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NSR database version of May 24, 2024.

Search: Author = T.Ichikawa

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2023YA22      Phys.Rev. C 108, L011304 (2023)

Y.Yamaguchi, W.Horiuchi, T.Ichikawa, N.Itagaki

Dineutron-dineutron correlation in 8He

NUCLEAR STRUCTURE 8He; calculated potential energy surface of Jπ=0+ for the α+2n+2n configuration, energy convergence of lowest Jπ=0+ state, point-matter one body density distribution, neutron and proton one body density distributions of 8He, rms point-proton and matter radii, ground state energy, squared overlap between the ground state of 8He and 4He+2n+2n cluster configuration, quadrupole deformation parameter of 4He+2n+2n cluster configuration. Microscopic 4He+4n model, with antisymmetrized wave function and basis states constructed with different neutron configurations and superposed using the generator coordinate method (GCM). Comparison to available experimental data.

NUCLEAR REACTIONS 8He(p, p), E=680 MeV; calculated proton-nucleus elastic σ(θ). C(8He, X), E=790/MeV nucleon; calculated total σ. Calculation based on Glauber model with 4He+4n wave function. Comparison with available experimental data.

doi: 10.1103/PhysRevC.108.L011304
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2022IC01      Phys.Rev. C 105, 024314 (2022)

T.Ichikawa, N.Itagaki

Optimization of basis functions for multiconfiguration mixing using the replica exchange Monte Carlo method and its application to 12C

NUCLEAR STRUCTURE 12C; calculated levels, J, π, potential-energy surface on the β-γ plane, temperature dependence of the calculated energies forthe 0+ excited states, rms radii. Monte Carlo method to sample Slater determinants. Comparison to experimental data.

doi: 10.1103/PhysRevC.105.024314
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2020AR01      Phys.Scr. 95, 24003 (2020)

K.-i.Arita, T.Ichikawa, K.Matsuyanagi

Semiclassical origin of asymmetric nuclear fission: nascent-fragment shell effect in periodic-orbit theory

NUCLEAR REACTIONS 236U(n, F), E not given; analyzed available data; deduced shell structures in fission processes with the 3QS cavity model.

doi: 10.1088/1402-4896/ab42a8
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2019IC01      Phys.Lett. B 789, 679 (2019)

T.Ichikawa, P.Moller

The microscopic mechanism behind the fission-barrier asymmetry (II): The rare-earth region 50 < Z < 82 and 82 < N < 126

NUCLEAR STRUCTURE 132Sn, 240Pu, 186Pt, 236U, 180Hg; calculated potential energy surfaces, single-neutron energy levels; deduced a new type of asymmetric fission but of analogous origin as the asymmetry of actinide fission, mechanism of the saddle asymmetry in the sub-Pb region.

doi: 10.1016/j.physletb.2018.12.034
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2018AR09      Phys.Rev. C 98, 064311 (2018)

K.Arita, T.Ichikawa, K.Matsuyanagi

Nascent fragment shell effects on the nuclear fission processes in semiclassical periodic orbit theory

doi: 10.1103/PhysRevC.98.064311
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2017HA16      Phys.Rev. C 95, 054620 (2017)

K.Hagino, T.Ichikawa

New and efficient method for solving the eigenvalue problem for the two-center shell model with finite-depth potentials

NUCLEAR STRUCTURE 16O; calculated neutron single-particle energies for 16O+16O system as function of separation distance between the two nuclei, single-particle energy for the second positive-parity state with 1/2+ as function of the number of one-center and two-center harmonic oscillator bases states. Proposed method to solve the eigenvalue problem for a single-particle motion in a two-center potential, combining separable representation for single-particle potential with matrix diagonalization.

doi: 10.1103/PhysRevC.95.054620
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2017MA34      Prog.Theor.Exp.Phys. 2017, 063D01 (2017)

H.Matsuno, N.Itagaki, T.Ichikawa, Y.Yoshida, Y.Kanada-Enyo

Effect of 12C + α clustering on the E0 transition in 16O

NUCLEAR STRUCTURE 16O; analyzed available data; deduced the mixing effect of 3α and α breaking components in the 12C cluster on the E0 transitions.

doi: 10.1093/ptep/ptx065
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2016MO08      At.Data Nucl.Data Tables 109-110, 1 (2016)

P.Moller, A.J.Sierk, T.Ichikawa, H.Sagawa

Nuclear ground-state masses and deformations: FRDM(2012)

