A5033503924- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Nuclear physics research studies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Atomic and Molecular Physics
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Advanced NMR Techniques and Applications
- Particle Detector Development and Performance
- Advanced Chemical Physics Studies
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Medical Imaging Techniques and Applications
- Astronomical and nuclear sciences
- Cold Atom Physics and Bose-Einstein Condensates
- Astrophysics and Cosmic Phenomena
- Quantum optics and atomic interactions
- Advanced Frequency and Time Standards
- Rare-earth and actinide compounds
Tokyo Institute of Technology
2015-2025
University of Cambridge
2021-2024
University of Cincinnati
2013-2023
Osaka Metropolitan University
2023
University of the Basque Country
2013-2022
University of Bonn
2013-2022
Duke University
2022
Campbell Collaboration
2012-2022
Chonnam National University
2018-2022
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2019
Prokaryotic chitinases, class III plant yeast and endo-beta-N-acetylglucosaminidases share weak amino acid sequence similarities at the certain region of each enzyme. These regions have been assumed to be important for catalytic activities enzymes. To verify this assumption, three residues (Ser-160, Asp-200, Glu-204) in chitinase A1 Bacillus circulans WL-12 were chosen, based on alignment sharing similarity, replaced by site-directed mutagenesis. Kinetic parameters...
Cross sections and analyzing powers for polarized proton elastic scattering from $^{58}\mathrm{Ni}$, $^{204,206,208}\mathrm{Pb}$ were measured at intermediate energy ${E}_{p}=295$ MeV. An effective relativistic Love-Franey interaction is tuned to reproduce $^{58}\mathrm{Ni}$ data within the framework of impulse approximation. The neutron densities lead isotopes are deduced using model-independent sum-of-Gaussians distributions. Their error envelopes estimated by a new...
We have investigated the isoscalar giant resonances in Sn isotopes using inelastic scattering of 386-MeV alpha-particles at extremely forward angles, including 0deg. obtained completely "background-free inelastic-scattering spectra for over angular range 0deg--9deg and up to an excitation energy 31.5 MeV. The strength distributions various multipoles were extracted by a multipole decomposition analysis based on expected respective multipoles. find that centroid energies monopole resonance...
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.
Differential cross sections for γp→K+Λ(1405) and γp→K+Σ0(1385) reactions have been measured in the photon energy range from 1.5 to 2.4 GeV angular of 0.8<cos(Θ)<1.0 K+ scattering angle center-of-mass system. This data is first measurement Λ(1405) photoproduction section. The line shapes Σ+π− Σ−π+ decay modes were different with each other, indicating a strong interference isospin 0 1 terms Σπ amplitudes. ratios production Σ0(1385) two ranges: near threshold (1.5<Eγ<2.0 GeV) far it...
The interference fragmentation function translates the of a quark with transverse projection spin into an azimuthal asymmetry two final-state hadrons. In e+e- annihilation product functions is measured. We report nonzero asymmetries for pairs charge-ordered pi+pi- pairs, which indicate significant in this channel. results are obtained from 672 fb-1 data sample that contains 711 \times 106 and was collected at near ?(4S) resonance, Belle detector KEKB asymmetric-energy collider.
The 12C excitation energy spectra populated in both proton and α-particle inelastic scattering measurements are examined. data indicate the existence of a 2+ state at Ex=9.75(0.15) MeV with width 750(150) keV. It is believed that this corresponds to 7.65 MeV, 0+, Hoyle state, which acts as main path by carbon synthesized stars. A simultaneous R-matrix analysis two sets indicates possesses very large α-reduced width, approaching Wigner limit. This would associated highly clustered structure....
A search for $K^-pp$ bound state (the lightest kaonic nucleus) has been performed using the $\gamma d \rightarrow K^+ \pi^- \rm{X}$ reaction at E$_\gamma$=1.5-2.4 GeV LEPS/SPring-8. The differential cross section of $K^+ \pi^-$ photo-production off deuterium measured first time in this energy region, and a bump structure was searched inclusive missing mass spectrum. statistically significant not observed region from 2.22 to 2.36 GeV/$c^2$, upper limits production were determined be 0.1$-$0.7...
A series of 2,5-diaryl-3,4-diphenylsiloles, with various mono-substituted phenyl groups, extended pi-conjugated and heteroaryl groups as aryl at the 2,5-positions, has been prepared by a one-pot synthesis from bis(phenylethynyl)silanes based on intramolecular reductive cyclization followed palladium-catalyzed cross-coupling halides. Crystal structures chemical reactivities toward alkaline desilylation reactions have studied 2,5-bis(p-mono-substituted phenyl)silole derivatives to elucidate...
