NSR Query Results
Output year order : Descending NSR database version of April 11, 2024. Search: Author = I.Hamamoto Found 147 matches. Showing 1 to 100. [Next]2021HA11 Phys.Lett. B 814, 136116 (2021) Deformed halo of 299F20 NUCLEAR STRUCTURE 29F; calculated neutron one-particle energies, deformed halo wave-functions using deformed Woods-Saxon potentials; deduced prolate deformation of the ground state.
doi: 10.1016/j.physletb.2021.136116
2019HA09 Phys.Rev. C 99, 024319 (2019) Shape and shell structure of lighter (N ≤ 90) neutron-rich nuclei based on a phenomenological Woods-Saxon potential NUCLEAR STRUCTURE N=10-60; N=40-90; calculated neutron one-particle energies in a spherically symmetric Woods-Saxon potential with N/Z=2.0 for N=10-60 nuclei, N/Z=1.7 and along the stability line for N=40-90 nuclei. 70Fe; calculated proton and neutron single particle energies as a function of quadrupole deformation β2. Phenomenological Woods-Saxon potential. Shape and shell structure of lighter neutron-rich nuclei away from the stability line in the context of N=20 and N=40 "islands of inversion" (IoI).
doi: 10.1103/PhysRevC.99.024319
2019HA22 Phys.Rev. C 100, 014324 (2019) Enhanced E1 transition between weakly-bound excited states in the nucleus 27Ne NUCLEAR STRUCTURE 27Ne; calculated B(E1) between the weakly-bound first and second excited states; deduced prolate deformed states. Discussed deformed halo arising from shell structure unique in weakly-bound or resonant neutrons. Shell structure of one-particle energy spectra in the axially symmetric quadrupole-deformed potential, using spherical one-body Woods-Saxon potential. Relevance to recently-reported experimental strong electric-dipole (E1) transition in 27Ne.
doi: 10.1103/PhysRevC.100.014324
2017HA13 Phys.Rev. C 95, 044325 (2017) Examining possible neutron-halo nuclei heavier than 37Mg NUCLEAR STRUCTURE 71,73,75Cr, 77Fe, 53Ar; calculated one-particle energies for neutrons, spherical halo, deformed halo, change of shell-structure, narrowed N=50 spherical energy gap for even-Z odd-N neutron-halo nuclei, weakly-bound neutrons. Shell structure with Woods-Saxon potentials.
doi: 10.1103/PhysRevC.95.044325
2017HA32 Phys.Rev. C 96, 064312 (2017) Interplay between isoscalar and isovector correlations in neutron-rich nuclei NUCLEAR STRUCTURE 22,24O; calculated isoscalar compression dipole (ISCD) and isovector dipole (IVD) strengths for 1- giant resonance as a function of excitation energy, radial transition densities. Self-consistent Hartree-Fock plus the random-phase approximation (RPA) with the Skyrme interaction, SLy4.
doi: 10.1103/PhysRevC.96.064312
2016HA15 Phys.Rev. C 93, 054328 (2016) Shell structure of one-particle resonances in deformed potentials NUCLEAR STRUCTURE 21C, 39Mg, 49Ti; calculated and analyzed one-neutron resonant levels, J, π and related one-neutron emission widths for prolate-deformed 39Mg and oblate-deformed 21C. Axially symmetric quadrupole deformation neglecting pair correlation. Comparison with available experimental data for 21C.
doi: 10.1103/PhysRevC.93.054328
2014HA15 Phys.Rev. C 89, 057301 (2014) Oblate deformation of light neutron-rich even-even nuclei NUCLEAR STRUCTURE 20C, 42Si; calculated one-particle energies for neutrons as a function of axially symmetric quadrupole deformation by solving the coupled differential equations; oblate shapes for ground states from Nilsson diagrams based on realistic Woods-Saxon potentials. 64,76Ni; possible candidates in A=70 region for oblate ground-state deformation.
doi: 10.1103/PhysRevC.89.057301
2014HA30 Phys.Rev. C 90, 031302 (2014) Self-consistent Hartree-Fock and RPA Green's function method indicate no pygmy resonance in the monopole response of neutron-rich Ni isotopes NUCLEAR STRUCTURE 68Ni; calculated monopole strength function (ISGMR) as a function of excitation energy, and the unperturbed particle-hole excitation strength using SLy4 interaction in the Hartree-Fock (HF) and the RPA Green's function methods.
doi: 10.1103/PhysRevC.90.031302
2013HA20 Phys.Rev. C 88, 024327 (2013) Possible presence and properties of multi-chiral-pair bands in odd-odd nuclei with the same intrinsic configuration NUCLEAR STRUCTURE 104,106Rh; calculated multi-chiral pair bands, triaxial shape for the presence of chiral pair bands, B(M1). Identification of chiral pair bands based on internal structure. Particle-rotor model.
doi: 10.1103/PhysRevC.88.024327
2012HA21 Phys.Rev. C 85, 064329 (2012) Neutron shell structure and deformation in neutron-drip-line nuclei NUCLEAR STRUCTURE 18C, 34Mg, 66Ti, 126Ru; calculated bound and resonant neutron one particle energies as a function of quadrupole deformation in neutron-drip nuclei using phenomenological Woods-Saxon potentials. Disappearance of N=28 magic number, possible disappearance of N=50 magic number, and presumable survival of N=82 magic number.
doi: 10.1103/PhysRevC.85.064329
2011HA14 Int.J.Mod.Phys. E20, 373 (2011) Selection rule for electromagnetic transitions in nuclear chiral geometry NUCLEAR STRUCTURE 126,128Cs, 132La, 134Pr; analyzed inter- and intra-bands; deduced selection rule. Comparison with experimental data.