NUCLEAR STRUCTURE A=16-339; calculated ground-state deformation parameters, β-decay Q-values, T1/2 and delayed neutron emission probabilities, neutron- and proton-separation energies, J, α-decay Q-value and T1/2, atomic masses. Comparison with available data.

doi: 10.1016/j.adt.2015.10.002
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2016SH09      Phys.Lett. B 755, 332 (2016)

A.Shrivastava, K.Mahata, S.K.Pandit, V.Nanal, T.Ichikawa, K.Hagino, A.Navin, C.S.Palshetkar, V.V.Parkar, K.Ramachandran, P.C.Rout, A.Kumar, A.Chatterjee, S.Kailas

Evolution of fusion hindrance for asymmetric systems at deep sub-barrier energies

NUCLEAR REACTIONS 198Pt(7Li, X), E=20-35 MeV;198Pt(12C, X), E=50-64 MeV; measured reaction products, Eγ, Iγ, X-rays; deduced fusion σ. Comparison with coupled-channels calculations using the code CCFULL.

doi: 10.1016/j.physletb.2016.02.029
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6266.

2015IC02      Phys.Rev. C 92, 021602 (2015)

T.Ichikawa, K.Matsuyanagi

Universal damping mechanism of quantum vibrations in deep sub-barrier fusion reactions

NUCLEAR REACTIONS 208Pb(16O, X), E near the touching point; calculated Nilsson diagram as a function of neutron or proton radius, B(E3), energy-weighted sums of B(E3), density distributions of the p1/2 and d5/2 states. 16O, 208Pb; deduced damping of quantum octupole vibrations. Random-phase approximation method applied to the heavy-mass asymmetric dinuclear system.

doi: 10.1103/PhysRevC.92.021602
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2015IC03      Phys.Rev. C 92, 064604 (2015)


Systematic investigations of deep sub-barrier fusion reactions using an adiabatic approach

NUCLEAR REACTIONS 64Ni(64Ni, X), E(cm)=83-110 MeV; 58Ni(58Ni, X), E(cm)=90-110 MeV; 58Ni(54Fe, X), E(cm)=83-110 MeV; 40Ca(40Ca, X), E(cm)=47-66 MeV; 48Ca(48Ca, X), E(cm)=44-62 MeV; 30Si(24Mg, X), E(cm)=18-30 MeV; 96Zr(48Ca, X), E(cm)=84-113 MeV; 208Pb(16O, X), E(cm)=63-85 MeV; calculated fusion σ(E), astrophysical S(E) factor, logarithmic derivative of fusion σ(E), barrier distributions as function of incident energy, average angular momentum of compound nucleus versus incident energies, partial fusion cross section versus angular momentum, radius and diffuseness parameters at extremely low incident beam energies. Extension of the standard coupled-channel (CC) model by introducing a damping factor in the coupling matrix elements, and using Yukawa-plus-exponential (YPE) heavy ion-ion potential. Comparison to experimental data.

doi: 10.1103/PhysRevC.92.064604
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2015IW01      Phys.Rev. C 92, 011303 (2015)

Y.Iwata, T.Ichikawa, N.Itagaki, J.A.Maruhn, T.Otsuka

Examination of the stability of a rod-shaped structure in 24Mg

NUCLEAR STRUCTURE 24Mg; calculated density profiles of the initial states of six-α clusters, contours of final states of compact shape, rod shape, and fragmentation, comparison of energies with and without the spin-orbit interaction as a function of rotational frequency; deduced rod-shaped structure of 24Mg with large angular momentum as a metastable stationary state. Cranked Hartree-Fock calculation with several different Skyrme-type interactions.

doi: 10.1103/PhysRevC.92.011303
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2015MO03      Phys.Rev. C 91, 024310 (2015)

P.Moller, A.J.Sierk, T.Ichikawa, A.Iwamoto, M.Mumpower

Fission barriers at the end of the chart of the nuclides

NUCLEAR STRUCTURE Z=60-130, N=90-230, A=171-330; calculated fission-barrier heights, saddle-point energies for 5239 nuclei between the proton and neutron drip lines. 171Nd; calculated shape at saddle point. 298Hs; calculated potential energy surface contour in (ϵ2, γ) plane. Macroscopic-microscopic finite-range liquid-drop model with a 2002 set of macroscopic-model parameters.

