Hanappe, O.Dorvaux, L.Stuttge Analysis of fusion-fission dynamics by pre-scission neutron emission in 58Ni + 208Pb system NUCLEAR REACTIONS 208Pb(58Ni, X), E*=185.9 MeV; analyzed pre-scission neutron multiplicity and fusion-fission trajectory in deformation space. Fluctuation-dissipation model.
doi: 10.1016/j.nuclphysa.2005.05.155
2005NA29 Nucl.Phys. A759, 342 (2005) A.Nasirov, A.Fukushima, Y.Toyoshima, Y.Aritomo, A.Muminov, S.Kalandarov, R.Utamuratov The role of orientation of nucleus symmetry axis in fusion dynamics NUCLEAR REACTIONS 238U(16O, X), E=80-160 MeV; 154Sm(60Ni, X), E=250-320 MeV; calculated capture, quasi-fission and fusion σ, entrance channel effects.Dinuclear system model analysis.
doi: 10.1016/j.nuclphysa.2005.05.152
2004AR06 Int.J.Mod.Phys. E13, 301 (2004) Y.Aritomo, M.Ohta, T.Materna, F.Hanappe, L.Stuttge Dynamical calculation for fusion-fission process in superheavy mass region NUCLEAR REACTIONS 208Pb(58Ni, X), E*=189.5 MeV; calculated pre-scission neutron multiplicities, quasi-fission and fusion-fission components.
doi: 10.1142/S0218301304002089
2004AR10 Nucl.Phys. A734, 180 (2004) Y.Aritomo, M.Ohta, T.Materna, F.Hanappe, L.Stuttge Dynamics of fusion-fission process with neutron evaporation in superheavy mass region NUCLEAR REACTIONS 208Pb(58Ni, X), E*=186 MeV; calculated pre-scission neutron multiplicity, fission trajectory features.
doi: 10.1016/j.nuclphysa.2004.01.029
2004AR16 Nucl.Phys. A738, 221 (2004) Y.Aritomo, M.Ohta, T.Materna, F.Hanappe, L.Stuttge Analysis of fusion-fission dynamics in superheavy mass region by pre-scission neutron multiplicities NUCLEAR STRUCTURE 292Fl; calculated potential energy surface; deduced decay paths. Fluctuation-dissipation model. NUCLEAR REACTIONS 208Pb(58Ni, X), E*=189.5 MeV; 208Pb, 244Pu(48Ca, X), E*=40 MeV; analyzed pre-scission neutron multiplicities, fission fragment mass distributions; deduced fusion-fission dynamics features. Fluctuation-dissipation model.
doi: 10.1016/j.nuclphysa.2004.04.035
2004AR20 Prog.Theor.Phys.(Kyoto), Suppl. 154, 449 (2004) Y.Aritomo, M.Ohta, T.Materna, F.Hanappe, L.Stuttge Problems of Dynamical Calculation for Synthesis of Superheavy Elements NUCLEAR REACTIONS 208Pb, 244Pu(48Ca, X), E* ≈ 35 MeV; calculated potential energy surfaces, fusion-fission σ, fission fragment mass distributions, pre-scission neutron multiplicities. Dynamical approach, sensitivity to parameters discussed.
doi: 10.1143/PTPS.154.449
2004AR24 Acta Phys.Hung.N.S. 19, 85 (2004) Analysis of Fusion-Fission Process with Neutron Evaporation in Superheavy Mass Region
doi: 10.1556/APH.19.2004.1-2.12
2004AR25 Nucl.Phys. A744, 3 (2004) Dynamical calculation for fusion-fission probability in superheavy mass region, where mass symmetric fission events originate NUCLEAR REACTIONS 208Pb, 244Pu(48Ca, X), E* ≈ 25-50 MeV; calculated potential energy surfaces, fusion-fission σ, fission fragment mass distributions; deduced reaction mechanism features. Dynamical approach.
doi: 10.1016/j.nuclphysa.2004.08.009
2004MA16 Int.J.Mod.Phys. E13, 285 (2004) T.Materna, V.Bouchat, V.Kinnard, F.Hanappe, O.Dorvaux, C.Schmitt, L.Stuttge, K.Siwek-Wilczynska, Y.Aritomo, A.Bogatchev, E.Prokhorova, M.Ohta Tracking dissipation in capture reactions NUCLEAR REACTIONS 98Mo(28Si, X), E=204 MeV; 208Pb(58Ni, X), E*=186 MeV; 232Th(40Ca, X), E*=166 MeV; calculated pre- and post-scission neutron multiplicities, dissipation effects. Backtracing technique.