doi: 10.1142/S0218301311017740
2011ST06 Int.J.Mod.Phys. E20, 349 (2011) K.Starosta, A.Chester, I.Hamamoto, T.Koike, J.Timar Opportunities for collective model and chirality studies at TRIUMF
doi: 10.1142/S0218301311017715
2010HA05 Phys.Rev. C 81, 021304 (2010) Interpretation of Coulomb breakup of 31Ne in terms of deformation NUCLEAR STRUCTURE 31Ne; calculated coulomb breakup σ and neutron one-particle levels as a function of quadrupole deformation parameter using the Woods-Saxon potential. Calculated contribution of different Nilsson orbits, interpretation of ground state in terms of p-wave neutron halo structure and deformed 30Ne core.
doi: 10.1103/PhysRevC.81.021304
2010HA07 J.Phys.(London) G37, 055102 (2010) Change of shell structure and magnetic moments of odd-N deformed nuclei towards the neutron drip line NUCLEAR STRUCTURE 11Be, 15,17C, 31,33Mg, 41Si, 45S; calculated magnetic dipole moments, neutron one-particle levels as a function of axially symmetric quadrupole deformation. Deformed Woods-Saxon potentials.
doi: 10.1088/0954-3899/37/5/055102
2010YO01 Phys.Rev.Lett. 104, 129201 (2010) D.T.Yordanov, K.Blaum, M.De Rydt, M.Kowalska, R.Neugart, G.Neyens, I.Hamamoto Comment on "Intruder Configurations in the A=33 Isobars: 33Mg and 33Al" NUCLEAR STRUCTURE 33Mg, 33Al; calculated magnetic moments; deduced 33Mg π. Comparison with experimental data.
doi: 10.1103/PhysRevLett.104.129201
2009HA02 Phys.Rev. C 79, 014307 (2009) One-particle properties of deformed N ≈ 28 odd-N nuclei with weakly bound or resonant neutrons NUCLEAR STRUCTURE 43S, 45S, 39Mg, 52Cr; calculated levels, J, π, magnetic moments using Schrodinger equation, Nilsson diagrams, and deformed Woods-Saxon potential.
doi: 10.1103/PhysRevC.79.014307
2009HA08 Phys.Rev. C 79, 034317 (2009) Further examination of prolate-shape dominance in nuclear deformation
doi: 10.1103/PhysRevC.79.034317
2009HA33 Phys.Rev. C 80, 041304 (2009); Publishers Note, Phys.Rev. C 80, 059901 (2009) D.J.Hartley, R.V.F.Janssens, L.L.Riedinger, M.A.Riley, A.Aguilar, M.P.Carpenter, C.J.Chiara, P.Chowdhury, I.G.Darby, U.Garg, Q.A.Ijaz, F.G.Kondev, S.Lakshmi, T.Lauritsen, A.Ludington, W.C.Ma, E.A.McCutchan, S.Mukhopadhyay, R.Pifer, E.P.Seyfried, I.Stefanescu, S.K.Tandel, U.Tandel, J.R.Vanhoy, X.Wang, S.Zhu, I.Hamamoto, S.Frauendorf Wobbling mode in 167Ta NUCLEAR REACTIONS 120Sn(51V, 4n), E=235 MeV; measured Eγ, Iγ, γγ-coin and γγ(θ) using Gammasphere array. 167Ta; deduced levels, J, π, triaxial superdeformed bands, normal deformed bands, dynamic moments of inertia, alignments and rotational frequency. Comparison with ultimate cranked (UC) calculations.
doi: 10.1103/PhysRevC.80.041304
2009VA06 Phys.Rev.Lett. 102, 242502 (2009) J.J.Valiente-Dobon, D.Mengoni, A.Gadea, E.Farnea, S.M.Lenzi, S.Lunardi, A.Dewald, Th.Pissulla, S.Szilner, R.Broda, F.Recchia, A.Algora, L.Angus, D.Bazzacco, G.Benzoni, P.G.Bizzeti, A.M.Bizzeti-Sona, P.Boutachkov, L.Corradi, F.Crespi, G.de Angelis, E.Fioretto, A.Gorgen, M.Gorska, A.Gottardo, E.Grodner, B.Guiot, A.Howard, W.Krolas, S.Leoni, P.Mason, R.Menegazzo, D.Montanari, G.Montagnoli, D.R.Napoli, A.Obertelli, T.Pawlat, B.Rubio, E.Sahin, F.Scarlassara, R.Silvestri, A.M.Stefanini, J.F.Smith, D.Steppenbeck, C.A.Ur, P.T.Wady, J.Wrzesinski, E.Maglione, I.Hamamoto Lifetime Measurements of the Neutron-Rich N = 30 Isotones 50Ca and 51Sc: Orbital Dependence of Effective Charges in the fp Shell NUCLEAR REACTIONS 208Pb(48Ca, 50Ca), (48Ca, 51Sc), E=310 MeV; measured Eγ, Iγ, half-lives for first excited states using DSAM. 50Ca, 51Sc; deduced B(E2).
doi: 10.1103/PhysRevLett.102.242502
2008HA16 Phys.Rev. C 77, 054311 (2008) Neutron decay width of one-particle resonant levels in deformed nuclei NUCLEAR STRUCTURE 13Be; calculated neutron decay widths, wave functions of one-particle resonant levels. Woods-Saxon potential used.
doi: 10.1103/PhysRevC.77.054311
2007HA50 J.Phys.(London) G34, 2715 (2007) Properties of 12Be and 11Be in terms of single-particle motion in deformed potential NUCLEAR STRUCTURE 11,12Be; calculated level energies, B(E0), B(E2), and deformation parameters. Compared results to available data.
doi: 10.1088/0954-3899/34/12/015
2007HA53 Phys.Rev. C 76, 054319 (2007) Nilsson diagrams for light neutron-rich nuclei with weakly-bound neutrons NUCLEAR STRUCTURE 15,17,19C, 31,33,35,37Mg; calculated one-particle bound and resonant level energies. Deduced Nilsson diagrams using Woods-Saxon potential.
