A5042263050- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Advanced Chemical Physics Studies
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Mass Spectrometry Techniques and Applications
- Nuclear reactor physics and engineering
- Astronomical and nuclear sciences
- Cold Atom Physics and Bose-Einstein Condensates
- Mitochondrial Function and Pathology
- Scientific Research and Discoveries
- Rare-earth and actinide compounds
- Particle accelerators and beam dynamics
- Boron Compounds in Chemistry
- Quantum, superfluid, helium dynamics
- Theoretical and Computational Physics
- Particle physics theoretical and experimental studies
RIKEN Nishina Center
2022-2025
Kyushu University
2025
Osaka University
2017-2023
Exclusive cross sections and momentum distributions have been measured for quasifree one-neutron knockout reactions from a $^{54}\mathrm{Ca}$ beam striking on liquid hydrogen target at $\ensuremath{\sim}200\text{ }\text{ }\mathrm{MeV}/u$. A significantly larger section to the ${p}_{3/2}$ state compared ${f}_{5/2}$ observed in excitation of $^{53}\mathrm{Ca}$ provides direct evidence nature $N=34$ shell closure. This finding corroborates arising new closure neutron-rich calcium isotopes. The...
We report on the first γ-ray spectroscopy of 51,53K produced via 52,54Ca(p,2p) reactions at ∼250 MeV/nucleon. Unambiguous final-state angular-momentum assignments were achieved for beam intensities down to few particles per second by using a new technique based reaction vertex tracking combined with thick liquid-hydrogen target. Through and exclusive parallel momentum distribution analysis, 3/2+ ground states 1/2+ excited in established quantifying natural ordering 1d3/2 2s1/2 proton-hole...
Gamma decays were observed in $^{56}$Ca and $^{58}$Ca following quasi-free one-proton knockout reactions from $^{57,59}$Sc beams at $\approx 200$ MeV/nucleon. For $^{56}$Ca, a $\gamma$ ray transition was measured to be 1456(12) keV, while for an indication 1115(34) keV. Both transitions tentatively assigned as the $2^+_1 \rightarrow 0^+_{gs}$ decays, compared results ab initio conventional shell-model approaches. A calculation wide model space with marginally modified effective...
Background: The proton-induced deuteron knockout reaction, ($p,pd$), is one of the interests in studies probing deuteron-like $p\text{\ensuremath{-}}n$ correlation nuclei. According to a recent study inclusive deuteron-induced $(d,{d}^{\ensuremath{'}}x)$, refraction effect has significant on elementary process, nucleon-deuteron ($N\text{\ensuremath{-}}d$) binary scattering inside nucleus, reaction. In paper, it shown that proper treatment local $N\text{\ensuremath{-}}d$ relative momentum...
Background: Deuteron-induced one-neutron transfer reactions have been used to extract single-particle properties of nuclei, and the adiabatic (AD) approximation is often simply treat deuteron breakup states.Purpose: The primary goal examine validity AD for $(d,p)$ reaction systematically. We clarify also role closed channels ignored in description reactions.Methods: calculate cross sections with continuum-discretized coupled-channels method (CDCC) 128 systems compare results those obtained...
An isoscalar $pn$ pair is expected to emerge in nuclei that have similar proton and neutron numbers it may be a candidate for deuteron ``cluster.'' There is, however, no experimental evidence it. The purpose of this paper construct new reaction model the ($p,pd$) including breakup elementary process reformation by final-state interactions (FSIs). How these processes contribute observables investigated. distorted wave impulse approximation extended twofold. ($p,pd$), i.e., $p$-$d$ elastic...
The calcium isotopes are an ideal system to investigate the evolution of shell structure and magic numbers. Although properties surface nucleons in have been well studied, probing deeply bound remains a challenge. Here, we report on first measurement unbound states $^{53}$Ca $^{55}$Ca, populated from \ts{54,56}Ca($p,pn$) reactions at beam energy around 216 MeV/nucleon RIKEN Radioactive Isotopes Beam Factory. resonance properties, partial cross sections, momentum distributions these were...
The effective polarization of the residual nucleus in proton-induced $\ensuremath{\alpha}$ knockout reaction is investigated within distorted wave impulse approximation framework. strong absorption emitted particle results selectivity on position depending third component single-particle orbital angular momentum inside a nucleus, hence spin direction residue. This caused by mechanism that similar to Maris effect, proton reactions. However, as distinct feature process, degrees freedom...
Background: The isoscalar $pn$ pair is expected to emerge in nuclei having the similar proton and neutron numbers but there no clear experimental evidence for it.Purpose: We aim clarify correspondence between pairing strength many-body calculation triple differential cross section (TDX) of proton-induced deuteron knockout ($p,pd$) reaction on $^{16}\mathrm{O}$.Methods: radial wave function with respect center $^{16}\mathrm{O}$ calculated energy density functional (EDF) approach implemented...
The role of the short-range part (repulsive core) proton-neutron ($pn$) potential in deuteron elastic breakup processes is investigated. A simplified one-range Gaussian and Argonne V4' (AV4') central are adopted continuum-discretized coupled-channels (CDCC) method. cross sections calculated with these two potentials compared. repulsive core found not to affect at energies from 40 MeV 1 GeV. To understand this result, an analysis peripherality concerning $p$-$n$ relative coordinate performed....
The proton-induced deuteron knockout reaction, ($p$,$pd$), is one of the interests in studies for probing deuteron-like $p$-$n$ correlation nuclei. According to a recent study inclusive deuteron-induced $(d,d'x)$, refraction effect has significant on elementary process, nucleon-deuteron ($N$-$d$) binary scattering inside nucleus, reaction. In paper, it shown that proper treatment local $N$-$d$ relative momentum process crucial $(d,d'x)$ reactions at $100$ MeV and below. present work, we...
$^6$Li is usually treated as an $\alpha+p+n$ three-body system, and the validity of this picture important for understanding reactions. The ($p$,$2p$) reaction a powerful method to study structure valence nucleons in $^6$Li. Recently, new experimental data $^{6}$Li($p$,$2p$)$^{5}$He have been obtained should be analyzed. We investigate using wave function model. used obtain relative between $p$ $^5$He. combine with distorted impulse approximation. Our results reproduce triple differential...
The effective polarization of the residual nucleus in proton-induced $α$ knockout reaction is investigated within distorted wave impulse approximation framework. strong absorption emitted particle results selectivity on "position" depending third component single-particle orbital angular momentum inside a nucleus, hence spin direction residue. This caused by mechanism that similar to Maris effect, proton reactions. However, as distinct feature process, degrees freedom reacting particles play...
An isoscalar $pn$ pair is expected to emerge in nuclei that have similar proton and neutron numbers it may be a candidate for deuteron ``cluster.'' There is, however, no experimental evidence it. The purpose of this paper construct new reaction model the ($p,pd$) including breakup elementary process reformation by final-state interactions (FSIs). How these processes contribute observables investigated. distorted wave impulse approximation extended twofold. ($p,pd$), i.e., $p$-$d$ elastic...