T. L. Tang
A5026212975- Nuclear physics research studies
- Nuclear Physics and Applications
- Quantum Chromodynamics and Particle Interactions
- Advanced NMR Techniques and Applications
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Advanced Chemical Physics Studies
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Medical Imaging Techniques and Applications
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Inorganic Fluorides and Related Compounds
- Nuclear reactor physics and engineering
- Quantum, superfluid, helium dynamics
- Electron Spin Resonance Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Mass Spectrometry Techniques and Applications
- Superconducting Materials and Applications
- Gamma-ray bursts and supernovae
- Neutrino Physics Research
- Electromagnetic Scattering and Analysis
- Radiopharmaceutical Chemistry and Applications
- Near-Field Optical Microscopy
- Experimental and Theoretical Physics Studies
Renmin University of China
2025
Argonne National Laboratory
2019-2024
Florida State University
2022-2024
Osaka University
2017-2020
The University of Tokyo
2013-2020
RIKEN Nishina Center
2020
Tokyo University of Science
2014
Hong Kong University of Science and Technology
2008
University of Hong Kong
2008
Excited-state spectroscopy from the first Facility for Rare Isotope Beams (FRIB) experiment is reported. A 24(2)-$\mu$s isomer was observed with FRIB Decay Station initiator (FDSi) through a cascade of 224- and 401-keV $\gamma$ rays in coincidence $^{32}\textrm{Na}$ nuclei. This only known microsecond ($1{\text{ }\mu\text{s}}\leq T_{1/2} < 1\text{ ms}$) region. nucleus at heart $N=20$ island shape inversion crossroads spherical shell-model, deformed ab initio theories. It can be represented...
The dependence of the single-particle strength on difference between proton and neutron separation energies is studied for oxygen isotopes in a wide range isospins. cross sections quasi-free (|$p,2p$|) reaction |$^{14,16,18,22,24}$|O were measured at intermediate energies. are compared to predictions based distorted wave impulse approximation shell-model |$psd$| valence-space spectroscopic factors. reduction factors, which ratio experimental theoretical predictions, show no apparent...
New half-lives for exotic isotopes approaching the neutron drip-line in vicinity of N∼28 Z=12-15 were measured at Facility Rare Isotope Beams (FRIB) with FRIB decay station initiator. The first experimental results are compared to latest quasiparticle random phase approximation and shell-model calculations. Overall, consistent available theoretical descriptions suggest a well-developed region deformation below ^{48}Ca N=28 isotones. erosion Z=14 subshell closure Si is experimentally...
The spin-orbit splitting between neutron 1p orbitals at 33Si has been deduced using the single-neutron-adding (d,p) reaction in inverse kinematics with a beam of 32Si, long-lived radioisotope. Reaction products were analyzed by newly implemented SOLARIS spectrometer reaccelerated-beam facility National Superconducting Cyclotron Laboratory. measurements show reasonable agreement shell-model calculations that incorporate modern cross-shell interactions, but they contradict prediction proton...
Solenoidal spectrometers are gaining popularity worldwide due to their large acceptance and superior Q-value resolution in reactions involving radioactive beams. This work introduces a novel recoil energy calibration method leveraging known excited states. Building on this calibration, we describe an algorithm that transforms energy-position data into excitation center-of-mass. approach has been integrated the HELIOS online analysis routines, enabling real-time speedy generation of spectra...
Abstract High-quality intergenerational relationships positively influence cognitive functioning in older parents. However, there is insufficient information on how they shape the trajectories of mothers’ and fathers’ decline multi-child families, owing to complexity relationships, such as multi-dimensional ambivalent natures differences varying across children. Drawing three waves data (2014, 2016 2018) from a nationally representative survey – China Longitudinal Ageing Social Survey (N =...
Introduction Direct reactions are crucial tools for accessing properties of the atomic nucleus. Fundamental and exotic phenomena such as collective modes, pairing, weakbinding effects evolution single-particles energies can be investigated in peripheral collisions between a heavy nucleus light target. The necessity using inverse kinematics to reveal how these structural change with isospin imbalance renders direct challenging technique when missing mass method. Methods In this scenario,...
The nuclei below lead but with more than 126 neutrons are crucial to an understanding of the astrophysical r process in producing heavier A∼190. Despite their importance, structure and properties these remain experimentally untested as they difficult produce nuclear reactions stable beams. In a first exploration shell this region, neutron excitations ^{207}Hg have been probed using neutron-adding (d,p) reaction inverse kinematics. radioactive beam ^{206}Hg was delivered new ISOLDE Solenoidal...
A complete high-precision set of deuteron analyzing powers for elastic deuteron-proton (dp) scattering at 250 and 294 MeV/nucleon has been measured. These data previously existing sets the cross section similar energies are compared to results three-nucleon Faddeev calculations based on modern nucleon-nucleon (NN) potentials alone or combined with two models forces: Tucson-Melbourne 99 Urbana IX. Large discrepancies between pure NN theory data, which not resolved by current forces, were...
The isospin character of p-n pairs at large relative momentum has been observed for the first time in ^{16}O ground state. A strong population J,T=1,0 state and a very weak J,T=0,1 were neutron pickup domain ^{16}O(p,pd) 392 MeV. This dependence transfer is not reproduced by distorted-wave impulse approximation calculations with known spectroscopic amplitudes. results indicate presence high-momentum protons neutrons induced tensor interactions ^{16}O.