doi: 10.1103/PhysRevC.76.054319
2007HA56 Eur.Phys.J. Special Topics 150, 123 (2007) Resonant and weakly-bound one-particle levels in quadrupole-deformed potentials
doi: 10.1140/epjst/e2007-00283-7
2007SH34 Phys.Lett. B 654, 87 (2007) S.Shimoura, S.Ota, K.Demichi, N.Aoi, H.Baba, Z.Elekes, T.Fukuchi, T.Gomi, K.Hasegawa, E.Ideguchi, M.Ishihara, N.Iwasa, H.Iwasaki, S.Kanno, S.Kubono, K.Kurita, M.Kurokawa, Y.U.Matsuyama, S.Michimasa, K.Miller, T.Minemura, T.Motobayashi, T.Murakami, M.Notani, A.Odahara, A.Saito, H.Sakurai, E.Takeshita, S.Takeuchi, M.Tamaki, T.Teranishi, K.Yamada, Y.Yanagisawa, I.Hamamoto Lifetime of the isomeric 0+2 state in 12Be NUCLEAR REACTIONS 9Be(18O, X)12Be, E=100 MeV/nucleon; measured delayed Eγ, Iγ, γγ-coin. 12Be deduced isomeric state energy J, π, T1/2, decay branching, B(E2), B(E0). Comparison with shell model calculations.
doi: 10.1016/j.physletb.2007.08.053
2006FU15 Phys.Scr. T125, 194 (2006) Y.Fujita, I.Hamamoto, H.Fujita, Y.Shimbara, T.Adachi, G.P.A.Berg, K.Fujita, K.Hatanaka, J.Kamiya, K.Nakanishi, Y.Sakemi, Y.Shimizu, M.Uchida, T.Wakasa, M.Yosoi Identification of the [202]3/2 deformed band in mirror nuclei 25Mg and 25Al and implications for unstable nuclei NUCLEAR REACTIONS 25Mg(3He, t), E=140 MeV/nucleon; measured triton spectra, σ(θ=0°). 25Al deduced levels, J, π, B(GT), rotational band. Comparison with mirror states in 25Mg.
doi: 10.1088/0031-8949/2006/T125/047
2006HA16 Phys.Rev. C 73, 044317 (2006) Pair correlation in deformed neutron-drip-line nuclei: The eigenphase formalism and asymptotic behavior
doi: 10.1103/PhysRevC.73.044317
2006HA24 Phys.Rev. C 73, 064308 (2006) Positive-energy one-particle levels in quadrupole-deformed Woods-Saxon potentials
doi: 10.1103/PhysRevC.73.064308
2006HA31 J.Phys.(London) G32, 1105 (2006) I.Hamamoto, H.Sagawa, X.-R.Zhou Weakly bound neutrons and quadrupole response function in the many-body pair correlation of neutron drip line nuclei NUCLEAR STRUCTURE 84Ni; calculated quasiparticle energies, quadrupole response function. Simplified HFB equation, surface-type and volume-type pairing.
doi: 10.1088/0954-3899/32/8/003
2006PE07 Phys.Rev.Lett. 96, 112502 (2006) C.M.Petrache, G.B.Hagemann, I.Hamamoto, K.Starosta Risk of Misinterpretation of Nearly Degenerate Pair Bands as Chiral Partners in Nuclei NUCLEAR STRUCTURE 134Pr, 136Pm; analyzed rotational bands energies, B(E2), related features; deduced insufficient evidence for chiral partner bands.
doi: 10.1103/PhysRevLett.96.112502
2006ST26 Phys.Scr. T125, 18 (2006) K.Starosta, I.Hamamoto, T.Koike, C.Vaman Electromagnetic properties of nuclear chiral partners NUCLEAR STRUCTURE 134Pr; analyzed levels, J, π, B(M1)/B(E2), chiral partner bands. 128Cs, 132La; analyzed chiral partner bands B(E2), B(M1).
doi: 10.1088/0031-8949/2006/T125/004
2005HA11 Phys.Rev. C 71, 037302 (2005) Effective pair gap of weakly bound neutrons in deformed nuclei
doi: 10.1103/PhysRevC.71.037302
2005HA44 Phys.Rev. C 72, 024301 (2005) One-particle resonant levels in a deformed potential
doi: 10.1103/PhysRevC.72.024301
2004FU02 Phys.Rev.Lett. 92, 062502 (2004) Y.Fujita, I.Hamamoto, H.Fujita, Y.Shimbara, T.Adachi, G.P.A.Berg, K.Fujita, K.Hatanaka, J.Kamiya, K.Nakanishi, Y.Sakemi, Y.Shimizu, M.Uchida, T.Wakasa, M.Yosoi Evidence for the Existence of the [2 0 2]3/2 Deformed Band in Mirror Nuclei 25Mg and 25Al NUCLEAR REACTIONS 25Mg(3He, t), E=140 MeV/nucleon; measured triton spectra, σ(θ=0°). 25Al deduced levels, J, π, B(GT), rotational band. Comparison with mirror states in 25Mg.
doi: 10.1103/PhysRevLett.92.062502
2004HA07 Nucl.Phys. A731, 211 (2004) Shell-structure and pair-correlation in nuclei close to the neutron drip line
doi: 10.1016/j.nuclphysa.2003.11.033
2004HA23 Phys.Rev. C 69, 041306 (2004) Dominance of low-l component in weakly bound deformed single-neutron orbits
doi: 10.1103/PhysRevC.69.041306
2004HA37 Phys.Rev. C 69, 064302 (2004) Weakly bound s1/2 neutrons in the many-body pair correlation of neutron drip line nuclei
doi: 10.1103/PhysRevC.69.064302
2004HA44 Phys.Rev. C 70, 034317 (2004) Weakly bound p3/2 neutrons and spin-response function in the many-body pair correlation of neutron drip line nuclei
doi: 10.1103/PhysRevC.70.034317
2004JE03 Eur.Phys.J. A 19, 173 (2004) D.R.Jensen, G.B.Hagemann, I.Hamamoto, B.Herskind, G.Sletten, J.N.Wilson, S.W.Odegard, K.Spohr, H.Hubel, P.Bringel, A.Neusser, G.Schonwasser, A.K.Singh, W.C.Ma, H.Amro, A.Bracco, S.Leoni, G.Benzoni, A.Maj, C.M.Petrache, G.Lo Bianco, P.Bednarczyk, D.Curien Coexisting wobbling and quasiparticle excitations in the triaxial potential well of 163Lu NUCLEAR REACTIONS 139La(29Si, 5n), E=157 MeV; measured Eγ, Iγ, γγ-coin. 163Lu deduced high-spin levels, J, π, configurations, triaxial superdeformed bands. Euroball array.
