A5069208403- Nuclear physics research studies
- Nuclear Physics and Applications
- Advanced Chemical Physics Studies
- Atomic and Molecular Physics
- Quantum Chromodynamics and Particle Interactions
- Astronomical and nuclear sciences
- Quantum, superfluid, helium dynamics
- Rare-earth and actinide compounds
- Advanced NMR Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Particle accelerators and beam dynamics
- Inorganic Fluorides and Related Compounds
- Nuclear reactor physics and engineering
- Atomic and Subatomic Physics Research
- Radioactive Decay and Measurement Techniques
- Radiopharmaceutical Chemistry and Applications
- Neutrino Physics Research
- Metal and Thin Film Mechanics
- Magnetic properties of thin films
- Electron and X-Ray Spectroscopy Techniques
- Metallic Glasses and Amorphous Alloys
- Nuclear Materials and Properties
- Radiation Therapy and Dosimetry
- Particle Accelerators and Free-Electron Lasers
- Quantum chaos and dynamical systems
University of Tsukuba
1977-2024
Osaka University
1999-2013
RIKEN
1976-2010
High Energy Accelerator Research Organization
1978-2010
RIKEN Nishina Center
2007
Nippon Soken (Japan)
2004
Tohoku University
1990-1996
Tokushima University
1995
Kyoto University
1995
Kobe Tokiwa University
1995
New pre-scission neutron multiplicity (${\ensuremath{\nu}}_{\mathrm{pre}}$) data for $^{7}\mathrm{\ensuremath{-}}$, $^{16}\mathrm{\ensuremath{-}}$, and $^{20}\mathrm{induced}$ fission are presented, spanning a fissility range from 0.60 to 0.85. Fission time scales have been deduced two extreme assumptions regarding the mean excitation energy during fission. It is found fusion-fission reactions that scale independent of fissility, within factor 1.5. A comparison...
Spin-isospin excitations in $^{208}\mathrm{Bi}$ have been investigated using the $^{208}\mathrm{Pb}$ ${(}^{3}$He,t${)}^{208}$Bi reaction at near \ensuremath{\theta}\ensuremath{\approxeq}0\ifmmode^\circ\else\textdegree\fi{} E${(}^{3}$He)=450 MeV. The microscopic structure of Gamow-Teller resonance (GTR), isobaric analog state (IAS), and spin-flip dipole (\ensuremath{\Delta}L=1) (SDR) has studied by observing their direct proton decays to low-lying neutron-hole states $^{207}\mathrm{Pb}$....
The production and decay of 272 111 has been investigated using a gas-filled recoil ion separator in irradiations 209 Bi targets with 64 Ni beam at 320, 323 326 MeV. We have observed 14 α-decay chains total, that can be assigned, on the basis their time correlations, to subsequent decays from produced Bi( Ni,1n) reaction. present result is first clear confirmation for discovery its products, 264 Bh 268 Mt, reported previously by GSI group. New information half-lives energies as well...
\ensuremath{\alpha}-cluster states in $^{44}\mathrm{Ti}$ have been investigated the $^{40}\mathrm{Ca}$${(}^{6}$Li,d${)}^{44}$Ti reaction at E=50 MeV. The angular distributions of 34 levels excitation energies for ${\mathit{E}}_{\mathit{x}}$=0--13 MeV allow us to analyze data. positive-parity members ground-state band (the ${\mathit{K}}^{\mathrm{\ensuremath{\pi}}}$=${0}^{+}$ band) were well reproduced by finite-range distorted-wave Born approximation calculations up transferred momentum L=8....
The behavior of a pairing excitation, previously reported in even actinide nuclei, has been explored with two odd-neutron ($^{235}\mathrm{U}$ and $^{239}\mathrm{Pu}$) odd-proton ($^{237}\mathrm{Np}$ $^{243}\mathrm{Am}$) targets as well the even-even $^{226}\mathrm{Ra}$ $^{240}\mathrm{Pu}$. It is found that this similar to nuclei.[NUCLEAR REACTIONS $^{226}\mathrm{Ra}$, $^{235}\mathrm{U}$, $^{237}\mathrm{Np}$, $^{239}\mathrm{Pu}$, $^{243}\mathrm{Am}$, $^{240}\mathrm{Pu}(p,t)$ measured...
High-resolution excitation functions were measured in the energy range ${E}_{\mathrm{c}.\mathrm{m}.}=19\ensuremath{-}25$ MeV for $^{12}\mathrm{C}(^{16}\mathrm{O},\ensuremath{\alpha})$ reaction to highly excited states $^{24}\mathrm{Mg}$ (${E}_{\mathrm{exc}}\ensuremath{\approx}13.5\ensuremath{-}17.5$ MeV). The strong, rapid observed fluctuations suggest a predominately compound-nucleus mechanism. selective population of high-spin by present contrast lack such selectivity...
