260 citations · 1.3k across the 48 of their papers we have counts for
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Semiclassical origin of asymmetric nuclear fission: Nascent-fragment shell effect in periodic-orbit theory
K. Arita, T. Ichikawa, K. Matsuyanagi
The origin of the asymmetry in the fragment mass distribution of low-energy nuclear fission is considered from the semiclassical point of view. Using the semiclassical periodic-orb…
Nascent fragment shell effects on the nuclear fission processes in semiclassical periodic orbit theory
Ken-ichiro Arita, Takatoshi Ichikawa, Kenichi Matsuyanagi
Making use of the semiclassical periodic orbit theory (POT), we propose, for the first time, a method to exclusively evaluate the shell effects associated with each of the nascent…
Microscopic derivation of the Bohr-Mottelson collective Hamiltonian and its application to quadrupole shape dynamics
Kenichi Matsuyanagi, Masayuki Matsuo, Takashi Nakatsukasa +3
We discuss the nature of the low-frequency quadrupole vibrations from small-amplitude to large-amplitude regimes. We consider full five-dimensional quadrupole dynamics including th…
Time-dependent density-functional description of nuclear dynamics
Takashi Nakatsukasa, Kenichi Matsuyanagi, Masayuki Matsuo +1
We present the basic concepts and recent developments in the time-dependent density functional theory (TDDFT) for describing nuclear dynamics at low energy. The symmetry breaking i…
Quantal rotation and its coupling to intrinsic motion in nuclei
Takashi Nakatsukasa, Kenichi Matsuyanagi, Masayuki Matsuzaki +1
Symmetry breaking is an importance concept in nuclear physics and other fields of physics. Self-consistent coupling between the mean-field potential and the single-particle motion…
Microscopic derivation of the quadrupole collective Hamiltonian for shape coexistence/mixing dynamics
Kenichi Matsuyanagi, Masayuki Matsuo, Takashi Nakatsukasa +3
Assuming that the time-evolution of the self-consistent mean field is determined by five pairs of collective coordinate and collective momentum, we microscopically derive the colle…
A Universal Damping Mechanism of Quantum Vibrations in Deep Sub-Barrier Fusion Reactions
Takatoshi Ichikawa, Kenichi Matsuyanagi
We demonstrate the damping of quantum octupole vibrations near the touching point when two colliding nuclei approach each other in the mass-asymmetric Pb + O system,…
High-spin torus isomers and their precession motions
T. Ichikawa, K. Matsuyanagi, J. A. Maruhn +1
We systematically investigate the existence of exotic torus isomers and their precession motions for a series of even-even nuclei from Si to Ni. We analyze the…
Shape transition and fluctuation in neutron-rich Cr isotopes around N = 40
Koichi Sato, Nobuo Hinohara, Kenichi Yoshida +3
The spherical-to-prolate shape transition in neutron-rich Cr isotopes from N = 34 to 42 is studied by solving the collective Schr\"odinger equation for the five-dimensional quadru…
BCS-pairing and nuclear vibrations
Kenichi Matsuyanagi, Nobuo Hinohara, Koichi Sato
On the basis of time-dependent mean-field picture, we discuss the nature of the low-frequency quadrupole vibrations from small-amplitude to large-amplitude regimes as representativ…
Microscopic approach to large-amplitude deformation dynamics with local QRPA inertial masses
Koichi Sato, Nobuo Hinohara, Takashi Nakatsukasa +2
We have developed a new method for determining microscopically the fivedimensional quadrupole collective Hamiltonian, on the basis of the adiabatic self-consistent collective coord…
Shape fluctuations in the ground and excited 0+ states of 30Mg and 32Mg
Nobuo Hinohara, Koichi Sato, Kenichi Yoshida +3
Large-amplitude collective dynamics of shape phase transition in the low-lying states of 30-36Mg is investigated by solving the five-dimensional (5D) quadrupole collective Schroedi…