doi: 10.1140/epja/i2003-10120-5
2004KO55 Phys.Rev.Lett. 93, 172502 (2004) T.Koike, K.Starosta, I.Hamamoto Chiral Bands, Dynamical Spontaneous Symmetry Breaking, and the Selection Rule for Electromagnetic Transitions in the Chiral Geometry NUCLEAR STRUCTURE 130Cs; calculated levels, J, π, B(E2), B(M1), degenerate chiral rotational bands, selection rule.
doi: 10.1103/PhysRevLett.93.172502
2004SH02 Eur.Phys.J. A 19, 25 (2004) Y.Shimbara, Y.Fujita, T.Adachi, G.P.A.Berg, H.Fujita, K.Fujita, I.Hamamoto, K.Hatanaka, J.Kamiya, K.Nakanishi, Y.Sakemi, Y.Shimizu, M.Uchida, T.Wakasa, M.Yosoi Suppression of Gamow-Teller, M1 transitions in deformed mirror nuclei 25Mg and 25Al NUCLEAR REACTIONS 25Mg(3He, t), E=140 MeV/nucleon; measured triton spectra; deduced Gamow-Teller and magnetic dipole transition strength distributions.
doi: 10.1140/epja/i2003-10115-2
2003HA02 Phys.Rev. C 67, 014319 (2003) Quantized wobbling excitations with alignments NUCLEAR STRUCTURE 163Lu; calculated level energies, B(E2), wobbling mode features for triaxial, strongly-deformed rotational bands.
doi: 10.1103/PhysRevC.67.014319
2003HA27 Phys.Rev. C 68, 034312 (2003) Pair correlation in neutron drip line nuclei
doi: 10.1103/PhysRevC.68.034312
2003HA38 Nucl.Phys. A722, 389c (2003) Nuclear wobbling-phonon excitations with alignments NUCLEAR STRUCTURE 163Lu; calculated rotational band energies, B(E2), wobbling mode.
doi: 10.1016/S0375-9474(03)01395-2
2003HA54 C.R.Physique 4, 433 (2003) A personal view of some issues involved in the structure of nuclei with large neutron excess
doi: 10.1016/S1631-0705(3)00059-8
2002FU17 Phys.Rev. C66, 044313 (2002) Y.Fujita, Y.Shimbara, I.Hamamoto, T.Adachi, G.P.A.Berg, H.Fujimura, H.Fujita, J.Gorres, K.Hara, K.Hatanaka, J.Kamiya, T.Kawabata, Y.Kitamura, Y.Shimizu, M.Uchida, H.P.Yoshida, M.Yoshifuku, M.Yosoi M1 and Gamow-Teller transitions in T = 1/2 nuclei 23Na and 23Mg NUCLEAR REACTIONS 23Na(3He, t), E=140 MeV/nucleon; measured triton spectra, σ(θ=0°). 23Na, 23Mg deduced Gamow-Teller transition strengths, B(M1), orbital contributions. Particle-rotor model. Astrophysical implications discussed. NUCLEAR STRUCTURE 23Na, 23Mg; analyzed M1 and Gamow-Teller transition strengths; deduced orbital contributions, related features.
doi: 10.1103/PhysRevC.66.044313
2002HA16 Eur.Phys.J. A 13, 21 (2002) Properties Unique in Nuclei Far from β Stability Line
doi: 10.1007/s10050-002-8712-6
2002HA19 Phys.Rev. C65, 044305 (2002) Wobbling Excitations in Odd-A Nuclei with High-j Aligned Particles
doi: 10.1103/PhysRevC.65.044305
2002HA44 Phys.Rev. C66, 044315 (2002) Isoscalar dipole strength in 82208Pb126: The spurious mode and the strength in the continuum NUCLEAR STRUCTURE 208Pb; calculated isoscalar dipole strength distribution; deduced spurious component, related features. Schematic harmonic-oscillator model.
doi: 10.1103/PhysRevC.66.044315
2002HA58 Prog.Theor.Phys.(Kyoto), Suppl. 146, 143 (2002) Shape, Shell Structure and Collective Modes Unique to Nuclei Far from Stability Line NUCLEAR STRUCTURE 60Ca; calculated single-particle level energies, octupole strength distributions.
doi: 10.1143/PTPS.146.143
2002JE05 Nucl.Phys. A703, 3 (2002) D.R.Jensen, G.B.Hagemann, I.Hamamoto, S.W.Odegard, M.Bergstrom, B.Herskind, G.Sletten, S.Tormanen, J.N.Wilson, P.O.Tjom, K.Spohr, H.Hubel, A.Gorgen, G.Schonwasser, A.Bracco, S.Leoni, A.Maj, C.M.Petrache, P.Bednarczyk, D.Curien Wobbling Phonon Excitations, Coexisting with Normal Deformed Structures in 163Lu NUCLEAR REACTIONS 139La(29Si, 5n), E=152 MeV; measured Eγ, Iγ, γγ-coin. 163Lu deduced high-spin levels, J, π, configurations, B(M1)/B(E2), triaxial superdeformed bands, wobbling modes. Euroball IV array, particle-rotor calculations.
doi: 10.1016/S0375-9474(01)01459-2
2002JE10 Phys.Rev.Lett. 89, 142503 (2002) D.R.Jensen, G.B.Hagemann, I.Hamamoto, S.W.Odegard, B.Herskind, G.Sletten, J.N.Wilson, K.Spohr, H.Hubel, P.Bringel, A.Neusser, G.Schonwasser, A.K.Singh, W.C.Ma, H.Amro, A.Bracco, S.Leoni, G.Benzoni, A.Maj, C.M.Petrache, G.Lo Bianco, P.Bednarczyk, D.Curien Evidence for Second-Phonon Nuclear Wobbling NUCLEAR REACTIONS 139La(29Si, 5n), E=157 MeV; measured Eγ, Iγ, γγ-coin. 163Lu deduced high-spin levels, J, π, δ, superdeformed bands, B(M1), B(E2), wobbling excitation mode. Euroball IV array.
