125 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Kyushu UniversityJP22 papers
- Japan Aerospace Exploration AgencyJP17 papers
- Fukuoka UniversityJP16 papers
- Institute of Space and Astronautical ScienceJP16 papers
- Goddard Space Flight CenterUS15 papers
- University of MichiganUS15 papers
- Kyoto UniversityJP14 papers
- Lawrence Livermore National LaboratoryUS14 papers
- Massachusetts Institute of TechnologyUS14 papers
- Rikkyo UniversityJP14 papers
- Space Research Organisation NetherlandsNL14 papers
- The University of TokyoJP14 papers
29 papers · 1 filter
Neutron skin of 48Ca deduced from interaction cross section
Masayuki Matsuzaki, Masanobu Yahiro
The neutron skin thickness of 48Ca was deduced from the interaction cross section by adopting a microscopic optical potential. The optical potential used was constructed by folding…
Neutron skin thickness of Pb, Sn, and Ca determined from reaction cross sections of He scattering
Masayuki Matsuzaki, Shingo Tagami, Masanobu Yahiro
[Background] We constructed the Kyushu chiral -matrix and confirmed its reliability at ~MeV and ~MeV…
Quadrupole and monopole transition properties of in Gd isotopes
Masayuki Matsuzaki, Tomoya Ueno
The longstanding problem of characterization of the states in Gd isotopes is revisited by adopting the NilssonBCS mean field and the random-phase approximation. The inte…
Changes in rotational characters of one- and two-phonon -vibrational bands in Mo
Masayuki Matsuzaki
The vibration is the most typical low-lying collective motion prevailing the nuclear chart. But only few one-phonon rotational bands in odd- nuclei have been known. Furtherm…
Single-phonon and multi-phonon excitations of the vibration in rotating odd- nuclei
Masayuki Matsuzaki
Multi-phonon excitations in atomic nuclei were observed very rarely although collective motions in quantum many-body systems are described as bosonic excitations. In particular, th…
Recursion Method for Deriving Energy-Independent Effective Interaction
Kenji Suzuki, Hiroo Kumagai, Ryoji Okamoto +1
The effective-interaction theory has been one of the useful and practical methods for solving nuclear many-body problems based on the shell model. Various approaches have been prop…
Formulation of effective interaction in terms of renormalized vertices and propagators
Kenji Suzuki, Hiroo Kumagai, Masayuki Matsuzaki +1
One of the useful and practical methods for solving quantum-mechanical many-body systems is to recast the full problem into a form of the effective interaction acting within a mode…
Two-phonon -vibrational states in rotating triaxial odd- nuclei
Masayuki Matsuzaki
Distribution of the two phonon vibrational collectivity in the rotating triaxial odd- nucleus, Nb, that is one of the three nuclides for which experimental data were…
Parametrizations of triaxial deformation and E2 transitions of the wobbling band
Yoshifumi R. Shimizu, Takuya Shoji, Masayuki Matsuzaki
By the very definition the triaxial deformation parameter is related to the expectation values of the K=0 and K=2 components of the intrinsic quadrupole tensor operator. On the…
Tilting instability in negative-γrotating nuclei
Masayuki Matsuzaki
Based on the cranking model and the random phase approximation, we point out that the wobbling excitation on top of the s band in ^{182}Os is stable against angular momentum tiltin…
Wobbling motion in triaxial superdeformed nuclei
Masayuki Matsuzaki, Yoshifumi R. Shimizu, Kenichi Matsuyanagi
We discuss some characteristic features of the wobbling motion excited on the triaxial superdeformed Lu nucleus. We show how these features are connected to the moments of inertia…
Chiral phase transition in an extended NJL model with higher-order multi-quark interactions
Kouji Kashiwa, Hiroaki Kouno, Tomohiko Sakaguchi +2
