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NSR database version of May 24, 2024.

Search: Author = M.Yamagami

Found 30 matches.

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2022YA25      Phys.Rev. C 106, 044316 (2022)


Momentum-space structure of dineutrons in Borromean nuclei

NUCLEAR STRUCTURE 6He, 11Li, 19B, 22C; calculated ground state properties, S(2n), fraction of the neutron and proton configurations, n-n distance, core-2n distance, matter radius, opening angle between momenta of valence neutrons, 2n density distribution. Three-body model calculation with newly constructed finite-range nn interaction in momentum space (the kSEP interaction). Comparison to experimental data.

doi: 10.1103/PhysRevC.106.044316
Citations: PlumX Metrics

2019YA21      Phys.Rev. C 100, 054302 (2019)


Pairing effect on Kπ = 0+ quadrupole excitations in neutron-rich Mg isotopes studied by Skyrme quasiparticle random-phase approximation calculations in wave-number space

NUCLEAR STRUCTURE 34,36,38,40,42,44Mg; calculated quadrupole deformation, pairing gap, neutron single particle energies, QRPA strength distributions isoscalar transition matrix elements, excitation energies, neutron chemical potential, one-body matrix elements for Kπ=0+ quadrupole excitations using the quasiparticle random-phase approximation (QRPA) method, with the Skyrme energy density functional (EDF) in three-dimensional wave-number space.

doi: 10.1103/PhysRevC.100.054302
Citations: PlumX Metrics

2012YA12      Phys.Rev. C 86, 034333 (2012)

M.Yamagami, J.Margueron, H.Sagawa, K.Hagino

Isoscalar and isovector density dependence of the pairing functional determined from global fitting

NUCLEAR STRUCTURE N>8, Z>8; calculated pair-density functional (pair-DF) with isoscalar and isovector density dependences using experimental neutron and proton pairing gaps for even-even nuclides of N, Z>8.

doi: 10.1103/PhysRevC.86.034333
Citations: PlumX Metrics

2011NA10      Phys.Rev. C 83, 031302 (2011)

H.Nakada, M.Yamagami

Coulombic effect and renormalization in nuclear pairing

NUCLEAR STRUCTURE Z=10-26, N=20; Z=14-30, N=28; Z=22-48, N=50; Z=46-72, N=82; Z=64-94, N=126; calculated nuclear pairing energies, even-odd mass differences for even-even neutron-closed shell nuclei using Hartree-Fock-Bogolyubov approach and Gogny-D1S plus Coulomb interaction. Effect of the Coulomb force on the nuclear pairing properties.

doi: 10.1103/PhysRevC.83.031302
Citations: PlumX Metrics

2009NA35      Nucl.Phys. A828, 283 (2009)

H.Nakada, K.Mizuyama, M.Yamagami, M.Matsuo

RPA calculations with Gaussian expansion method

NUCLEAR STRUCTURE 40,48,60Ca; calculated excitation energy and transition strength. Comparison of several methods.

doi: 10.1016/j.nuclphysa.2009.07.010
Citations: PlumX Metrics

2009OG01      Prog.Theor.Phys.(Kyoto) 121, 357 (2009)

H.Ogasawara, K.Yoshida, M.Yamagami, S.Mizutori, K.Matsuyanagi

Rotational Frequency Dependence of Octupole Vibrations on Superdeformed States in 40Ca

doi: 10.1143/PTP.121.357
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2009YA20      Phys.Rev. C 80, 064301 (2009)

M.Yamagami, Y.R.Shimizu, T.Nakatsukasa

Optimal pair density functional for the description of nuclei with large neutron excess

NUCLEAR STRUCTURE A=118-196; calculated proton and neutron pairing gaps and rms deviations using Hartree-Fock-Bogoliubov (HFB) method for 156 nuclei in the A=118-196 range and with (N-Z)/A<0.25. Optimization of parameters in the pair density-functional (DF) for large neutron excess nuclei. Comparison with experimental data.

doi: 10.1103/PhysRevC.80.064301
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2008OG02      Prog.Theor.Phys.(Kyoto) 120, 1169 (2008)

H.Ogasawara, K.Yoshida, M.Yamagami, S.Mizutori, K.Matsuyanagi

Triaxiality Dependence of Octupole Excitations on Superdeformed States in 44Ti

doi: 10.1143/PTP.120.1169
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2008YA08      Phys.Rev. C 77, 034315 (2008)