doi: 10.1103/PhysRevLett.89.142503
2001HA10 Nucl.Phys. A683, 255 (2001) I.Hamamoto, S.V.Lukyanov, X.Z.Zhang Kinetic Energy and Spin-Orbit Splitting in Nuclei Near Neutron Drip Line
doi: 10.1016/S0375-9474(00)00443-7
2001HA27 Nucl.Phys. A687, 9c (2001) Giant Resonances of Nuclei Far from β Stability Lines vs. β Stable Nuclei NUCLEAR STRUCTURE 60Ca; calculated single particle levels, wave functions, quadrupole giant resonance strength distributions. Hartree-Fock, RPA methods, spin-orbit term discussed.
doi: 10.1016/S0375-9474(01)00594-2
2001HA45 Phys.Rev. C64, 024313 (2001) I.Hamamoto, H.Sagawa, X.Z.Zhang Shape, Shell Structure, and Low-Lying Strong Octupole Strength in 2060Ca40 NUCLEAR STRUCTURE 60Ca, 68Ni, 80Zr; calculated levels, J, π, octupole strength distributions. Self-consistent Hartree-Fock, RPA, Skyrme interactions.
doi: 10.1103/PhysRevC.64.024313
2001HA54 Acta Phys.Pol. B32, 2545 (2001) I.Hamamoto, S.W.Odegard, G.B.Hagemann, D.R.Jensen, M.Bergstrom, B.Herskind, G.Sletten, S.Tormanen, J.N.Wilson, P.O.Tjom, K.Spohr, H.Hubel, A.Gorgen, G.Schonwasser, A.Bracco, S.Leoni, A.Maj, C.M.Petrache, P.Bednarczyk, D.Curien First Evidence for the Wobbling Mode in a Triaxial Superdeformed Odd-A Nucleus NUCLEAR REACTIONS 139La(29Si, 5n), E=152 MeV; measured Eγ, Iγ, γγ-coin. 163Lu deduced high-spin levels, J, π, triaxial superdeformed band, B(M1)/B(E2), wobbling mode. Euroball IV array. Particle-rotor model calculations.
2001OD02 Nucl.Phys. A682, 427c (2001) S.W.Odegard, G.B.Hagemann, M.Bergstrom, B.Herskind, D.R.Jensen, G.Sletten, S.Tormanen, J.Wilson, P.O.Tjom, K.Spohr, H.Hubel, A.Gorgen, G.Schonwasser, A.Bracco, S.Leoni, A.Maj, C.Petrache, P.Bednarczyk, D.Curien, I.Hamamoto Search for the Wobbling Mode Built on Triaxial Super Deformation NUCLEAR REACTIONS 139La(29Si, 5n), E=152 MeV; measured Eγ, Iγ, γγ-coin. 163Lu deduced high-spin levels, J, π, triaxial superdeformed bands, B(M1)/B(E2), possible wobbling mode. Euroball IV array. Cranked mean-field calculations.
doi: 10.1016/S0375-9474(00)00669-2
2001OD03 Phys.Rev.Lett. 86, 5866 (2001) S.W.Odegard, G.B.Hagemann, D.R.Jensen, M.Bergstrom, B.Herskind, G.Sletten, S.Tormanen, J.N.Wilson, P.O.Tjom, I.Hamamoto, K.Spohr, H.Hubel, A.Gorgen, G.Schonwasser, A.Bracco, S.Leoni, A.Maj, C.M.Petrache, P.Bednarczyk, D.Curien Evidence for the Wobbling Mode in Nuclei NUCLEAR REACTIONS 139La(29Si, 5n), E=152 MeV; measured Eγ, Iγ, γγ-coin. 163Lu deduced high-spin levels, J, π, configurations, transitions B(E2), B(M1), wobbling mode. Euroball IV array. Particle-rotor model calculations.
doi: 10.1103/PhysRevLett.86.5866
2001UR04 Phys.Rev. C64, 054304 (2001) P.Urkedal, X.Z.Zhang, I.Hamamoto Low-Lying Appreciable Gamow-Teller Strength in Deformed Neutron-Rich Nuclei NUCLEAR STRUCTURE 100,102,104,106,108,110Sr, 102,104,106,108,110,112Zr, 104,106,108,110,112Mo, 106,108,110,112,114Ru, 110,112,114,116Pd, 158,160,162,164,166Gd, 160,162,164,166,168Dy, 162,164,166,168,170,172,174Er, 164,166,168,170,172,174,176,178Yb, 170,172,174,176,178,180,182Hf, 176,178,180,182,184W; calculated pair-correlation parameters, quadrupole moments, deformation. 108Mo, 160Gd, 162,164Dy, 170Er, 176Yb, 178Hf; calculated Gamow-Teller strength distributions. 160Gd, 164Dy, 170Er, 176Yb; deduced appreciable low-lying Gamow-Teller strength. Skyrme-Hartree-Fock calculations, Tamm-Dancoff approximation, RPA.
doi: 10.1103/PhysRevC.64.054304
2000HA36 Phys.Rev. C62, 024318 (2000) Polarization Associated with the Coupling to Isoscalar Dipole Compression Mode NUCLEAR STRUCTURE 208Pb; calculated one-particle isoscalar dipole moments, role of coupling with isoscalar GDR.
doi: 10.1103/PhysRevC.62.024318
2000HA37 Phys.Rev. C62, 024319 (2000) Charge-Exchange Spin Monopole Modes NUCLEAR STRUCTURE 48Ca, 90Zr, 208Pb; calculated charge-exchange spin monopole response functions. Hartree-Fock plus TDA.