doi: 10.1142/S0218301304002065
2004MA30 Nucl.Phys. A734, 184 (2004) T.Materna, Y.Aritomo, N.Amar, A.Bogatchev, V.Bouchat, O.Dorvaux, G.Giardina, S.Grevy, F.Hanappe, I.Itkis, M.Itkis, M.Jandel, G.Kniajeva, J.Kliman, E.Kozulin, N.Kondratiev, L.Krupa, J.Peter, E.Prokhorova, I.Pokrovsky, C.Schmitt, L.Stuttge, V.Voskresensky Capture and dissipation in the superheavy region NUCLEAR REACTIONS 208Pb(48Ca, X), E=240 MeV; 244Pu(48Ca, X), E=244 MeV; measured pre-scission neutron multiplicity distributions. Backtracing analysis.
doi: 10.1016/j.nuclphysa.2004.01.030
2004MA69 Prog.Theor.Phys.(Kyoto), Suppl. 154, 442 (2004) T.Materna, F.Hanappe, Y.Aritomo, L.Stuttge, O.Dorvaux, C.Schmitt, M.Ohta Tracking Dissipation in Capture Reactions NUCLEAR REACTIONS 98Mo(28Si, X), E=204 MeV; 232Th(40Ca, X), E*=166 MeV; 208Pb(58Ni, X), E*=186 MeV; analyzed pre- and post-scission neutron multiplicities; deduced dissipation effects. Backtracing procedure.
doi: 10.1143/PTPS.154.442
2004OH12 Acta Phys.Hung.N.S. 19, 61 (2004) M.Ohta, Y.Aritomo, K.Hashizume On Evaporation Residue Cross Sections Producing Nuclei with Z = 104-120
doi: 10.1556/APH.19.2004.1-2.9
2003AR10 Yad.Fiz. 66, 1141 (2003); Phys.Atomic Nuclei 66, 1105 (2003) Analysis of Fusion-Fission Process with Neutron Evaporation in Superheavy Mass Region NUCLEAR REACTIONS 208Pb(48Ca, X), (52Cr, X), (64Ni, X), E*=32-101 MeV; 244Pu(48Ca, X), E*=37 MeV; calculated fission fragment mass distributions, kinetic energies. 244Pu, 249Cf(48Ca, xn), E*=20-50 MeV; calculated σ. 244Pu(48Ca, X), E*=33 MeV; calculated prescission neutron multiplicity. Fluctuation-dissipation dynamics.
doi: 10.1134/1.1586423
2003MA30 Yad.Fiz. 66, 1204 (2003); Phys.Atomic Nuclei 66, 1168 (2003) T.Materna, C.Schmitt, Y.Aritomo, J.Bartel, B.Benoit, A.A.Bogatchev, E.de Goes Brennand, O.Dorvaux, G.Giardina, F.Hanappe, M.G.Itkis, I.M.Itkis, J.Kliman, G.N.Kniajeva, N.A.Kondratiev, E.M.Kozulin, L.Krupa, Yu.Ts.Oganessian, I.V.Pokrovsky, E.V.Prokhorova, N.Rowley, K.Siwek-Wilczynska, L.Stuttge Tracking Dissipation in Capture Reactions NUCLEAR REACTIONS 98Mo(28Si, X), E=204 MeV; 208Pb(58Ni, X), E=232Th(40Ca, X), E=166 MeV; analyzed pre- and post-scission neutron multiplicities, correlations. 209Bi(18O, F), E*=26 MeV; analyzed fission fragment mass distribution. Backtracking analysis method.
doi: 10.1134/1.1586432
2003OH02 Yad.Fiz. 66, 1062 (2003); Phys.Atomic Nuclei 66, 1026 (2003) An Idea for Predicting the Evaporation Residue Cross Section in Superheavy Mass Region NUCLEAR REACTIONS 238U, 244Pu, 243Am, 248Cm, 249Bk, 248,249Cf(18O, xn), (19F, xn), (22Ne, xn), (23Na, xn), (26Mg, xn), (27Al, xn), (30Si, xn), (31P, xn), (34S, xn), (37Cl, xn), (40Ar, xn), (41K, xn), (48Ca, xn), (45Sc, xn), (50Ti, xn), (50V, xn), (54Cr, xn), (55Mn, xn), (58Fe, xn), E* ≈ 35 MeV; 248,249,250,251,252Cf(48Ca, xn), E* ≈ 30 MeV; calculated evaporation residue formation σ. Phenomenological approach, comparisons with data.
doi: 10.1134/1.1586414
2002AR24 Prog.Theor.Phys.(Kyoto), Suppl. 146, 503 (2002) Fusion-Fission Process of Superheavy Elements with Fluctuation-Dissipation Model NUCLEAR REACTIONS 244Pu, 248Cm(48Ca, X), E* ≈ 20-50 MeV; calculated fusion and evaporation residue σ. Fluctuation-dissipation model.
doi: 10.1143/PTPS.146.503
2002AR25 J.Nucl.Radiochem.Sci. 3, No 1, 17 (2002) Fusion Mechanism in Superheavy Mass Region NUCLEAR REACTIONS 244Pu(48Ca, X), E*=25-50 MeV; analyzed fusion σ, fission fragment mass distribution.
