We present a novel unified approach to describe the dense symmetric nuclear matter by combining the quarkyonic matter framework with the parity doublet model. This integration allows for a consistent treatment of the transition from hadronic to quark degrees of freedom while incorporating chiral symmetry restoration effects. Our model introduces a chiral invariant mass for both baryons and...
Antisymmetrized Molecular Dynamics (AMD) has emerged as a powerful microscopic framework for investigating exotic structures in unstable nuclei, especially those near the drip lines. Unlike traditional mean-field models, AMD treats each nucleon as a Gaussian wave packet, allowing the emergence of deformation, clustering, and halo phenomena from first principles without assuming predefined...
Silicon Photomultipliers (SiPMs), which operate in Geiger mode, are widely used in high energy physics experiments due to their excellent photon detection capabilities. However, their performance can degrade when exposed to high radiation environments which may significantly impact experimental results.
In this study, we investigate the radiation induced performance degradation of two...
The laser spectroscopy group at the University of Manchester aims to realise a combination of Inductively Coupled Plasma Mass Spectrometry (ICP-MS) with a Multi-Reflection Time-of-Flight Mass-Spectrometer (MR-ToF).
The MR-ToF has in recent decades become a powerful technique for high-precision mass measurement of exotic nuclides at RIB facilities, using multiple reflections of an ion cluster...
The rapid neutron capture (r-) process holds a significant amount of interest as a means for nucleosynthesis of elements in astrophysical environments. From the perspectives of both nuclear physics and astrophysics, ongoing efforts are being carried out to better understand it. Such efforts include the measurements of β-decay and delayed neutron emissions of the r-process elements in...
This study advances the nuclear shell model by systematically investigating effective interactions in the f5pgd5 shell region (mass numbers 40 < A < 100).
Building on existing interactions(JUN45 and jj45pna), we refine central, spin-orbit, and tensor force parameters, incorporating universal monopole corrections to develop the first dedicated effective interaction for the f5pgd5 region....
The report presents an overview on the combination of improved thermoluminescence (TL) dating and nuclear techniques - such as neutron activation analysis (NAA) and isotope ratio analysis - for the study of ancient sites. Applications of these techniques for ancient architectures built by bricks, stones and their challenging issues. Our recent improved thermoluminescence (imTL) technique is...
The 12C(α, γ)16O reaction plays a pivotal role in nuclear astrophysics research. The direct measurement of this reaction remains particularly challenging due to its extremely low cross section (approximately 10-17 barn at 300 keV) within the Gamow window. This study addresses the critical need for irradiation-resistant 12C-enriched targets to enable...
As a proton-emitter located beyond the proton drip line, $^{185}\mathbf{Bi}$ possesses unique properties, such as susceptibility to deformation, continuum effects, etc. A recent experiment confirmed the $1/2^+$ ground state, but left long-lived isomeric state hard to explain. The study of proton emission can promote a large number of exotic phenomena and new physics. The difficulties in...
The Nuclear Equation of State (EoS) provides a fundamental link between nuclear physics and astrophysics, yet its predictive power is limited by our incomplete understanding of the nuclear symmetry energy, $E_\text{sym}(\rho)$. This critical component, which quantifies the energy cost of proton–neutron asymmetry, is well constrained at the saturation density found in stable nuclei, but remains...
With the development of the X-ray source, stimulating nuclear quantum states directly becomes possible experimentally with synchrotrons and XFELs. The collective behaviors of the stimulated nuclear ensemble were studied theoretically in the past decade as a new frontier of nuclear science and quantum science. With specific numerical method and theoretical model, the correlation between...
The long-range near-side ridge phenomenon in two-particle correlation(∆φ-Δη) is one of powerful tools in exploring strong interaction. Although the hydrodynamic model describes this ridge structure in heavy ion collisions, this could not offer the explanation that ridge phenomenon occurs in the small systems such as pp collisions and p-Pb collisions because density and temperature are not...
Accurate velocity determination of stored ions in storage rings plays a key role for nuclear mass measurements using the technique of B$\rho$-defined isochronous mass spectrometry (B$\rho$-IMS). However, the accuracy and precision of the ion's velocity are seriously deteriorated by the non-isochonicity of the time-of-flight (TOF) detectors. In this paper, the non-isochonicity is described by a...
Recent measurements of two-particle correlations within jets in high-multiplicity pp collisions at √s = 13.6 TeV reveal flow-like patterns among jet constituents. Such effects were previously considered unique to heavy-ion collisions, suggesting that a hot, dense QCD medium may form even inside jets in small systems. As this medium hadronizes, substantial final-state hadronic interactions can...
A unit detector of the FAZIA(Forward-angle A and Z Identification Array) telescope consists of three layers with two silicon sensors and a CsI scintillator. The silicon sensors measure the energy loss of charged particles passing through or stopped in the detector. The FAZIA detector can distinguish charges up to Z = 52 and isotopes up to Z = 25 by using ΔE-E correlation and the pulse shape...
Nucleon–nucleon (NN) interactions inside nuclei are expected to be modified by nuclear medium effects. To investigate these effects, we are developing the focal-plane proton polarimeter (2nd-FPP), designed to measure proton polarization via the left–right asymmetry in elastic p–¹²C scattering, with particle tracking provided by multi-wire drift chambers (MWDCs).
A calibration experiment at...
The beamlines at RIBF of RIKEN use a delay-line parallel plate avalanche counter (DL-PPAC) as a standard heavy-ion detector. On the other hand, we are developing Strip-Readout PPAC (SR-PPAC), which reads out signals for each strip and raise position resolution by taking the weighted average of charge information. SR-PPAC uses the RPA-132 preamplifier discriminator developed by Hayashi Repic...