doi: 10.1103/PhysRevC.62.024319
1999HA09 Nucl.Phys. A648, 203 (1999) I.Hamamoto, H.Sagawa, X.Z.Zhang Displacement Fields of Excited States in Stable and Neutron Drip-Line Nuclei NUCLEAR STRUCTURE 11Be, 60Ca, 208Pb; calculated multipole excitation modes transition densities, displacement fields. Self-consistent Hartree-Fock plus RPA.
doi: 10.1016/S0375-9474(99)00024-X
1999HA28 Phys.Rev. C60, 011305 (1999) Gamow-Teller β+ Decays of Deformed N ≈ Z Sr Isotopes Close to the Proton Drip Line NUCLEAR STRUCTURE 75,76Sr; calculated Gamow-Teller strength for β+ decay; deduced dependence on deformation, neutron-proton interaction.
doi: 10.1103/PhysRevC.60.011305
1999HA44 Phys.Rev. C60, 031303 (1999) Neutron-Proton Ratio of Collective Excitations
doi: 10.1103/PhysRevC.60.031303
1999HA57 Phys.Rev. C60, 054320 (1999) Anharmonicity of Giant Resonances
doi: 10.1103/PhysRevC.60.054320
1999HA61 Phys.Rev. C60, 064314 (1999) Response of Light Drip Line Nuclei to Spin Dependent Operators NUCLEAR STRUCTURE 8,10,12,14,16,18,20,22C; calculated single-particle level energies. 8He, 8,22C; calculated M1, spin, orbital strength distributions. Self-consistent Hartree-Fock, RPA with Skyrme interactions.
doi: 10.1103/PhysRevC.60.064314
1999SA22 Nucl.Phys. A649, 319c (1999) H.Sagawa, I.Hamamoto, X.Z.Zhang A Microscopic Study of Giant Resonances in Nuclei Near Drip Lines NUCLEAR STRUCTURE 208Pb, 34,40,48,60Ca; calculated giant monopole resonance strength distributions. 100Sn; calculated core polarization charges, B(E2). 90Zr, 100Sn; calculated neutron, proton effective charges. Self-consistent Hartree-Fock plus RPA model.
doi: 10.1016/S0375-9474(99)00094-9
1998HA09 Phys.Rev. C57, R1064 (1998) I.Hamamoto, H.Sagawa, X.Z.Zhang Isoscalar and Isovector Dipole Mode in Drip Line Nuclei in Comparison with β-Stable Nuclei NUCLEAR STRUCTURE 22C, 28O, 34,40,60Ca, 208Pb; calculated isoscalar, isovector dipole strength vs excitation energy; deduced giant resonance features. Hartree-Fock plus RPA calculations, Skyrme interactions.
doi: 10.1103/PhysRevC.57.R1064
1998HA39 J.Phys.(London) G24, 1417 (1998) I.Hamamoto, H.Sagawa, X.Z.Zhang Collective Modes of Nuclei Far from β-Stability Line NUCLEAR STRUCTURE 28O, 34Ca, 100Sn, 208Pb; calculated isoscalar, isovector dipole strength distributions.
doi: 10.1088/0954-3899/24/8/016
1998HA60 Phys.Rev. C58, 3388 (1998) Coupling of Particles Near Threshold to Shape Oscillations
doi: 10.1103/PhysRevC.58.3388
1998SA28 J.Phys.(London) G24, 1445 (1998) H.Sagawa, I.Hamamoto, X.Z.Zhang Giant Monopole States in Nuclei Near Drip Lines NUCLEAR STRUCTURE 34,40,48,60Ca, 208Pb; calculated isocalar, isovector monopole strength distributions. Hartree-Fock plus RPA model.
doi: 10.1088/0954-3899/24/8/019
1998UR03 Phys.Rev. C58, R1889 (1998) Deformation and One-Particle Orbits in 3671Kr35 and 3571Br36 NUCLEAR STRUCTURE 72Kr; calculated single-particle levels, deformation. 71Br, 71Kr; analyzed decay data, Gamow-Teller strengths; deduced deformations, levels J, π. Hartree-Fock calculations.
doi: 10.1103/PhysRevC.58.R1889
1997HA17 Phys.Lett. 394B, 1 (1997) Electric Quadrupole Polarization Charges in Proton Drip Line Nuclei NUCLEAR STRUCTURE 48Ni, 100Sn; calculated isoscalar, isovector quadrupole strength function, nucleon polarization charges, B(E2). Hartree-Fock with Skyrme interactions, RPA solved in coordinate space with the Green's function method.
doi: 10.1016/S0370-2693(96)01657-7
1997HA20 Phys.Rev. C55, 2361 (1997) I.Hamamoto, H.Sagawa, X.Z.Zhang Structure of Giant Quadrupole Resonances in Neutron Drip Line Nuclei NUCLEAR STRUCTURE 28O; 48Ca; calculated isoscalar GQR associated radial transition density, strength function. Self-consistent Hartree-Fock plus RPA, Skyrme interaction.
doi: 10.1103/PhysRevC.55.2361
1997HA55 Nucl.Phys. A626, 669 (1997) I.Hamamoto, H.Sagawa, X.Z.Zhang Quadrupole Strength Function and Core Polarization in Drip Line Nuclei NUCLEAR STRUCTURE 28O, 34,40,60Ca, 48Ni, 48Ca; calculated isoscalar, isovector quadrupole RPA strength functions, polarizations. Self-consistent Hartree-Fock calculations, Skyrme interactions.
doi: 10.1016/S0375-9474(97)00478-8
1997HA57 Phys.Rev. C56, 3121 (1997) I.Hamamoto, H.Sagawa, X.Z.Zhang Giant Monopole Resonances in Nuclei Near Stable and Drip Lines NUCLEAR STRUCTURE 34,40,48,60Ca, 90Zr, 208Pb; calculated giant monopole strength distributions, related features. Hartree-Fock, RPA calculations, Skyrme interactions.