doi: 10.1103/PhysRevC.91.024310
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2015MO27      Eur.Phys.J. A 51, 173 (2015)

P.Moller, T.Ichikawa

A method to calculate fission-fragment yields Y(Z, N) versus proton and neutron number in the Brownian shape-motion model - Application to calculations of U and Pu charge yields

doi: 10.1140/epja/i2015-15173-1
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2014IC01      Phys.Rev. C 89, 011305 (2014)

T.Ichikawa, K.Matsuyanagi, J.A.Maruhn, N.Itagaki

Pure collective precession motion of a high-spin torus isomer

NUCLEAR STRUCTURE 40Ca; calculated time-evolution of the density distribution, total angular momentum, tilting angle, and rotational angle of precession motion of the high-K torus isomer. Three-dimensional time-dependent Hartree-Fock (TDHF) method, and random-phase approximation (RPA) method for high-spin states.

doi: 10.1103/PhysRevC.89.011305
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2014IC02      Phys.Rev. C 90, 034314 (2014)

T.Ichikawa, K.Matsuyanagi, J.A.Maruhn, N.Itagaki

High-spin torus isomers and their precession motions

NUCLEAR STRUCTURE 36Ar, 40Ca, 44Ti, 48Cr, 52Fe; calculated density distributions, moments of inertia, single-particle energies, time evolution of the precession motion, Nilsson diagrams for high-spin torus isomers. Cranked three-dimensional Hartree-Fock (TDHF) method with Skyrme interactions and radially displaced harmonic-oscillator (RDHO) model.

doi: 10.1103/PhysRevC.90.034314
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2014MO17      Phys.Rev. C 90, 014601 (2014)

P.Moller, J.Randrup, A.Iwamoto, T.Ichikawa

Fission-fragment charge yields: Variation of odd-even staggering with element number, energy, and charge asymmetry

NUCLEAR REACTIONS 234U, 240Pu(n, F), E=thermal; 222,226,228Th, 234U(γ, F), E=11 MeV; analyzed magnitude of the odd-even staggering for fission-fragment charge-yield distributions; deduced total energies, potential energies, and excitation energies from saddle to scission at different locations in the five-dimensional deformation space; correlation of odd-even staggering with excitation energy.

doi: 10.1103/PhysRevC.90.014601
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2013AS02      Phys.Rev. C 87, 014332 (2013)

M.Asai, K.Tsukada, M.Sakama, H.Haba, T.Ichikawa, Y.Ishii, A.Toyoshima, T.Ishii, I.Nishinaka, Y.Nagame, Y.Kasamatsu, M.Shibata, Y.Kojima, H.Hayashi

Ground-state configuration of the N=157 nucleus 259No

RADIOACTIVITY 259No(α)[from 248Cm(18O, 3nα), E=94 MeV]; measured Eα, Iα, Eγ, I(K-x rays), αγ-coin, T1/2 at JAEA facility. 255Fm; deduced levels, J, π, multipolarity, configuration. 259No; deduced ground-state configuration. 255,257,259,261,263,265No; calculated energies of neutron single-particle orbitals, and β2, β4, β6 deformation parameters using macroscopic-microscopic model based on FRLDM and Strutinsky shell correction method. Observed α lines from decays of 211,213,214Po, 211At, 250,254,255,256Fm, 253Es, 257No, 261Rf formed in competing reaction channels.

doi: 10.1103/PhysRevC.87.014332
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Data from this article have been entered in the XUNDL database. For more information, click here.

2013IC01      Phys.Rev. C 87, 054326 (2013)

T.Ichikawa, P.Moller, A.J.Sierk

Character and prevalence of third minima in actinide fission barriers

NUCLEAR STRUCTURE 228,230,232,234,236Ra, 228,230,232,234,236,238Th, 228,230,232,234,236U, 234,236Pu; calculated depth and height of triple-humped fission barriers, third (hyperdeformed) minima. Folded-Yukawa single particle potential in a macroscopic-microscopic model.

doi: 10.1103/PhysRevC.87.054326
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2013IC03      Phys.Rev. C 88, 011602 (2013)

T.Ichikawa, K.Matsuyanagi

Damping of quantum vibrations revealed in deep sub-barrier fusion

NUCLEAR REACTIONS 16O(16O, X), E not given; 40Ca(40Ca, X), E(cm)=47-66 MeV; calculated E3 transition strengths, damping factor for E3 transitions, transition densities and currents, fusion σ(E). Discussed damping of quantum vibrations in deep sub-barrier fusion reactions. Random-phase-approximation method for two-body system, and Coupled-channel (CC) model. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.011602
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2013KL03      J.Phys.:Conf.Ser. 445, 012036 (2013)