Microscopic description of large-amplitude shape-mixing dynamics with inertial functions derived in local quasiparticle random-phase approximation
Nobuo Hinohara, Koichi Sato, Takashi Nakatsukasa +2
On the basis of the adiabatic self-consistent collective coordinate method, we develop an efficient microscopic method of deriving the five-dimensional quadrupole collective Hamilt…
A Model Analysis of Triaxial Deformation Dynamics in Oblate-Prolate Shape Coexistence Phenomena
Koichi Sato, Nobuo Hinohara, Takashi Nakatsukasa +2
From a viewpoint of oblate-prolate symmetry and its breaking, we adopt the quadrupole collective Hamiltonian to study dynamics of triaxial deformation in shape coexistence phenomen…
Microscopic description of oblate-prolate shape mixing in proton-rich Se isotopes
Nobuo Hinohara, Takashi Nakatsukasa, Masayuki Matsuo +1
The oblate-prolate shape coexisting/mixing phenomena in proton-rich 68,70,72Se are investigated by means of the adiabatic self-consistent collective coordinate (ASCC) method. The o…
Gamow-Hartree-Fock-Bogoliubov Method: Representation of quasiparticles with Berggren sets of wave functions
N. Michel, K. Matsuyanagi, M. Stoitsov
Single-particle resonant states, also called Gamow states, as well as bound and scattering states of complex energy form a complete set, the Berggren completeness relation. It is t…
Microscopic Derivation of Collective Hamiltonian by Means of the Adiabatic Self-Consistent Collective Coordinate Method
Nobuo Hinohara, Takashi Nakatsukasa, Masayuki Matsuo +1
Microscopic dynamics of the oblate-prolate shape coexistence/mixing phenomena in 68Se and 72Kr are studied by means of the adiabatic self-consistent collective coordinate (ASCC) me…
Microscopic Dynamics of Shape Coexistence Phenomena around 68Se and 72Kr
Nobuo Hinohara, Takashi Nakatsukasa, Masayuki Matsuo +1
The adiabatic self-consistent collective coordinate (ASCC) method is applied to the pairing-plus-quadrupole (P + Q) model Hamiltonian including the quadrupole pairing, and the obla…
A New Efficient Method of Hartree-Fock-Bogoliubov Calculation for Weakly Bound Nuclei
M. Stoitsov, N. Michel, K. Matsuyanagi
We propose a new method to solve the Hartree-Fock-Bogoliubov equations for weakly bound nuclei, which works for both spherical and axially deformed cases. In this approach, the qua…
Gauge-Invariant Formulation of Adiabatic Self-Consistent Collective Coordinate Method
Nobuo Hinohara, Takashi Nakatsukasa, Masayuki Matsuo +1
The adiabatic self-consistent collective coordinate (ASCC) method is a practical microscopic theory of large-amplitude collective motions in nuclei with superfluidity. We show that…
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…
Pairing and continuum effects on low-frequency quadrupole vibrations in deformed Mg isotopes close to the neutron drip line
K. Yoshida, M. Yamagami, K. Matsuyanagi
Low-frequency quadrupole vibrational modes in deformed Mg close to the neutron drip line are studied by means of the quasiparticle-random-phase approximation based on…
Mixed Representation RPA Calculation for Octupole Excitations on Superdeformed Sates in the 40Ca and Neutron-Rich Sulfur Regions
T. Inakura, H. Imagawa, Y. Hashimoto +3
By means of the mixed representation RPA based on the Skyrme-Hartree-Fock mean field, we investigate low-frequency octupole excitations built on the superdeformed (SD) states in th…
Effects of Time-Odd Components in Mean Field on Large Amplitude Collective Dynamics
Nobuo Hinohara, Takashi Nakatsukasa, Masayuki Matsuo +1
We apply the adiabatic self-consistent collective coordinate (ASCC) method to the multi-O(4) model and study collective mass (inertia function) of the many-body tunneling motion. C…