The chiral phase transition is studied in an extended Nambu--Jona-Lasinio model with eight-quark interactions. Equations for scalar and vector quark densities, derived in the mean…
Liquid-gas instability and superfluidity in nuclear matter
Masayuki Matsuzaki
We study effects of the medium polarization on superfluidity in symmetric nuclear matter in a relativistic formalism. An effect of the liquid-gas instability is emphasized. We exam…
Precession Mode on High-K Configurations: Non-Collective Axially-Symmetric Limit of Wobbling Motion
Yoshifumi R. Shimizu, Masayuki Matsuzaki, Kenichi Matsuyanagi
We have studied the precession mode, the rotational excitation built on the high- isomeric state, in comparison with the recently identified wobbling mode. The random-phase-appr…
High-K Precession modes: Axially symmetric limit of wobbling motion
Yoshifumi R. Shimizu, Masayuki Matsuzaki, Kenichi Matsuyanagi
The rotational band built on the high-K multi-quasiparticle state can be interpreted as a multi-phonon band of the precession mode, which represents the precessional rotation about…
^{1}S_{0} proton superfluidity in neutron star matter: Impact of bulk properties
Tomonori Tanigawa, Masayuki Matsuzaki, Satoshi Chiba
We study the ^{1}S_{0} proton pairing gap in neutron star matter putting emphasis on influence of the Dirac effective mass and the proton fraction on the gap within the relativisti…
Nuclear moments of inertia and wobbling motions in triaxial superdeformed nuclei
Masayuki Matsuzaki, Yoshifumi R. Shimizu, Kenichi Matsuyanagi
The wobbling motion excited on triaxial superdeformed nuclei is studied in terms of the cranked shell model plus random phase approximation. Firstly, by calculating at a low rotati…
Instability of nuclear wobbling motion and tilted axis rotation
Masayuki Matsuzaki, Shin-Ichi Ohtsubo
We study a possible correspondence between the softening of the wobbling mode and the "phase transition" of the one-dimensionally rotating mean field to a three-dimensionally rotat…
Possibility of ΛΛpairing and its dependence on background density in relativistic Hartree-Bogoliubov model
Tomonori Tanigawa, Masayuki Matsuzaki, Satoshi Chiba
We calculate a ΛΛpairing gap in binary mixed matter of nucleons and Λhyperons within the relativistic Hartree-Bogoliubov model. Lambda hyperons to be paired up are immersed in back…
Wobbling Motion in Atomic Nuclei with Positive-Gamma Shapes
Masayuki Matsuzaki, Yoshifumi R. Shimizu, Kenichi Matsuyanagi
The three moments of inertia associated with the wobbling mode built on the superdeformed states in 163Lu are investigated by means of the cranked shell model plus random phase app…
Relativistic mean field description for the shears band mechanism in Rb
Hideki Madokoro, Jie Meng, Masayuki Matsuzaki +1
For the first time, the Relativistic Mean Field (RMF) model is applied to the shears band recently observed in Rb. Signals of the appearance of the shears mechanism, su…
Constructing Effective Pair Wave Function from Relativistic Mean Field Theory with a Cutoff
Tomonori Tanigawa, Masayuki Matsuzaki
We propose a simple method to reproduce the ^1S_0 pairing properties of nuclear matter, which are obtained using a sophisticated model, by introducing a density-independent cutoff…
Phenomenological construction of a relativistic nucleon-nucleon interaction for the superfluid gap equation in finite density systems
Masayuki Matsuzaki, Tomonori Tanigawa
We construct phenomenologically a relativistic particle-particle channel interaction which suits the gap equation for nuclear matter. This is done by introducing a density-independ…
Effect of Vector Meson Mass Decrease on Superfluidity in Nuclear Matter
Tomonori Tanigawa, Masayuki Matsuzaki
pairing in nuclear matter is investigated by taking the hadron mass decrease into account via the ``In-Medium Bonn potential'' which was recently proposed by Rapp et al. Th…