M.A.Klatt, T.Ichikawa, K.Iida, N.Itagaki, J.A.Maruhn, K.Matsuyanagi, K.Mecke, S.Ohkubo, P.-G.Reinhard, B.Schuetrumpf

Exotic cluster structures in the mean-field theory

NUCLEAR STRUCTURE 16O, 40Ca; calculated deformation, exotic shapes using Skyrme Hartree-Fock, TDHF.

doi: 10.1088/1742-6596/445/1/012036
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2013UH01      Nucl.Phys. A913, 127 (2013)

H.Uhrenholt, S.Aberg, A.Dobrowolski, Th.Dossing, T.Ichikawa, P.Moller

Combinatorial nuclear level-density model

NUCLEAR STRUCTURE 60Co, 68Zn, 76,78,80,82,84,86Sr, 94Nb, 97,98Mo, 107,109,111,112,113,114,115,117Cd, 127Te, 148Pm, 148,149Sm, 155Eu, 161,162Dy, 166,167Er, 169,170,171,172,173,174,175,177Yb, 194Ir, 237U, 239Pu; calculated level density, angular momentum distribution, parity ratio, pairing gap. 90Zr, 90Nb; calculated J, π level density. A=20-255; calculated level density at neutron separation energy, vibrational enhancement. Combinatorial (microcanonical) model with folded Yukawa, pairing, rotational and vibrational states. Compared with available data.

doi: 10.1016/j.nuclphysa.2013.06.002
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2012IC01      Phys.Rev. C 86, 024610 (2012)

T.Ichikawa, A.Iwamoto, P.Moller, A.J.Sierk

Contrasting fission potential-energy structure of actinides and mercury isotopes

NUCLEAR STRUCTURE 178,180,182,184,186,188,190,192,194,196,198,200Hg, 236U; calculated potential-energy surfaces as function of quadrupole moment, saddle points, barrier heights and the ridge heights for fission. Asymmetric fission. Effect of shell structure of fission fragments. Macroscopic-microscopic approach, finite-range liquid-drop model (FRLDM).

doi: 10.1103/PhysRevC.86.024610
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2012IC02      Phys.Rev. C 86, 031303 (2012)

T.Ichikawa, N.Itagaki, Y.Kanada-En'yo, Tz.Kokalova, W.von Oertzen

Search for three-α states around an 16O core in 28Si

NUCLEAR STRUCTURE 28Si; calculated 16O+α states including 24Mg+α, 16O12C basis wave functions, isoscalar monopole transition strengths, root-mean-square radii, density contours using Brink's α cluster model and the multiconfiguration mixing method. Hoyle-like 3α states.

doi: 10.1103/PhysRevC.86.031303
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2012IC03      Prog.Theor.Phys.(Kyoto), Suppl. 196, 269 (2012)

T.Ichikawa, K.Hagino, A.Iwamoto

Smooth Transition from Sudden to Adiabatic States in Deep-Subbarrier Fusion Reactions

NUCLEAR REACTIONS 64Ni(64Ni, X), 208Pb(16O, X), E(cm)<90 MeV; calculated fusion σ, average angular momenta of the compound nuclei; deduced adiabatic potential. Coupled-channel model calculations.

doi: 10.1143/PTPS.196.269
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2012IC04      Phys.Rev.Lett. 109, 232503 (2012)

T.Ichikawa, J.A.Maruhn, N.Itagaki, K.Matsuyanagi, P.-G.Reinhard, S.Ohkubo

Existence of an Exotic Torus Configuration in High-Spin Excited States of 40Ca

NUCLEAR STRUCTURE 40Ca; calculated high-spin states, J, π, neutron single-particle energies; deduced stable state with thorus configuration. Skyrme Hartree-Fock method, comparison with available data.

doi: 10.1103/PhysRevLett.109.232503
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2012MO02      At.Data Nucl.Data Tables 98, 149 (2012)

P.Moller, A.J.Sierk, R.Bengtsson, H.Sagawa, T.Ichikawa

Nuclear shape isomers

NUCLEAR STRUCTURE A=31-120; calculated potential-energy surfaces, deformations and all energy minima, shape isomers near 208Pb.