The neutron-shell structure of $^{25}$F was studied using quasi-free (p,2p) knockout reaction at 270A MeV in inverse kinematics. sum spectroscopic factors $\pi$0d$_{5/2}$ orbital is found to be $1.0 \pm 0.3$. However, the factor for ground-state transition ($^{25}$F, $^{24}$O$_{g.s.}$) only $0.36\pm 0.13$, and $^{24}$O excited states are produced from 0d$_{5/2}$ proton knockout. result shows that core nucleus significantly differs a free nucleus, consists 35% $^{24}$O$_{g.s}$. 65% $^{24}$O.
Absolute cross sections for the addition of s- and d-wave neutrons to ^{14}C ^{14}N have been determined simultaneously via (d,p) reaction at 10 MeV/u. The difference between neutron proton separation energies, ΔS, is around -20 MeV ^{14}C+n system +8 ^{14}N+n. population 1s_{1/2} 0d_{5/2} orbitals both systems reduced by a factor approximately 0.5 compared with independent single-particle model, or about 0.6 when shell model. This finding strongly contrasts results deduced from...
We demonstrate a new technique for obtaining fission data nuclei away from β stability. These types of are pertinent to the astrophysical r process, crucial complete understanding origin heavy elements, and developing predictive model fission. also important considerations terrestrial applications related power generation safeguarding. Experimentally, such scarce due difficulties in producing actinide targets interest. The solenoidal-spectrometer technique, commonly used study...
The single-particle properties of $^{29}\mathrm{Mg}$ have been investigated via a measurement the $^{28}\mathrm{Mg}(d,p)^{29}\mathrm{Mg}$ reaction, in inverse kinematics, using ISOLDE Solenoidal Spectrometer. negative-parity intruder states from $fp$ shell identified and used to benchmark modern shell-model calculations. systematic data on centroids along $N=17$ isotones show good agreement with predictions describing observed trends stability toward $^{25}\mathrm{O}$. However, there is also...
About half of the heavy elements beyond iron are known to be produced by rapid neutron capture process, as $r$ process. However, astrophysical site producing process is still uncertain. Chemical abundances observed in several cosmic sites indicate that different mechanisms should at play. For instance, around silver measured a subset metal-poor stars presence weak This may active neutrino-driven winds core collapse supernovae where $(\ensuremath{\alpha},n)$ reactions dominate synthesis...
The lifetimes and spin–lattice relaxation time of photo-excited triplet electron pentacene doped in p-terphenyl at room temperature have been investigated. Values previously reported ESR studies are inconsistent with each other. In this paper, we determined these constants based on proton signals enhanced by dynamic nuclear polarization using the electrons (Triplet-DNP). combined analysis dependences signal intensities delay transfer laser pulse structure allows us to disentangle...
The level structure of $^{36}\mathrm{Al}$ has been studied via $\ensuremath{\beta}$ decay $^{36}\mathrm{Mg}$ at the Facility for Rare Isotope Beams (FRIB) and National Superconducting Cyclotron Laboratory (NSCL). A long-lived isomer in was identified which decays by to an excited state $^{36}\mathrm{Si}$. ground isomeric were found populate different energy levels results from two data sets present work complement each other. Configuration interaction calculations performed with FSU...
The ^{22}Mg(α,p)^{25}Al reaction rate has been identified as a major source of uncertainty for understanding the nucleosynthesis flow in Type-I x-ray bursts. We report direct measurement energy- and angle-integrated cross sections this 3.3-6.9 MeV center-of-mass energy range using MUlti-Sampling Ionization Chamber (MUSIC). new is factor ∼4 higher than previous within temperatures relevant bursts, resulting ^{22}Mg waiting point burst to be significantly bypassed via (α,p) reaction.
Low-lying negative-parity states in $^{11}\mathrm{Be}$ having dominant $p$-wave neutron configurations were studied using the $^{12}\mathrm{B}(d,^{3}\mathrm{He})\phantom{\rule{0.16em}{0ex}}^{11}\mathrm{Be}$ proton-removal reaction inverse kinematics. The $1/{2}_{1}^{\ensuremath{-}}$ state at 0.32 MeV, $3/{2}_{1}^{\ensuremath{-}}$ 2.56 and one or both of including $5/{2}_{1}^{\ensuremath{-}}$ level 3.89 MeV $3/{2}_{2}^{\ensuremath{-}}$ 3.96 populated present reaction. Spectroscopic factors...
Deuteron elastic scattering from 15C and inelastic reactions to the first excited state of were studied using a radioactive beam in inverse kinematics. The scattered deuterons measured HELIOS. differential cross sections analyzed optical model. A matter deformation length {\delta}d = 1.04(11) fm has been extracted state. ratio neutron proton matrix elements Mn/Mp 3.6(4) determined this quadrupole transition. Neutron effective charges core-polarization parameters discussed. Results ab-initio...
Nucleon-transfer sum rules have been assessed via a consistent reanalysis of cross-section data from neutron-adding ($d,p$) and -removing ($d,t$) reactions on well-deformed isotopes Gd, Dy, Er, Yb, W, with $92\ensuremath{\le}N\ensuremath{\le}108$, studied at the Niels Bohr Institute in 1960s 1970s. These are complemented by new measurements cross sections using ($d,p$), ($d,t$), ($p,d$) subset these nuclei. The rules, defined Nilsson-model framework, remarkably consistent. A single overall...