Isospin is a good quantum number under the assumption that nuclear interaction charge independent. An analogous structure of excited states expected for nuclei with same mass $A$ but different $z$ components ${T}_{z}$ isospin $T$, where ${T}_{z}=(N\ensuremath{-}Z)/2$. The has been studied isobaric $^{58}\mathrm{Ni}$ and $^{58}\mathrm{Cu}$ by comparing transitions from ground state (initial ${T}_{i}=1$ ${J}^{\ensuremath{\pi}}={0}^{+}$) to $M1$ Gamow-Teller (GT)...
Gamow-Teller (GT) transitions and $M1$ from or to the ground states are analogous in pair of $T=1/2$ mirror nuclei, if excited hold mirror-symmetry properties. In order study structure $A=27$ nuclei ${}^{27}\mathrm{Al}$ ${}^{27}\mathrm{Si},$ experimental data on GT transition strengths obtained ${}^{27}{\stackrel{\ensuremath{\rightarrow}}{\mathrm{Si}}}^{27}\mathrm{Al}$ $\ensuremath{\beta}$ decay a good-resolution ${}^{27}\mathrm{Al}{(}^{3}\mathrm{He}{,t)}^{27}\mathrm{Si}$ reaction at 150...
Alpha-cluster states in 40Ca, 44Ti and 94Mo have been investigated by the 36Ar(6Li,d)40Ca at E = 50 MeV, 40Ca(6Li,d)44Ti reaction 37 MeV 90Zr(6Li,d)94Mo MeV. Parity-doublet bands 40Ca successfully established, while trial to obtain angular distributions of was unsuccessful. This report reviews our experimental search for α-clustering A ≥ 40 nuclei. For nucleus, positive-parity members ground-state band (the Kπ 0+ band) were well reproduced finite-range distorted-wave Born approximation...
Abstract A chemical vapor deposition process for the ferroelectric SrBi2Ta2O9 has been developed utilizing a liquid delivery and flash vaporization technique. Uniform layered perovskite of was formed over 4 inch wafers by followed annealing at 800°C in oxygen ambient. The thin film capacitors showed well saturated hysteresis loops with remanent polarization (2Pr) coercive field (Ec) up to 21.3 (μC/cm2) 47.2 (kV/cm), respectively. platinum electrodes fatigue free characteristics after...
Inelastic scattering of 65-MeV protons on $^{50}\mathrm{Ti}$, $^{52}\mathrm{Cr}$, and $^{54}\mathrm{Fe}$ has been measured for states up to 11-MeV excitation energy. Clusters ${3}^{\mathrm{\ensuremath{-}}}$ in all three nuclei are found form low-energy-octupole resonances at a mean energy ${E}_{x}$\ensuremath{\sim}7.5 MeV. The systematic decrease strength the first state with mass number observed. This is interpreted terms ``blocking'' effect proton transitions from sd shell orbits...
Excitation functions for the ${0}^{+}$, 6.049-MeV and ${3}^{\ensuremath{-}}$, 6.130-MeV states were measured separately at ${\ensuremath{\theta}}_{\mathrm{c}.\mathrm{m}.}\ensuremath{\sim}15.0\ifmmode^\circ\else\textdegree\fi{}$, in steps of 86 keV from ${E}_{\mathrm{c}.\mathrm{m}.}=22.7\ensuremath{-}33.0$ MeV. Enhancement cross section by a factor 2-5 above constant is clearly observed 23.60, 24.60, 28.40, 32.20 MeV, lowest three which most probable total spins, ${J}^{\ensuremath{\pi}}$, are...
The extent of particle-photon mixing in $^{248}\mathrm{Cf}$ and $^{249}\mathrm{Cf}$ has been determined using the $^{249}\mathrm{Cf}(d, t)$ {d}^{\ensuremath{'}})$ reactions. ${K}^{\ensuremath{\pi}}={2}^{\ensuremath{-}}$ bands were identified at 593 1477 keV $^{248}\mathrm{Cf}$. Since only neutron two quasiparticle configuration expected below 2 MeV is ${{{\frac{9}{2}}^{\ensuremath{-}}[734];{\frac{5}{2}}^{+}[622]}}_{2\ensuremath{-}}$, second band considered to be predominantly phonon...
The Gamow-Teller transition strengths, $B$(GT), in $pf$-shell nuclei are of interest nuclear physics as well astrophysics. A high-resolution (${}^{3}\mathrm{He},t$) charge-exchange (CE) reaction was performed on the ${T}_{z}=+1$ nucleus ${}^{54}$Fe at 0${}^{\ensuremath{\circ}}$ and an intermediate incident energy 140 MeV/nucleon for study precise GT strengths to final ${T}_{z}=0$ ${}^{54}$Co. By applying dispersion matching techniques a high-quality ${}^{3}$He beam RCNP, resolution 21 keV...