T.Yamaguchi, T.Suzuki, T.Ohnishi, F.Becker, M.Fukuda, H.Geissel, M.Hosoi, R.Janik, K.Kimura, T.Kuboki, S.Mandel, M.Matsuo, G.Munzenberg, S.Nakajima, T.Ohtsubo, A.Ozawa, A.Prochazka, M.Shindo, B.Sitar, P.Strmen, T.Suda, K.Summerer, K.Sugawara, I.Szarka, M.Takechi, A.Takisawa, K.Tanaka, M.Yamagami

Nuclear matter radii of neutron-deficient Kr isotopes

NUCLEAR REACTIONS C(72Kr, X), (76Kr, X), (80Kr, X), E=1.05 GeV/nucleon; measured interaction cross sections, effective matter radii. 63,64,65,66,67,68Ga, 65,66,67,68,69,70Ge, 67,68,69,70,71,72As, 69,70,71,72,73Se, 72,73,74,75Br, 73,74,75,77,78,79,81,82,83,84,85,86,87,88,89,90Kr; systematics. Comparison with Skyrme-Hartree-Fock-Bogoliubov calculations.

doi: 10.1103/PhysRevC.77.034315
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2008YA14      Phys.Rev. C 77, 064319 (2008)

M.Yamagami, Y.R.Shimizu

Pairing effects for rotational excitations unique to neutron-rich nuclei

NUCLEAR STRUCTURE 30,32,34,36,38,40Mg; calculated neutron and proton pairing gaps, neutron moments of inertia, excitation energies of 2+ states. 60,62,64,66,68,70,72,74,76,78Cr; calculated neutron and proton pairing gaps, excitation energies of 2+ states. 40Mg; calculated neutron correlation densities. Hartree-Fock-Bogoliubov model.

doi: 10.1103/PhysRevC.77.064319
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2008YO02      Phys.Rev. C 77, 044312 (2008)

K.Yoshida, M.Yamagami

Low-frequency Kπ = 0+ modes in deformed neutron-rich nuclei: Pairing- and β-vibrational modes of neutrons

NUCLEAR STRUCTURE 34,40Mg, 62,64,66,68,70Cr, 64,66,68,70,72Fe; calculated single-particle energies, excitation energies, transition densities. QPRA amplitudes, B(E2), isoscalar quadrupole, monopole pair and quadrupole pair transition strengths for Kπ=0+ states. Quasiparticle random phase approximation, Hartree-Fock-Bogoliubov formalism.

doi: 10.1103/PhysRevC.77.044312
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2006HA28      Phys.Rev. C 74, 017310 (2006)

K.Hagino, N.W.Lwin, M.Yamagami

Deformation parameter for diffuse density

NUCLEAR STRUCTURE 24,26,28,30,32,34,36,38,40Mg; calculated deformation and diffuseness parameters.

doi: 10.1103/PhysRevC.74.017310
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2006IN01      Nucl.Phys. A768, 61 (2006)

T.Inakura, H.Imagawa, Y.Hashimoto, S.Mizutori, M.Yamagami, K.Matsuyanagi

Mixed representation RPA calculation for octupole excitations on superdeformed states in the 40Ca and neutron-rich sulfur regions

NUCLEAR STRUCTURE 32,36,48,50S, 36Ar, 40Ca, 44Ti; calculated energy, J, octupole transition strengths for low-frequency negative-parity excitations built on superdeformed states. Self-consistent RPA approach, comparison with other models.

doi: 10.1016/j.nuclphysa.2006.01.008
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2006YA20      Phys.Scr. T125, 228 (2006)


Pairing-induced spatially extended coherence of low-lying vibrational excitations unique in neutron drip line nuclei

NUCLEAR STRUCTURE 80,82,84,86,88Ni; calculated transitions B(E2).

doi: 10.1088/0031-8949/2006/T125/064
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2006YO07      Nucl.Phys. A779, 99 (2006)

K.Yoshida, M.Yamagami, K.Matsuyanagi

Pairing and continuum effects on low-frequency quadrupole vibrations in deformed Mg isotopes close to the neutron drip line