The systematic behavior of the isoscalar giant dipole resonance (ISGDR) in $^{90}\mathrm{Zr}$, $^{116}\mathrm{Sn}$, $^{144}\mathrm{Sm}$, and $^{208}\mathrm{Pb}$ is studied with inelastic $\ensuremath{\alpha}$ scattering at ${E}_{\ensuremath{\alpha}}=386\phantom{\rule{0.3em}{0ex}}\mathrm{MeV}$. Multipole-decomposition analysis applied to extract excitation strengths resonances from $(\ensuremath{\alpha},{\ensuremath{\alpha}}^{\ensuremath{'}})$ differential cross sections...
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 $^{26}\mathrm{Mg}$($d$,$^{2}\mathrm{He}$)...
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...
Differential cross sections for transitions of known weak strength were measured with the (3He, t) reaction at 420 MeV on targets 12C, 13C, 18O, 26Mg, 58Ni, 60Ni, 90Zr, 118Sn, 120Sn, and 208Pb. Using these data, it is shown that proportionalities between strengths this probe follow simple trends as a function mass number. These can be used to confidently determine Gamow-Teller distributions in nuclei which proportionality cannot calibrated via β-decay strengths. Although theoretical...
The s-wave neutron fraction of the 0+ levels in 12Be has been investigated for first time through 11Be(d,p) transfer reaction using a 5A MeV 11Be beam at TRIUMF, Canada. populated all known bound states 12Be. ground state spectroscopic factor was determined to be 0.28−0.07+0.03 while that long-lived 02+ excited 0.73−0.40+0.27. This observation, together with smaller effective separation energy indicates enhanced probability an extended density tail beyond 10Be core compared state.
New measurements of the interaction cross sections 22,23O at 900A MeV performed GSI, Darmstadt are reported that address unsolved puzzle large section previously observed for 23O. The matter radii these oxygen isotopes extracted through a Glauber model analysis in good agreement with new predictions ab initio coupled-cluster theory here. They consistent 22O+neutron description 23O as well.
Background-free inelastic scattering spectra have been obtained for five Sm isotopes with $386\text{\ensuremath{-}}\text{MeV}$ $\ensuremath{\alpha}$ particles at forward angles (including $0\ifmmode^\circ\else\textdegree\fi{}$) to investigate the effect of deformation on compressional-mode giant resonances. The strength distributions $L\ensuremath{\leqslant}3$ isoscalar resonances extracted via a multipole decomposition analysis using angular calculated in framework density-dependent...
The incompressibility of infinite nuclear matter (𝐾∞) is a parameter in the description equation state that governs energy cost associated with density oscillations near saturation density. most direct experimental method for studying this property to probe isoscalar giant monopole resonance (ISGMR) finite nuclei. This paper explores use 6Li as study ISGMR several stable nuclei: 58Ni, 90Zr, 116Sn, and 208Pb, complementary using inelastic scattering 𝛼 particles, which has been used great...
Under the assumption that isospin T is a good quantum number, isobaric analog states and various analogous transitions among these are expected in isobars with mass number A. Strengths of Gamow-Teller (GT) $M1$ have been compared for an $A=26$ isobar triplet ${T}_{z}=+1, 0,$ $\ensuremath{-}1,$ where ${T}_{z}$ defined by ${T}_{z}=(N\ensuremath{-}Z)/2.$ The ${T}_{z}=+\stackrel{\ensuremath{\rightarrow}}{1}0$ GT from ${J}^{\ensuremath{\pi}}{=0}^{+}$ ground state ${}^{26}\mathrm{Mg}$ to excited...
The excitation and subsequent proton decay of the isovector spin-flip giant monopole resonance (IVSGMR) is studied via 208Pb(3He,t) reaction at 410 MeV. In inclusive spectrum (60+/-5)% non-energy-weighted sum-rule strength for this 2 variant Planck's over 2h omega was found in region 29<Ex(208Bi)<51 central energy width IVSGMR are 37+/-1 MeV 14+/-3 MeV, respectively. It that branching ratio (52+/-12)% deep neutron-hole states 207Pb strongly fed.
The $^{11}$B($^3$He$, t$), $^{11}$B($d, d'$), and $^{11}$B($p, p'$) reactions were measured at forward scattering angles including $0^\circ$ to study the isovector isoscalar spin-flip M1 strengths in $^{11}$B. t$) cross sections compared with results of distorted-wave impulse-approximation (DWIA) calculation, Gamow-Teller (GT) for low-lying states $^{11}$C determined. GT converted using isobaric analog relations under assumption isospin symmetry. obtained from ($d, d'$) analysis by assuming...
A new experimental approach to the famous problem of anomalously slow Gamow-Teller (GT) transitions in β decay A=14 multiplet is presented. The GT strength distributions excited states 14C and 14O were studied high-resolution (d,2He) (3He,t) charge-exchange reactions on 14N. No-core shell-model calculations capable reproducing suppression decays predict a selective excitation Jπ=2+ states. confirmation represents validation assumptions about underlying structure 14N ground state wave...