doi: 10.1016/j.adt.2010.09.002
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2011AS03      Phys.Rev. C 83, 014315 (2011)

M.Asai, K.Tsukada, H.Haba, Y.Ishii, T.Ichikawa, A.Toyoshima, T.Ishii, Y.Nagame, I.Nishinaka, Y.Kojima, K.Sueki

Neutron one-quasiparticle states in 251Fm151 populated via the α decay of 255No

RADIOACTIVITY 255No(α)[from 248Cm(12C, 5n), E=77 MeV; measured Eα, Iα, Eγ, Iγ, αγ-coin, T1/2, level half-lives from delayed spectra. 251Fm; deduced levels, J, π, α hindrance factors, conversion coefficients, multipolarities, B(E2), configurations. Comparison of α hindrance factors with those from α decay of 251Cf and 253Fm.

NUCLEAR STRUCTURE 245Pu, 247Cm, 249Cf, 251Fm, 253No, 255Rf; calculated one quasiparticle neutron states in N=151 nuclei using macroscopic-microscopic approach with finite-range liquid drop model involving β2, β4, β6 and β8 deformation parameters.

doi: 10.1103/PhysRevC.83.014315
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Data from this article have been entered in the XUNDL database. For more information, click here.

2011IC02      Phys.Rev. C 83, 054319 (2011)

T.Ichikawa, Y.Kanada-Enyo, P.Moller

Cluster formations in deformed states for 28Si and 32S

NUCLEAR STRUCTURE 28Si, 32S; calculated potential-energy curves versus quadrupole moment, rotational levels for normal-deformed (ND) and superdeformed (SD) states, density distributions of neutron single-particle wave functions, coulomb barrier heights. Cluster formation and structures similar to 16O+12C, 24Mg+α, 16O+16O and 28Si+α reaction channels. Relation between the one-body deformed minima and the two-body molecular-resonance states. Macroscopic-microscopic model. Comparison with experimental data.

doi: 10.1103/PhysRevC.83.054319
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2011IC03      Phys.Rev. C 83, 061301 (2011)

T.Ichikawa, N.Itagaki, T.Kawabata, Tz.Kokalova, W.von Oertzen

Gas-like state of α clusters around a 16O core in 24Mg

NUCLEAR STRUCTURE 24Mg; calculated energies and energy convergence of 0+ states with basis states for 16O+α+α configurations, strength distribution of the isoscalar E0 transitions from the ground state, α-cluster states around 16O. Microscopic α-cluster model, and overlap with Tohsaki-Horiuchi-Schuck-Ropke (THSR) wave functions.

doi: 10.1103/PhysRevC.83.061301
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2011IC04      Phys.Rev.Lett. 107, 112501 (2011)

T.Ichikawa, J.A.Maruhn, N.Itagaki, S.Ohkubo

Linear Chain Structure of Four-α Clusters in 16O

NUCLEAR STRUCTURE 16O; calculated surface and total nucleon density, coefficient of the rotational energy, angular momentum; deduced existence of stable exotic nuclei with large angular momentum of inertia. Skyrme cranked Hartree-Fock method.

doi: 10.1103/PhysRevLett.107.112501
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2011MU16      Phys.Rev. C 84, 034305 (2011)

K.Muta, T.Furumoto, T.Ichikawa, N.Itagaki

Three-triton states in 9Li

NUCLEAR STRUCTURE 9Li; calculated rms radii and energy convergence of 3/2- 3/2+, 1/2- and 1/2+ states, E0 transition strength; deduced α+t+n+n, t+t+t configurations in excited states of 9Li.

doi: 10.1103/PhysRevC.84.034305
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2011SA41      J.Phys.Soc.Jpn. 80, 094201 (2011)

N.Sato, H.Haba, T.Ichikawa, D.Kaji, Y.Kudou, K.Morimoto, K.Morita, K.Ozeki, T.Sumita, A.Yoneda, E.Ideguchi, H.Koura, A.Ozawa, T.Shinozuka, T.Yamaguchi, A.Yoshida

Production and Decay Properties of 264Hs and 265Hs

NUCLEAR REACTIONS 208Pb(58Fe, 2n), 207,208Pb(58Fe, n), E(cm)=200-227 MeV; measured reaction products; deduced σ.