NUCLEAR STRUCTURE 36,38,40Mg; calculated transition strengths for low-frequency quadrupole vibrational modes. Quasiparticle RPA.

doi: 10.1016/j.nuclphysa.2006.09.003
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2006YO09      Phys.Scr. T125, 45 (2006)

K.Yoshida, M.Yamagami, K.Matsuyanagi

Dynamic pairing effects on low-frequency modes of excitation in deformed Mg isotopes close to the neutron drip line

NUCLEAR STRUCTURE 36,38,40Mg; calculated isoscalar quadrupole strength distributions; deduced collective modes, dynamic pairing effects. Deformed quasiparticle RPA.

doi: 10.1088/0031-8949/2006/T125/010
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2005IN02      Eur.Phys.J. A 25, Supplement 1, 545 (2005)

T.Inakura, H.Imagawa, Y.Hashimoto, M.Yamagami, S.Mizutori, K.Matsuyanagi

Soft octupole vibrations on superdeformed states in nuclei around 40Ca suggested by Skyrme-HF and self-consistent RPA calculations

NUCLEAR STRUCTURE 32S, 36Ar, 40Ca, 44Ti; calculated energy, J for low-frequency negative-parity excitations built on superdeformed states. Self-consistent RPA approach.

doi: 10.1140/epjad/i2005-06-111-4
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2005YA27      Eur.Phys.J. A 25, Supplement 1, 569 (2005)


Collective excitations induced by pairing anti-halo effect

NUCLEAR STRUCTURE 86Ni; calculated spatial distribution of neutron two-quasiparticle states. 80,82,84,86,88Ni; calculated transitions B(E2); deduced role of pairing correlations. Quasiparticle RPA.

doi: 10.1140/epjad/i2005-06-130-1
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2005YA28      Eur.Phys.J. A 25, Supplement 1, 573 (2005)

M.Yamagami, N.Van Giai

Pairing effects on the collectivity of quadrupole states around 32Mg

NUCLEAR STRUCTURE 30Ne, 32Mg, 34Si, 36S, 38Ar, 40Ca; calculated neutron pair gaps, level energies, transitions B(E2). HFB plus quasiparticle RPA.

doi: 10.1140/epjad/i2005-06-095-y
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2005YA31      Phys.Rev. C 72, 064308 (2005)


Continuum effects for many-body correlations in nuclei close to the neutron drip line

NUCLEAR STRUCTURE 80,82,84,86,88Ni; calculated single-particle energies, radii, B(E2), role of pair correlations.

doi: 10.1103/PhysRevC.72.064308
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2005YO03      Prog.Theor.Phys.(Kyoto) 113, 1251 (2005)

K.Yoshida, M.Yamagami, K.Matsuyanagi

Comparative Study of Octupole Excitations on Superdeformed States in 32S, 36S, 40Ca and 50S

NUCLEAR STRUCTURE 32,36,50S, 40Ca; calculated superdeformed band energies, configurations, isoscalar octupole strength. RPA approach, deformed Woods-Saxon potential.

doi: 10.1143/PTP.113.1251
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2005YO13      Eur.Phys.J. A 25, Supplement 1, 557 (2005)

K.Yoshida, T.Inakura, M.Yamagami, S.Mizutori, K.Matsuyanagi

Microscopic structure of negative-parity vibrations built on superdeformed states in sulfur isotopes close to the neutron drip line

NUCLEAR STRUCTURE 50S; calculated isoscalar octupole transition strengths, neutron density distributions, superdeformed states features. Woods-Saxon potential, RPA.

doi: 10.1140/epjad/i2005-06-142-9
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2004IN01      Int.J.Mod.Phys. E13, 157 (2004)

T.Inakura, M.Yamagami, K.Matsuyanagi, S.Mizutori, H.Imagawa, Y.Hashimoto

Static and dynamic non-axial octupole deformations suggested by Skyrme-HF and selfconsistent RPA calculations

NUCLEAR STRUCTURE 32,34,36,38,40,42,44,46,48,50S, 36Ar, 40Ca, 44Ti, 48Cr; calculated deformation energy curves. 32,36,48,50S; calculated levels, J, π, transition matrix elements. Skyrme-Hartree-Fock and RPA calculations.

