288 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of TsukubaJP49 papers
- Fermi National Accelerator LaboratoryUS44 papers
- University of New MexicoUS44 papers
- Tufts UniversityUS43 papers
- University of LiverpoolGB42 papers
- Waseda UniversityJP42 papers
- Massachusetts Institute of TechnologyUS41 papers
- Okayama UniversityJP41 papers
- University of California, DavisUS41 papers
- University of OxfordGB41 papers
- Yale UniversityUS41 papers
- Academia SinicaTW40 papers
24 papers · 1 filter
Roles of Antinucleon Degrees of Freedom in the Relativistic Random Phase Approximation
Haruki Kurasawa, Toshio Suzuki
Roles of antinucleon degrees of freedom in the relativistic random phase approximation(RPA) are investigated. The energy-weighted sum of the RPA transition strengths is expressed i…
Analytical formula for numerical evaluations of the Wigner rotation matrices at high spins
Naoki Tajima
The Wigner d function, which is the essential part of an irreducible representation of SU(2) and SO(3) parameterized with Euler angles, has been know to suffer from a serious numer…
Nuclear prolate-shape dominance with the Woods-Saxon potential
S. Takahara, N. Tajima, Y. R. Shimizu
We study the prolate-shape predominance of the nuclear ground-state deformation by calculating the masses of more than two thousand even-even nuclei using the Strutinsky method, mo…
Method to circumvent the neutron gas problem in the BCS treatment for nuclei far from stability
Toshiya Ono, Yoshifumi R. Shimizu, Naoki Tajima +1
Extending the Kruppa's prescription for the continuum level density, we have recently improved the BCS method with seniority-type pairing force in such a way that the effects of di…
Improved microscopic-macroscopic approach incorporating the effects of continuum states
Naoki Tajima, Yoshifumi R. Shimizu, Satoshi Takahara
The Woods-Saxon-Strutinsky method (the microscopic-macroscopic method) combined with Kruppa's prescription for positive energy levels, which is necessary to treat neutron rich nucl…
Sum Rules of the Multiple Giant Dipole States
H. Kurasawa, T. Suzuki, P. F. Bortignon
Various sum rules for multiple giant dipole resonance states are derived. For the triple giant dipole resonance states, the energy-weighted sum of the transition strengths requires…
Continuum effects on the pairing in neutron drip-line nuclei studied with the canonical-basis HFB method
Naoki Tajima
The canonical-basis HFB method provides an efficient way to describe pairing correlations involving the continuum part of the single-particle spectrum in coordinate-space represent…
Nodal Lines in the Cranked HFB Overlap kernels
Makito Oi, Naoki Tajima
Norm overlap kernels of the cranked Hartree-Fock-Bogoliubov states are studied in the context of angular momentum projection. In particular, the geometrical distribution of nodal l…
Role of the Landau-Migdal Parameters with the Pseudovector and the Tensor Coupling in Relativistic Nuclear Models -- The Quenching of the Gamow-Teller Strength --
Tomoyuki Maruyama, Haruki Kurasawa, Toshio Suzuki
Role of the Landau-Migdal parameters with the pseudovector () and the tensor coupling () is examined for the giant Gamow-Teller (GT) states in the relativistic random pha…
The Energy-Weighted and Non Energy-Weighted Gamow-Teller Sum Rules in Relativistic Random Phase Approximation
Haruki Kurasawa, Toshio Suzuki
The non energy-weighted Gamow-Teller(GT) sum rule is satisfied in relativistic models, when all nuclear density-dependent terms, including Pauli blocking terms from nucleon-antinuc…
The Gamow-Teller Resonance in Finite Nuclei in the Relativistic Random Phase Approximation
Zhong-Yu Ma, Bao-Qiu Chen, Nguyen Van Giai +1
Gamow-Teller(GT) resonances in finite nuclei are studied in a fully consistent relativistic random phase approximation (RPA) framework. A relativistic form of the Landau-Migdal con…
Hartree-Fock+BCS approach to unstable nuclei with the Skyrme force
Naoki Tajima
We reanalyze the results of our extensive Hartree-Fock + BCS calculation from new points of view paying attention to the properties of unstable nuclei. The calculation has been don…
Canonical-basis solution of the Hartree-Fock-Bogoliubov equation on three-dimensional Cartesian mesh
Naoki Tajima
A method is presented to obtain the canonical-form solutions of the HFB equation for atomic nuclei with zero-range interactions like the Skyrme force. It is appropriate to describe…
The Gamow-Teller States in Relativistic Nuclear Models
Haruki Kurasawa, Toshio Suzuki, Nguyen Van Giai
The Gamow-Teller(GT) states are investigated in relativistic models. The Landau-Migdal(LM) parameter is introduced in the Lagrangian as a contact term with the pseudo-vector coupli…
The role of the Dirac sea in the quenching of Gamow-Teller strength
Haruki Kurasawa, Toshio Suzuki, Nguyen Van Giai
The issue of Gamow-Teller sum rule in atomic nuclei is reexamined in the framework of a relativistic description of nuclei. It is shown that the total Gamow-Teller strength in the…
Relativistic vs. Non-relativistic Nuclear Models
H. Kurasawa, T. Suzuki
Both the relativistic and non-relativistic model explain very well low-energy nuclear phenomena, but in a physically different way from each other. There seems to be no low-energy…
A self-consistent quantal description of high-K states in the tilted-axis cranking model
Makito Oi, Philip M. Walker, Ahmad Ansari
A self-consistent and quantal description of high- bands is given in the framework of the tilted-axis cranking model. (With a tilt angle with respect to -axis,…
Prolate dominance of nuclear shape caused by a strong interference between the effects of spin-orbit and l^2 terms of the Nilsson potential
Naoki Tajima, Norifumi Suzuki
The origin of the dominance of prolate shapes over oblate ones of the ground states of atomic nuclei is investigated with the Nilsson-Strutinsky method. The number of prolate nucle…
Shape coexistence and tilted-axis rotation in neutron-rich hafnium isotopes
Makito Oi, Philip M. Walker, Ahmad Ansari
We have performed tilted-axis-cranked Hartree-Fock-Bogoliubov calculations for a neutron-rich hafnium isotope (Hf) whose proton and neutron numbers are both in the upper sh…
Delta-Hole Interaction in Nuclei and the Gamow-Teller Strength in ^90Nb
Akito Arima, Wolfgang Bentz, Toshio Suzuki
The recently obtained experimental result for the quenching of the GT sum rule in the reaction ^90Zr(p,n)^90Nb is used to extract the value of the Landau-Migdal parameter g_{NΔ}',…
Effects of the Neutron Spin-Orbit Density on Nuclear Charge Density in Relativistic Models
Haruki Kurasawa, Toshio Suzuki
The neutron spin-orbit density contributes to the nuclear charge density as a relativistic effect. The contribution is enhanced by the effective mass stemming from the Lorentz-scal…
Hartree-Fock-Bogoliubov for deformed neutron-rich nuclei
Naoki Tajima
The two-basis method to solve the HFB for deformed nuclei in coordinate space is examined concerning the precision of the density tail. Small cutoff energies are shown to give rise…
Pairing correlation involving the continuum states
Naoki Tajima
The Hartree-Fock-Bogoliubov equation for the ground states of even-even atomic nuclei is solved using the canonical representation in the coordinate space for zero range interactio…
Effects of the Dirac Sea on the Giant Monopole States
Haruki Kurasawa, Toshio Suzuki
Effects of the Dirac sea on the excitation energy of the giant monopole states are investigated in an analytic way within the model. The excitation energy is determined by th…