RADIOACTIVITY 264,265Hs(α), (SF) [from 208Pb(58Fe, 2n), 207,208Pb(58Fe, n), E(cm)=200-227 MeV]; measured Eα, Iα; deduced α-particle energies, α and spontaneous fission branches, Q-values, T1/2.

doi: 10.1143/JPSJ.80.094201
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2360.

2010AN13      Phys.Rev.Lett. 105, 252502 (2010)

A.N.Andreyev, J.Elseviers, M.Huyse, P.Van Duppen, S.Antalic, A.Barzakh, N.Bree, T.E.Cocolios, V.F.Comas, J.Diriken, D.Fedorov, V.Fedosseev, S.Franchoo, J.A.Heredia, O.Ivanov, U.Koster, B.A.Marsh, P.Van den Bergh, J.Van De Walle, K.Nishio, R.D.Page, N.Patronis, M.Seliverstov, I.Tsekhanovich, M.Venhart, S.Vermote, M.Veselsky, C.Wagemans, T.Ichikawa, A.Iwamoto, P.Moller, A.J.Sierk

New Type of Asymmetric Fission in Proton-Rich Nuclei

RADIOACTIVITY 180Tl(α), (β+), (EC) [from U(p, X), E=1.4 GeV]; measured fission fragments, Eα, Iα, X-rays. 180Hg; deduced asymetric fission fragment distribution, branching ratio for β-delayed fission.

doi: 10.1103/PhysRevLett.105.252502
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Data from this article have been entered in the XUNDL database. For more information, click here.

2009AB18      Int.J.Mod.Phys. E18, 926 (2009)

S.Aberg, H.Uhrenholt, T.Ichikawa, P.Moller

Chaos and structure of level densities

NUCLEAR STRUCTURE 79Cu, 162Dy, 172Yb; calculated level density.

doi: 10.1142/S0218301309013063
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2009IC01      Phys.Rev. C 79, 014305 (2009)

T.Ichikawa, A.Iwamoto, P.Moller

Origin of the narrow, single peak in the fission-fragment mass distribution for 258Fm

RADIOACTIVITY 258Fm(SF); calculated potential energy, fragment charge distributions, inertial mass, mass-yield curves. Macroscopic-microscopic model.

doi: 10.1103/PhysRevC.79.014305
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2009IC04      Phys.Rev.Lett. 103, 202701 (2009)

T.Ichikawa, K.Hagino, A.Iwamoto

Signature of Smooth Transition from Sudden to Adiabatic States in Heavy-Ion Fusion Reactions at Deep Sub-Barrier Energies

NUCLEAR REACTIONS 208Pb(16O, X), 64Ni(64Ni, X), 58Ni(58Ni, X), E(cm)=60-105 MeV; analyzed fusion σ, S-factors, adiabatic potentials; deduced extension of the standard coupled-channels framework. Comparison with experiment.

doi: 10.1103/PhysRevLett.103.202701
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2009MO12      J.Phys.Soc.Jpn. 78, 064201 (2009)

K.Morita, K.Morimoto, D.Kaji, H.Haba, K.Ozeki, Y.Kudou, N.Sato, T.Sumita, A.Yoneda, T.Ichikawa, Y.Fujimori, S.Goto, E.Ideguchi, Y.Kasamatsu, K.Katori, Y.Komori, H.Koura, H.Kudo, K.Ooe, A.Ozawa, F.Tokanai, K.Tsukada, T.Yamaguchi, A.Yoshida

Decay Properties of 266Bh and 262Db Produced in the 248Cm + 23Na Reaction

NUCLEAR REACTIONS 248Cm(23Na, 4n), (23Na, 5n), E=126, 130, 132 MeV; measured yields.

RADIOACTIVITY 266Bh(α); measured Eα, Iα.

doi: 10.1143/JPSJ.78.064201
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2176.

2009MO18      Phys.Rev. C 79, 064304 (2009)

P.Moller, A.J.Sierk, T.Ichikawa, A.Iwamoto, R.Bengtsson, H.Uhrenholt, S.Aberg

Heavy-element fission barriers

NUCLEAR STRUCTURE Z=90-99, A=225-256; calculated double-humped fission barrier energies, first and second saddle heights, and fission-isomer energies. Z=78-125, N=91-188, A=171-312; calculated fission barrier heights for 1585 nuclides. 232Th; calculated proton and neutron single particle levels at saddles for symmetric and asymmetric fission modes. 228Th, 236U, 243Am, 252Cf, 278Nh, 305125; calculated potential energy surfaces. 232Th, 238,239,241,242,243Am; calculated fission-barrier structures and Fermi-gas level density parameters. Macroscopic-microscopic finite-range liquid-drop model.