doi: 10.1103/PhysRevC.56.3121
1997RO13 Nucl.Phys. A624, 225 (1997) C.Rossi Alvarez, C.M.Petrache, D.R.Napoli, D.Bazzacco, S.Lunardi, N.H.Medina, R.Menegazzo, P.Pavan, R.Venturelli, C.Fahlander, I.Hamamoto Decay Out of the Highly Deformed Bands in the N = 75 Isotones 137Sm and 139Gd NUCLEAR REACTIONS 104Pd(37Cl, 3np), E=172 MeV; 92Mo(50Cr, n2p), E=220 MeV; measured Eγ, Iγ, γγ-coin. 137Sm, 139Gd deduced high-spin levels, J, π, band structure, configuration, deformation features.
doi: 10.1016/S0375-9474(97)81836-2
1996HA02 Phys.Rev. C53, 765 (1996) I.Hamamoto, H.Sagawa, X.Z.Zhang Single-Particle and Collective Properties of Drip-Line Nuclei NUCLEAR STRUCTURE 110Ni, 100,120Sn, 120Sr; calculated Hartree-Fock density, Hartree-Fock potential vs r. 110Ni, 100Sn; calculated isoscalar, isovector monopole, isovector dipole, isoscalar quadrupole modes strength functions. Hartree-Fock with Skyrme interactions, RPA.
doi: 10.1103/PhysRevC.53.765
1996HA10 Phys.Rev. C53, R1492 (1996) Low Energy Strength in Low-Multipole Response Function of Nuclei Near the Neutron Drip Line NUCLEAR STRUCTURE 28O; calculated Hartree-Fock single-particle energies, <r2>, <r4>, isoscalar, isovector monopole, isovector dipole transition strength function. Hartree-Fock plus RPA with Skyrme interaction.
doi: 10.1103/PhysRevC.53.R1492
1996HA36 Phys.Rev. C54, 2369 (1996) Core Polarization Charges of Quadrupole Transitions in Neutron Drip Line Nuclei NUCLEAR STRUCTURE 28O; calculated isoscalar, isovector quadrupole mode strength function, single nucleon core polarization charges, B(λ), radial transition densities. Particle-vibration coupling model, Hartree-Fock single particle wave functions, RPA response functions.
doi: 10.1103/PhysRevC.54.2369
1995DO08 Phys.Lett. 345B, 181 (1995) Isospin Impurities in Ground States of N = Z Nuclei Near the Proton-Drip Line NUCLEAR STRUCTURE 56Ni, 64Ge, 76Sr, 80Zr, 100Sn; calculated isospin mixing probabilities. Deformed Hartree-Fock solutions, Skyrme interaction.
doi: 10.1016/0370-2693(94)01634-O
1995FR19 Phys.Rev. C52, 2468 (1995) F.Frisk, I.Hamamoto, X.Z.Zhang Gamow-Teller β+ Decay of Deformed Nuclei Near the Proton Drip Line NUCLEAR STRUCTURE Z=28-66; calculated β+-decay associated Gamow-Teller transition strength. Deformed Hartree-Fock based quasiparticle TDA, Skyrme interactions.
doi: 10.1103/PhysRevC.52.2468
1995HA30 Phys.Rev. C52, R2326 (1995) Neutron Skin of Nuclei Near the Neutron Drip Line NUCLEAR STRUCTURE 152Dy; analyzed Hartree-Fock minima density distribution at superdeformed shape. A=152; A=178; A=208; calculated one-neutron levels vs N=78-110, 94-126, 118-142 respectively; deduced neutron skin related features. Skyrme type deformed Hartree-Fock calculations.
doi: 10.1103/PhysRevC.52.R2326
1995HA36 Phys.Scr. T56, 27 (1995) ΔI = 4 Structure in Superdeformed Rotational Band - Deformation with C(4v) NUCLEAR STRUCTURE A=120; A=100; A=90; analyzed yrast quartet splittings for C(4v) Hamiltonian, other aspects, superdeformed bands; deduced ΔI=4 structure related features, model parameters characteristics.
doi: 10.1088/0031-8949/1995/T56/004
1995HA39 Z.Phys. A353, 145 (1995) Dependence of Gamow-Teller β+-Decay of 80Zr, 76Sr and 72Kr on Nuclear Shape NUCLEAR STRUCTURE 80Zr, 76Sr, 72Kr; calculated Gamow-Teller β+-decay probability. Skyrme-type deformed Hartree-Fock calculation based quasiparticle TDA.
doi: 10.1007/BF01295892
1994DO02 Phys.Rev.Lett. 72, 981 (1994) J.Dobaczewski, I.Hamamoto, W.Nazarewicz, J.A.Sheikh Nuclear Shell Structure at Particle Drip Lines NUCLEAR STRUCTURE 100Sn, 100Zn; calculated nucleon densities, central potentials radial dependences. A=120; calculated single particles levels for isobars. Self-consistent mean-field theory.
doi: 10.1103/PhysRevLett.72.981
1994DO19 Acta Phys.Pol. B25, 541 (1994) J.Dobaczewski, I.Hamamoto, W.Nazarewicz, J.A.Sheikh Nuclear Structure at Particle Drip Lines NUCLEAR STRUCTURE 100,118,132,150Sn; calculated single particle nucleonic densities. A=100, 120, 150; calculated single particle levels. A=94-110; calculated Q(EC) for Ru, PD, Cd, Sn isotopes. 76,78,80,82Sr; calculated levels. Mean field approach.