doi: 10.1142/S0218301304001886
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2004VA25      Yad.Fiz. 67, 1660 (2004); Phys.Atomic Nuclei 67, 1633 (2004)

N.Van Giai, M.Yamagami

QRPA Coordinate Space Calculations of 2+ States in N = 20 Isotones

NUCLEAR STRUCTURE 30Ne, 32Mg, 34Si, 36S, 38Ar; calculated excitation energies for first 2+ states, B(E2), isoscalar quadrupole strength functions. Quasiparticle RPA approach.

doi: 10.1134/1.1802349
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2004YA06      Phys.Rev. C 69, 034301 (2004)

M.Yamagami, N.Van Giai

Pairing effects on the collectivity of quadrupole states around 32Mg

NUCLEAR STRUCTURE 30Ne, 32Mg, 34Si, 36S, 38Ar, 40Ca; calculated single-particle level energies, pairing effects, transitions B(E2), quadrupole strength functions. Quasiparticle RPA, Skyrme interactions.

doi: 10.1103/PhysRevC.69.034301
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2003IN03      Nucl.Phys. A728, 52 (2003)

T.Inakura, S.Mizutori, M.Yamagami, K.Matsuyanagi

Superdeformed bands in neutron-rich sulfur isotopes suggested by cranked Skyrme-Hartree-Fock calculations

NUCLEAR STRUCTURE 32,34,36,38,40,42,44,46,48,50S, 38Ar; calculated potential energy vs deformation. 32,36,50S deduced superdeformed configurations. Cranked Skyrme-Hartree-Fock approach.

doi: 10.1016/j.nuclphysa.2003.08.012
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2002IN04      Nucl.Phys. A710, 261 (2002)

T.Inakura, S.Mizutori, M.Yamagami, K.Matsuyanagi

Cranked Skyrme-Hartree-Fock calculation for superdeformed and hyperdeformed rotational bands in N = Z nuclei from 32S to 48Cr

NUCLEAR STRUCTURE 32S, 36Ar, 40Ca, 44Ti, 48Cr; calculated rotational bands deformation, related features. 32S, 36Ar, 40Ca, 44Ti; deduced superdeformed bands. 36Ar, 40Ca, 44Ti, 48Cr; deduced hyperdeformed bands. 40Ca deduced octupole softness. Symmetry-unrestricted cranked Skyrme-Hartree-Fock method.

doi: 10.1016/S0375-9474(02)01164-8
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2002IN06      Prog.Theor.Phys.(Kyoto), Suppl. 146, 567 (2002)

T.Inakura, M.Yamagami, S.Mizutori, K.Matsuyanagi

Cranked Skyrme-Hartree-Fock Calculations for Superdeformed and Hyperdeformed Bands in N = Z Nuclei 32S, 36Ar, 40Ca, and in Neutron Rich Nuclei, 14Be, 26Ne, 46S

NUCLEAR STRUCTURE 32,46S, 36Ar, 40Ca, 44Ti, 48Cr; calculated superdeformed and hyperdeformed bands energy vs spin. Cranked Skyrme-Hartree-Fock approach.

doi: 10.1143/PTPS.146.567
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2001YA15      Nucl.Phys. A693, 579 (2001)

M.Yamagami, K.Matsuyanagi, M.Matsuo

Symmetry-Unrestricted Skyrme-Hartree-Fock-Bogoliubov Calculations for Exotic Shapes in N = Z Nuclei from 64Ge to 84Mo

NUCLEAR STRUCTURE 64Ge, 68Se, 72Kr, 76Sr, 80Zr, 84Mo; calculated deformation parameters; deduced shape coexistence, nonaxial octupole deformation. Symmetry-unrestricted Skyrme-Hartree-Fock-Bogoliubov calculations.

doi: 10.1016/S0375-9474(01)00918-6
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2000YA14      Nucl.Phys. A672, 123 (2000)

M.Yamagami, K.Matsuyanagi

High-Spin Yrast Structure of 32S Suggested by Symmetry-Unrestricted, Cranked Hartree-Fock Calculations

NUCLEAR STRUCTURE 32S; calculated high-spin rotational bands excitation energy vs spin, deformation, related features; deduce hyperdeformation, non-axial octupole deformation. Symmetry-unrestricted, cranked Hartree-Fock calculations.

doi: 10.1016/S0375-9474(99)00391-7
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