A5024145334- Nuclear physics research studies
- Nuclear Physics and Applications
- Quantum Chromodynamics and Particle Interactions
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Particle accelerators and beam dynamics
- Advanced NMR Techniques and Applications
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Astronomical and nuclear sciences
- Nuclear reactor physics and engineering
- Particle Accelerators and Free-Electron Lasers
- X-ray Spectroscopy and Fluorescence Analysis
- Quantum, superfluid, helium dynamics
- Neutrino Physics Research
- High-Energy Particle Collisions Research
- Radiation Detection and Scintillator Technologies
- Magnetic confinement fusion research
- Radiation Therapy and Dosimetry
- Mass Spectrometry Techniques and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Inorganic Fluorides and Related Compounds
- Muon and positron interactions and applications
- High-pressure geophysics and materials
Osaka University
2015-2024
Tokyo Medical and Dental University
2024
Toho University
2024
Joint Institute for Nuclear Astrophysics
2021
RIKEN
1986-2018
Peking University
2016
State Key Laboratory of Nuclear Physics and Technology
2016
University of Notre Dame
2010-2012
Kyoto University
1979-2011
The University of Tokyo
1993-2011
A benchmark experiment on 208Pb shows that polarized proton inelastic scattering at very forward angles including 0{\deg} is a powerful tool for high-resolution studies of electric dipole (E1) and spin magnetic (M1) modes in nuclei over broad excitation energy range to test up-to-date nuclear models. The extracted E1 polarizability leads neutron skin thickness r_skin = 0.156+0.025-0.021 fm derived within mean-field model [Phys. Rev. C 81, 051303 (2010)], thereby constraining the symmetry its...
The double differential cross sections at ${\ensuremath{\theta}}_{\mathrm{lab}}$ between $0.0\ifmmode^\circ\else\textdegree\fi{}$ and $12.3\ifmmode^\circ\else\textdegree\fi{}$ the polarization transfer ${D}_{\mathrm{NN}}$ $0\ifmmode^\circ\else\textdegree\fi{}$ for ${}^{90}\mathrm{Zr}(p,n)$ reaction are measured a bombarding energy of 295 MeV. A multipole decomposition technique is applied to extract $L=0$, $L=1$, $L=2$, $L=3$ contributions. Gamow-Teller (GT) strength $B(\mathrm{GT})$ in...
The electric dipole strength distribution in 120Sn between 5 and 22 MeV has been determined at RCNP Osaka from a polarization transfer analysis of proton inelastic scattering E_0 = 295 forward angles including 0{\deg}. Combined with photoabsorption data an polarizability \alpha_D(120Sn) 8.93(36) fm^3 is extracted. as isovector observable par excellence carries direct information on the nuclear symmetry energy its density dependence. correlation new value well established \alpha_D(208Pb)...
The angular distributions of the cross section, proton analyzing power, and all polarization transfer coefficients $\stackrel{\ensuremath{\rightarrow}}{p}d$ elastic scattering were measured at 250 MeV. range center-of-mass angles was $10\ifmmode^\circ\else\textdegree\fi{}--165\ifmmode^\circ\else\textdegree\fi{}$ for section about $10\ifmmode^\circ\else\textdegree\fi{}--95\ifmmode^\circ\else\textdegree\fi{}$ coefficients. These are first measurements a complete set observables intermediate...
Elastic scattering of 65 MeV polarized protons from 25 nuclei ($^{16}\mathrm{O}$---$^{209}\mathrm{Bi}$) has been measured. The volume integral the real central part optical potential (${J}_{R}$) shows a behavior similar to binding energy curve for target mass number. mean square radius is found obey relation ${〈{r}^{2}〉}_{\mathrm{pot}}=(0.937\ifmmode\pm\else\textpm\fi{}0.012){A}^{\frac{2}{3}}+(6.42\ifmmode\pm\else\textpm\fi{}0.21)$ ${\mathrm{fm}}^{2}$. By comparing with systematics charge...
The cluster structures of the excited states in $^{11}$B are studied by analyzing isoscalar monopole and quadrupole strengths $^{11}$B($d$,$d'$) reaction at $E_d=200$ MeV. excitation compared with predictions shell-model antisymmetrized molecular-dynamics (AMD) calculations. It is found that large strength for $3/2^-_3$ state $E_x=8.56$ MeV well described AMD calculation an evidence a developed $2\alpha+t$ structure.