1994FR20 Phys.Scr. 50, 628 (1994) Quadrupole-Octupole Deformation in Finite Fermion System NUCLEAR STRUCTURE N=138-186; analyzed quadrupole-octupole deformation features; deduced nonaxially-symmetric Y33 deformation superposed on prolate or oblate deformation role. Two-level, modified oscillator models.
doi: 10.1088/0031-8949/50/6/005
1994HA13 Phys.Rev. C49, 2489 (1994) K(π) = 1+ Pairing Interaction and Moments of Inertia of Superdeformed Rotational Bands in Atomic Nuclei NUCLEAR STRUCTURE 194Hg; calculated Migdal to cranking moment of inertia ratio; deduced K(π)=1+ pairing role on moments of inertia frequency dependence at superdeformed shapes.
doi: 10.1103/PhysRevC.49.2489
1994HA18 Phys.Rev. C49, 3352 (1994) Comment on ' Orbital M1 Versus E2 Strength in Deformed Nuclei: A new energy-weighted sum rule '
doi: 10.1103/PhysRevC.49.3352
1994HA22 Phys.Lett. 324B, 273 (1994) Dynamical Moments of Inertia at Normal Deformation in Neighbouring Odd and Even-Even Nuclei NUCLEAR STRUCTURE 157,159,161,163Ho, 159,161,163,165,167,169Tm, 163,165,167,169,171,173,175Lu, 171,173,175,177,179,181Ta, 177,179,181,183,185Re; calculated dynamical moments of inertia fractional changes. Cranking HFB calculations.
doi: 10.1016/0370-2693(94)90193-7
1994HA39 Nucl.Phys. A577, 19c (1994) Beta Decay to Gamow-Teller Giant Resonances in Drip-Line Nuclei NUCLEAR STRUCTURE 8He, 14,20,22C; calculated Gamow-Teller β-decay strength. 14,20,22C, 8He, 22,24,28O; calculated Gamow-Teller ground state, IAS energies. Hartree-Fock plus RPA.
doi: 10.1016/0375-9474(94)90828-1
1994HA46 Phys.Lett. 333B, 294 (1994) Superdeformed Rotational Bands in the Presence of Y44 Deformation
doi: 10.1016/0370-2693(94)90144-9
1994NA09 Nucl.Phys. A573, 333 (1994) T.Nakatsukasa, K.Matsuyanagi, I.Hamamoto, W.Nazarewicz Low-Energy M1 and E3 Excitations in the Proton-Rich Kr-Zr Region NUCLEAR STRUCTURE 76,78,80,82Sr, 72,74,76,78,80Kr, 80,82Zr; calculated levels, B(λ). Quasiparticle RPA.
doi: 10.1016/0375-9474(94)90348-4
1993HA11 Phys.Rev. C47, 2008 (1993) G.B.Hagemann, I.Hamamoto, W.Satula Electric-Dipole Transitions and Octupole Softness in Odd-A Rare-Earth Nuclei NUCLEAR STRUCTURE 157Ho, 165,167Tm, 169,171,173Lu, 163Er, 163,165,167Yb, 177Hf; calculated levels, B(λ), Eγ; deduced octupole softness role. One quasiparticle coupled to axially symmetric rotor.
doi: 10.1103/PhysRevC.47.2008
1993HA22 Nucl.Phys. A557, 515c (1993) Octupole Softness and Electric-Dipole Transitions in Yrast Spectroscopy NUCLEAR STRUCTURE 177Hf, 169Lu; compiled, reviewed B(λ) model analyses; deduced E1 transition hindrance factor related features.
doi: 10.1016/0375-9474(93)90566-G
1993HA23 Phys.Rev. C48, R960 (1993) Gamow-Teller Beta Decay and Isospin Impurity in Nuclei Near the Proton Drip Line NUCLEAR STRUCTURE 56Ni, 64Ge, 76Sr, 78Zr, 100,106Sn; calculated Gamow-Teller transition strength nonenergy weighted sum rule percentage. 12C, 16O, 40Ca, 56Ni, 64Ge, 76Sr, 80Zr, 100Sn; calculated isospin mixing probabilities. Hartree-Fock plus TDA approximation.
doi: 10.1103/PhysRevC.48.R960
1993OG01 Nucl.Phys. A559, 100 (1993) S.Ogaza, J.Kownacki, M.P.Carpenter, J.Gascon, G.B.Hagemann, Y.Iwata, H.J.Jensen, T.Komatsubara, J.Nyberg, G.Sletten, P.O.Tjom, W.Walus, I.Hamamoto Shapes, Electromagnetic Properties and Enhanced E1 Strength in 169Lu NUCLEAR REACTIONS 154Sm(19F, 4n), E=85 MeV; measured Eγ, γγ-coin, Iγ, DSA. 169Lu deduced levels, Iγ, rotational band-structure, configuration-dependent shape, pairing, T1/2, transition quadrupole moments, B(M1)/B(E2), B(E1). Comparison to particle-rotor calculations including octupole softness. Enriched target, array of Compton suppressed Ge-detectors.
doi: 10.1016/0375-9474(93)90182-W
1993SA16 Phys.Lett. 303B, 215 (1993) H.Sagawa, I.Hamamoto, M.Ishihara Gamow-Teller States in Light Nuclei Near the Neutron Drip Line NUCLEAR STRUCTURE 12C; calculated Hartree-Fock single-particle energies. 14,20,22C, 22,24,28O; calculated Gamow-Teller β-decay strength. Hartree-Fock plus RPA(TDA) calculations.
doi: 10.1016/0370-2693(93)91422-J
1992DR03 Nucl.Phys. A543, 495 (1992) S.Drissi, A.Bruder, M.Carlen, J.Cl.Dousse, M.Gasser, J.Kern, S.J.Mannanal, B.Perny, Ch.Rheme, J.L.Salicio, J.P.Vorlet, I.Hamamoto Signature Inversion and Electromagnetic Properties of Aligned Bands in 166Tm NUCLEAR REACTIONS 165Ho(α, 3n), E=32.6-47.9 MeV; measured Eγ, Iγ, σ(E, Eγ, θ), γγ-coin, γ(t). 166Tm deduced levels, J, K, π, T1/2, B(M1)/B(E2) ratios. Germanium detectors, on-line curved crystal spectrometer.
doi: 10.1016/0375-9474(92)90277-Q
1992HA23 Phys.Rev. C46, 838 (1992) Interaction Strength of Two Crossing Bands NUCLEAR STRUCTURE 156Dy, 158,160,164Er, 160,162,164,166Yb, 164,166Hf; analyzed level data; deduced crossing band interaction strength. 155,157,159,161Dy, 157,159,161,163,165Er, 161,163,165,167Yb, 167,169,171Hf; analyzed level energy difference data. 157Ho deduced band interaction strength dependence on n-p interaction details.
doi: 10.1103/PhysRevC.46.838
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