A5022717573- Nuclear physics research studies
- Atomic and Molecular Physics
- Quantum Chromodynamics and Particle Interactions
- Advanced Chemical Physics Studies
- Nuclear Physics and Applications
- Advanced NMR Techniques and Applications
- Astronomical and nuclear sciences
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Quantum, superfluid, helium dynamics
- Mass Spectrometry Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear reactor physics and engineering
- Molecular Spectroscopy and Structure
- Atomic and Subatomic Physics Research
- Ion-surface interactions and analysis
- Quantum chaos and dynamical systems
- Rare-earth and actinide compounds
- Inorganic Fluorides and Related Compounds
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Radioactive Decay and Measurement Techniques
- Crystallography and Radiation Phenomena
- Radioactive element chemistry and processing
- Cold Atom Physics and Bose-Einstein Condensates
Osaka University
2015-2025
Japan Atomic Energy Agency
2023-2024
Joint Institute for Nuclear Astrophysics
2021
Lawrence Berkeley National Laboratory
2017
Universidad de Sevilla
2017
Universitat de València
2008-2010
Niigata University
2009-2010
Laboratoire de Physique des deux infinis Bordeaux
2010
Institut National de Physique Nucléaire et de Physique des Particules
2010
Ghent University
2010
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 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 cross sections of the isovector spin-dipole resonances (SDR) in Sb isotopes excited by ${(}^{3}\mathrm{He},t)$ charge-exchange reaction at 450 MeV for $0\ifmmode^\circ\else\textdegree\fi{}\ensuremath{\le}{\ensuremath{\theta}}_{t}\ensuremath{\le}1.15\ifmmode^\circ\else\textdegree\fi{}$ have been measured. results are compared with predicted sum-rule strengths related to difference neutron and proton root-mean-square radii. Within model used, radii differences (neutron-skin thicknesses)...
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 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...
In an experiment with the BigRIPS separator at RIKEN Nishina Center, we observed two-proton (2p) emission from ^{67}Kr. At same time, no evidence for 2p of ^{59}Ge and ^{63}Se, two other potential candidates this exotic radioactivity, could be observed. This observation is in line Q value predictions which pointed to ^{67}Kr as being best new candidate among three radioactivity. only fourth ground-state emitter a half-life order few milliseconds. The decay energy was determined 1690(17) keV,...
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...
This study investigated the asymmetry among analogous spin-isospin-flip transition strengths from [𝐽𝜋,𝑇]=[1+,0]1 ground state of 14N to [2+,1]1 and [2+,1]2 states in 𝐴=14 nuclei 146C8, 147N7, 148O6. The reduced for excited 14N, denoted by 𝐵(GT0), were obtained via a 14N(𝑝,𝑝′) experiment at 𝐸𝑝=200 MeV performed iThemba LABS, South Africa. 𝐵(GT0) values compared with 𝐵(GT+) 𝐵(GT−) 14C 14O, which are available charge-exchange reaction measurements. Based on simple two-state model, off-diagonal...
It is shown via a study on $^{26}\mathrm{Mg}$ target that the ($t$,$^{3}\mathrm{He}$) reaction at 115 MeV/nucleon an accurate probe for extracting Gamow-Teller transition strengths. To do so, data are complemented by results from $^{26}\mathrm{Mg}$($^{3}\mathrm{He}$, $t$) 140 allows comparison of $T=2$ analog states excited mirror reactions. Extracted strengths $^{26}\mathrm{Mg}$($t$,$^{3}\mathrm{He}$) and compared with those $^{26}\mathrm{Mg}$($d$,$^{2}\mathrm{He}$)...
A computer program for the calculation of ion trajectory is described. This program"TRIO"(Third Order Ion Optics)is applicable to any optical system consisting drift spaces, cylindrical or toroidal electric sector fields, homogeneous inhomogeneous magnetic and electrostatic Q-lenses. The influence fringing field taken into consideration. special device introduced method matrix multiplication shorten time required proves be about 40 times shorter than ordinary as a result. possible execute...
The low-lying structure of $^{188,190,192}\mathrm{W}$ has been studied following $\ensuremath{\beta}$ decays the neutron-rich mother nuclei $^{188,190,192}\mathrm{Ta}$ produced projectile fragmentation a 1-GeV-per-nucleon $^{208}\mathrm{Pb}$ primary beam on natural beryllium target at GSI Fragment Separator. $\ensuremath{\beta}$-decay half-lives $^{188}\mathrm{Ta}$, $^{190}\mathrm{Ta}$, and $^{192}\mathrm{Ta}$ have measured, with $\ensuremath{\gamma}$-ray states in their respective W...
A ${}^{76}$Ge(${}^{3}$He,$t$)${}^{76}$As charge-exchange experiment at an incident energy of 420 MeV has been performed with resolution 30 keV. The Gamow-Teller GT${}^{\ensuremath{-}}$ strength distribution in ${}^{76}$As, which is the intermediate nucleus double-beta ($\ensuremath{\beta}\ensuremath{\beta}$) decay ${}^{76}$Ge, extracted. An unusually strong fragmentation observed even low excitation energies...
Gamow-Teller (GT) transitions in atomic nuclei are sensitive to both nuclear shell structure and effective residual interactions. The GT excitations were studied for the mass number $A=42$, 46, 50, 54 ``$f$-shell'' ($^{3}\mathrm{He}$, $t$) charge-exchange reactions. In $^{42}\mathrm{Ca}\ensuremath{\rightarrow}^{42}\mathrm{Sc}$ reaction, most of strength is concentrated lowest excited state at 0.6 MeV, suggesting existence a low-energy phonon excitation. As $A$ increases, high-energy...