RADIOACTIVITY 236U, 232,240Pu, 222,224,230Cm, 224,230Cf, 226,252,258Fm, 277Cn(α)(SF); calculated α-decay and SF decay half-lives. 180Tl, 188Bi, 192,194,196At, 228Np, 232,234Am, 238,240Bk, 242,244,246,248Es, 246,248,250Md(EC); calculated Q-values and fission barriers in the daughter nuclides. Macroscopic-microscopic finite-range liquid-drop model calculations. Comparisons with experimental data.

doi: 10.1103/PhysRevC.79.064304
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2009MO27      Phys.Rev.Lett. 103, 212501 (2009)

P.Moller, A.J.Sierk, R.Bengtsson, H.Sagawa, T.Ichikawa

Global Calculation of Nuclear Shape Isomers

NUCLEAR STRUCTURE A=31-290; calculated potential energy surfaces; 70,72,74,76,78Kr, 180Hg, 186Pb, 208Pb; deduced deformations, shape isomerism.

doi: 10.1103/PhysRevLett.103.212501
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2009SH34      Phys.Rev.Lett. 103, 232702 (2009)

A.Shrivastava, A.Navin, A.Lemasson, K.Ramachandran, V.Nanal, M.Rejmund, K.Hagino, T.Ichikawa, S.Bhattacharyya, A.Chatterjee, S.Kailas, K.Mahata, V.V.Parkar, R.G.Pillay, P.C.Rout

Exploring Fusion at Extreme Sub-Barrier Energies with Weakly Bound Nuclei

NUCLEAR REACTIONS 198Pt(6Li, xn)199Tl/200Tl/201Tl/202Tl, E(cm)<35 MeV; measured x-rays, Eγ, Iγ; deduced fusion and evaporation residue excitation functions, average angular momentum and logarithmic derivatives of the fusion σ, internuclear potentials.

doi: 10.1103/PhysRevLett.103.232702
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1767.

2008MO13      At.Data Nucl.Data Tables 94, 758 (2008)

P.Moller, R.Bengtsson, B.G.Carlsson, P.Olivius, T.Ichikawa, H.Sagawa, A.Iwamoto

Axial and reflection asymmetry of the nuclear ground state

NUCLEAR STRUCTURE A=31-330; calculated nuclear ground state masses, deformation parameters; effect of axial and reflection asymmetry and of triaxiality; macroscopic-microscopic approach using folded-Yukawa single particle potential.

doi: 10.1016/j.adt.2008.05.002
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2007IC01      Phys.Rev. C 75, 057603 (2007)

T.Ichikawa, K.Hagino, A.Iwamoto

Existence of a one-body barrier revealed in deep subbarrier fusion

NUCLEAR REACTIONS 64Ni(64Ni, X), E(cm)< 110 MeV; calculated fusion cross section with a two step model.

doi: 10.1103/PhysRevC.75.057603
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2007IC02      Phys.Rev. C 75, 064612 (2007)

T.Ichikawa, K.Hagino, A.Iwamoto

Systematics of threshold incident energy for deep sub-barrier fusion hindrance

NUCLEAR REACTIONS 89Y, 90Zr, 92Zr(90Zr, X), 64Ni, 74Ge, 100Mo(64Ni, X), 89Y(60Ni, X), 58Ni, 60Ni, 64Ni, 74Ge(58Ni, X), 208Pb(50Ti, X), 48Ca(48Ca, X), 90Zr(40Ca, X), 89Y(34S, X), 89Y(32S, X), 58,62,64Ni, (28Si, X), 208Pb(19F, X), 208Pb, 144Sm, 76Ge, 16O(16O, X), 16O, 14N, 13C(12O, X), 12C(11O, X), 10B(10B, X), E< 200 MeV; calculated potential energy at the touching configuration for heavy-ion reactions using various potential models. Compared results to available data.

doi: 10.1103/PhysRevC.75.064612
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2006MO31      Phys.Rev.Lett. 97, 162502 (2006)

P.Moller, R.Bengtsson, B.G.Carlsson, P.Olivius, T.Ichikawa

Global Calculations of Ground-State Axial Shape Asymmetry of Nuclei

NUCLEAR STRUCTURE 108Ru; calculated potential energy surface, deformation. Z=6-116; calculated ground-state axial asymmetry parameters.