2002ZA01 Phys.Rev. C65, 014607 (2002) V.I.Zagrebaev, Y.Aritomo, M.G.Itkis, Yu.Ts.Oganessian, M.Ohta Synthesis of Superheavy Nuclei: How accurately can we describe it and calculate the cross sections ? NUCLEAR REACTIONS 208Pb(16O, xn), E*=14-45 MeV; 236U(12C, xn), E*=26-65 MeV; 172Yb, 206,208Pb, 244Pu(48Ca, xn), E*=12-60 MeV; 136Xe(86Kr, xn), E*=15-60 MeV; 124Sn(92Zr, xn), (96Zr, xn), E*=10-60 MeV; calculated, analyzed fusion and evaporation residue σ. Implications for synthesis of superheavy elements discussed.
doi: 10.1103/PhysRevC.65.014607
1999AR04 Phys.Rev. C59, 796 (1999) Y.Aritomo, T.Wada, M.Ohta, Y.Abe Fluctuation-Dissipation Model for Synthesis of Superheavy Elements NUCLEAR STRUCTURE 268No, 276Rf, 282Sg, 286Hs, 292Ds, 294Cn, 298Fl, 302Lv; calculated fission potential energy curves, evaporation residue cross sections vs excitation energy, fission barrier height. Fluctuation-dissipation model.
doi: 10.1103/PhysRevC.59.796
1999OH10 Acta Phys.Hung.N.S. 10, 253 (1999) M.Ohta, K.Okazaki, T.Wada, Y.Aritomo, Y.Abe Favorable Combination for the Synthesis of Superheavy Elements NUCLEAR REACTIONS 223At(75Cu, X), 231Ra(67Fe, X), 238Pa(60V, X), 246Pu(52Ca, X), 253Bk(45Cl, X), 217At(73Cu, X), 224Ra(66Fe, X), 232Pa(58V, X), 239Pu(51Ca, X), 247Bk(43Cl, X), E*=25-50 MeV; calculated compound nucleus formation probability, evaporation residue σ.
1999WA28 Nucl.Phys. (Supplement) A654, 888c (1999) T.Wada, Y.Aritomo, T.Tokuda, K.Okazaki, M.Ohta, Y.Abe Multi-Dimensional Fluctuation-Dissipation Dynamics of the Synthesis of Superheavy Elements NUCLEAR REACTIONS 149La(149La, X), E*=10-50 MeV; calculated evaporation residue excitation function. Fluctuation-dissipation dynamics, mass asymmetric channels also discussed.
doi: 10.1016/S0375-9474(00)88566-8
1997AB38 J.Phys.(London) G23, 1275 (1997) Y.Abe, Y.Aritomo, T.Wada, M.Ohta A New Mechanism for Synthesis of Superheavy Elements NUCLEAR STRUCTURE 298Fl; calculated potential vs collective degree of freedom, time, shell-correction energy vs temperature, other superheavy residue production related features.
doi: 10.1088/0954-3899/23/10/015
1997AR06 Phys.Rev. C55, R1011 (1997) Y.Aritomo, T.Wada, M.Ohta, Y.Abe Diffusion Mechanism for Synthesis of Superheavy Elements NUCLEAR REACTIONS 149La(149La, X), E not given; calculated evaporation residue σ vs excitation. Smoluchowski equation, finite-range droplet model potential; temperature dependent shell correction energy, superheavy elements.
doi: 10.1103/PhysRevC.55.R1011
1997WA08 Nucl.Phys. A616, 446c (1997) T.Wada, Y.Aritomo, T.Tokuda, M.Ohta, Y.Abe Dynamics of the Superheavy Element Synthesis with a Diffusion Model NUCLEAR REACTIONS 145La(145La, X), 147La(147La, X), 148La(148La, X), 149La(149La, X), E not given; calculated evaporation residue σ vs initial excitation energy for 290114, 294114, 296114, 298114 compound nuclei, formation, survival probabilities; deduced isotope dependence, superheavy element synthesis dynamics related features. Diffusion model.
doi: 10.1016/S0375-9474(97)00116-4
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