The possibility of observing neutrinoless double $\ensuremath{\beta}$ decay offers the opportunity determining effective neutrino mass if nuclear matrix element were known. Theoretical calculations are uncertain, and occupation valence orbits by nucleons active in is likely to be important. proton ground states $^{76}\mathrm{Ge}$, a candidate for such decay, $^{76}\mathrm{Se}$, corresponding daughter nucleus, determined precisely measuring cross sections proton-removing transfer reactions....
The double-differential cross sections for the Ca48(p,n) and Ti48(n,p) reactions were measured at 300 MeV. A multipole decomposition technique was applied to spectra extract Gamow-Teller (GT) components. integrated GT strengths up an excitation energy of 30 MeV in Sc48 are 15.3±2.2 2.8±0.3 (p,n) (n,p) spectra, respectively. In additional found above 8 where shell models within fp shell-model space predict almost no strengths, suggesting that present description nuclear matrix element...
The Gamow-Teller (GT) strength distribution has been investigated in a high-resolution (${}^{3}$He,$t$) charge-exchange experiment on the double-beta ($\ensuremath{\beta}\ensuremath{\beta}$) decaying nucleus ${}^{100}$Mo. was carried out at Osaka University Research Center for Nuclear Physics (RCNP) with 420 MeV incident ${}^{3}$He beam and Grand Raiden magnetic spectrometer. A final-state energy resolution of 33 keV achieved. It found that nearly entire low-energy (up to...
Scattering of protons several hundred MeV is a promising new spectroscopic tool for the study electric dipole strength in nuclei. A case 208Pb shows that at very forward angles J^pi = 1- states are strongly populated via Coulomb excitation. separation from nuclear excitation other modes achieved by multipole decomposition analysis experimental cross sections based on theoretical angular distributions calculated within quasiparticle-phonon model. The B(E1) transition distribution extracted...
The Gamow-Teller (GT) strength distribution has been investigated in a high-resolution (${}^{3}$He,$t$) charge-exchange experiment on the double-beta ($\ensuremath{\beta}\ensuremath{\beta}$) decaying nucleus ${}^{96}$Zr. was carried out at Osaka University Research Center for Nuclear Physics (RCNP) with 420 MeV incident ${}^{3}$He beam and Grand Raiden magnetic spectrometer. A final-state energy resolution of 32 keV achieved. large fraction low-energy GT${}^{\ensuremath{-}}$ is identified...
The electric dipole strength in 120Sn has been extracted from proton inelastic scattering experiments at E_p = 295 MeV and forward angles including 0 degree. Below neutron threshoild it differs the results of a 120Sn(gamma,gamma') experiment peaks an excitation energy 8.3 MeV. total corresponds to 2.3(2)% energy-weighted sum rule is more than three times larger what observed with (gamma,gamma') reaction. This implies strong fragmentation E1 and/or small ground state branching ratios excited...
Double differential cross sections between 0°–12° were measured for the 90Zr(n, p) reaction at 293 MeV over a wide excitation energy range of 0–70 MeV. A multipole decomposition technique was applied to present data as well previously obtained 90Zr(p, n) extract Gamow–Teller (GT) component from continuum. The GT quenching factor Q derived by using total strengths. result is Q=0.88±0.06, not including an overall normalization uncertainty in unit section 16%.
Three precise measurements for elastic $pd$ scattering at $135\text{ }\text{ }\mathrm{MeV}/A$ have been performed with the three different experimental setups. The cross sections are described well by theoretical predictions based on modern nucleon-nucleon forces combined three-nucleon forces. Relativistic Faddeev calculations show that relativistic effects restricted to backward angles. This result supports two recently reported RIKEN and contradicts KVI data.
A high-speed 32*32-b parallel multiplier with an improved structure using 0.8- μm CMOS triple-level-metal technology is discussed. unit adder, a 4-2 compressor, enhances the parallelism of array. 25% reduction in propagation delay time achieved by compressor. The contains 27704 transistors 2.68-*2.71-mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> die area. multiplication 15 ns at 5 V power dissipation 277 mW 10-MHz operation....
The differential cross sections and vector analyzing powers for nd elastic scattering at En=248 MeV were measured 10°–180° in the center-of-mass (c.m.) system. To cover wide angular range, experiments performed separately by using two different setups forward backward angles. data are compared with theoretical results based on Faddeev calculations realistic nucleon-nucleon (NN) forces such as AV18, CD Bonn, Nijmegen I II, their combinations three-nucleon (3NFs), Tucson-Melbourne 99 (TM99),...