doi: 10.1103/PhysRevLett.97.162502
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2005IC01      Phys.Rev. C 71, 044608 (2005)

T.Ichikawa, A.Iwamoto, P.Moller, A.J.Sierk

Barrier for cold-fusion production of superheavy elements

NUCLEAR REACTIONS 208Pb(48Ca, X), (50Ti, X), (54Cr, X), (58Fe, X), (62Ni, X), (64Ni, X), (70Zn, X), (74Ge, X), (76Ge, X), 209Bi(58Fe, X), (64Ni, X), (70Zn, X), E not given; calculated fusion barrier energies, deformation effects. Comparisons with data.

doi: 10.1103/PhysRevC.71.044608
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2005IC03      Phys.Rev. C 71, 067601 (2005)

T.Ichikawa, A.Iwamoto

Effect of charge polarization on the Coulomb barrier for cold-fusion reactions

NUCLEAR REACTIONS 208Pb(48Ca, X), (50Ti, X), (54Cr, X), (58Fe, X), (62Ni, X), (64Ni, X), (70Zn, X), (74Ge, X), (78Ge, X), 209Bi(58Fe, X), (64Ni, X), (70Zn, X), E not given; calculated Coulomb barrier height, effect of charge polarization.

doi: 10.1103/PhysRevC.71.067601
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2004AS07      Prog.Theor.Phys.(Kyoto), Suppl. 154, 457 (2004)

T.Asano, T.Wada, M.Ohta, T.Ichikawa, S.Yamaji, H.Nakahara

Dynamical Calculation of Multi-Modal Nuclear Fission of Fermium Isotopes

NUCLEAR STRUCTURE 256Fm; calculated fission fragment total kinetic energy and mass distributions, excitation energy dependence. Dynamical calculation.

doi: 10.1143/PTPS.154.457
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2004AS14      J.Nucl.Radiochem.Sci. 5, No 1, 1 (2004)

T.Asano, T.Wada, M.Ohta, T.Ichikawa, S.Yamaji, H.Nakahara

Dynamical Calculation of Multi-Modal Nuclear Fission of Fermium Nuclei

NUCLEAR STRUCTURE 256,258,264Fm; calculated fission fragments kinetic energy and mass distributions. Multi-modal fission model.

2004IW02      Nucl.Phys. A738, 499 (2004)

A.Iwamoto, T.Ichikawa, P.Moller, A.J.Sierk

Cluster expression in fission and fusion in high-dimensional macroscopic-microscopic calculations

NUCLEAR STRUCTURE 272Ds; calculated fission potential energy surfaces.

NUCLEAR REACTIONS 208Pb(64Ni, X), E not given; calculated collision surface energy vs projectile deformation.

doi: 10.1016/j.nuclphysa.2004.04.096
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2004MO38      Prog.Theor.Phys.(Kyoto), Suppl. 154, 21 (2004)

P.Moller, A.J.Sierk, T.Ichikawa, A.Iwamoto

Fission and Fusion at the End of the Periodic System

NUCLEAR REACTIONS 208Pb(50Ti, X), (70Zn, X), E not given; calculated potential energy vs separation and deformation. 208Pb(48Ca, X), (50Ti, X), (54Cr, X), (58Fe, X), (62Ni, X), (64Ni, X), (70Zn, X), (74Ge, X), (76Ge, X), E not given; calculated fusion barrier energies; deduced microscopic and deformation effects.

2002IC03      J.Nucl.Radiochem.Sci. 3, No 1, 67 (2002)

T.Ichikawa, T.Asano, T.Wada, M.Ohta

Dynamics of Fission Modes Studied with the 3-dimensional Langevin Equation

NUCLEAR STRUCTURE 270Sg; calculated fission modes deformations, shell correction energy, fragments kinetic energy and mass distributions.

2001IC02      Prog.Theor.Phys.(Kyoto) 105, 915 (2001)

T.Ichikawa, T.Wada, M.Ohta

Fission Width of Compound Nuclei Calculated Using the Mean First Passage Time Method

NUCLEAR STRUCTURE 238U; calculated fission width vs angular momentum. Mean first passage time method.

NUCLEAR REACTIONS 100Mo, 110Pd(100Mo, X), 110Pd(110Pd, X), E(cm)=170-290 MeV; calculated fission barrier, evaporation residue σ. Mean first passage time method.

doi: 10.1143/PTP.105.915
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